{"case_id":"ovi_davinci/multitalker/multitalker_1/example.json::00000043","text_prompt":"A cinematic domestic scene opens in a steady medium-wide shot, framed in 16:9, with warm, soft key lighting from a table lamp that creates a homely atmosphere and minimal shadows across wood-panelled walls adorned with framed family photographs and a floral print. The colour palette leans into earthy reds, browns, and muted greens, establishing a cozy, nostalgic mood. In the foreground, a red-and-white checkered sofa draped with a multicoloured crocheted throw anchors the composition. An older teenage boy with shoulder-length wavy brown hair reclines comfortably, his right leg crossed over his left knee. Dressed in a light-grey graphic T-shirt, loose blue jeans, and black high-top sneakers, he holds a black TV remote loosely while a white bowl of popcorn rests on his lap. Beside him, a younger pre-teen boy in a blue-green-yellow plaid shirt and dark jeans bends forward, rummaging beneath the cushions and shifting pillows. Only the faint rustle of fabric breaks the quiet as the older boy turns his head, curiosity softening his expression.\n\n\"What are you looking for?\" the older boy asks, his voice calm, mid-range, and lightly teasing. The younger boy straightens up, clutching a folded red blanket, and answers quietly but firmly, \"A brooch.\" The older boy tilts his head, genuinely puzzled, and replies, \"What's a brooch?\" The camera responds with a subtle push-in, tightening the frame around their faces to emphasise the moment of confusion. As the younger boy begins to explain, \"It's a piece of jewelry used to fasten clothes or hold fabric together,\" his voice trails off naturally, leaving the question hanging in the still air. The moderate depth of field keeps both boys sharp while softly blurring the dark wooden hutch and scattered domestic props, reinforcing the quiet generational distance hinted at by the unfamiliar term. No background music plays; the scene rests entirely on their exchange and the gentle, ambient sounds of a quiet afternoon at home.","video_1_relative_path":"videos/cdc479cd0429d154.mp4","video_2_relative_path":"videos/e9e9c918eca74556.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_davinci/multitalker/multitalker_10/example.json::00000045","text_prompt":"Fantasy school drama scene, static medium-close shot, shallow depth of field, soft even frontal lighting casting faint shadows against a brown textured wall of large rectangular tiles. Three young men in matching purple uniforms with silver epaulettes, double-breasted buttons, and high collars stand together, the crest on the rightmost figure’s chest displaying a gold-and-silver shield topped with a golden sun over a blue wavy band. The man on the right lowers his gaze, brow furrowed, lips pressed in concern, while the central figure cradles a small light-wooden device adorned with a yellow cord and a turquoise-green charm that glows faintly green. A low, tense orchestral underscore of sustained minor-string notes fades in as a male with a mid-to-high tenor voice, speaking in urgent, slightly breathy Standard Mandarin, states, \"就醒过来了。\" The central figure looks up with widened eyes, then glances down at the wooden device, his expression shifting from surprise to anxious agreement.\n\nThe rightmost figure lifts his head, turns fully toward his companion, and raises both hands to chest level with palms open and fingers splayed, his tone growing more emphatic as he continues, \"这样听起来问题还是很大。\" He nods once, jaw tightening, and adds with resolute conviction, \"我觉得要把米雅星的状况告诉费斯特校长。\" The central figure listens intently, brows knitted, while a partially visible third man on the far left remains motionless, observing in silence. The camera stays locked off, holding the shallow focus on their faces and subtle hand movements, allowing the restrained string score to sustain its subdued tension without swelling. The three hold their positions for a beat, the unresolved atmosphere and lingering musical note underscoring the gravity of the situation before the scene fades to black.","video_1_relative_path":"videos/134c3a11b00e52ef.mp4","video_2_relative_path":"videos/a2c452e525fbf305.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_davinci/multitalker/multitalker_11/example.json::00000034","text_prompt":"Opening on a medium close-up under soft, overcast daylight, a young East Asian woman stands on a paved suburban driveway, her dark hair tied in a low ponytail beneath a white baseball cap bearing a black interlocking “SF” logo. She wears a light-grey hoodie layered under a shiny sky-blue sleeveless puffer vest, and a calm, neutral female Mandarin voice begins, stating “四个人坐下来打打麻将，还可以促进一下感情。” The camera holds a steady, shallow focus that gently blurs the out-of-focus trees and brick garage door behind her, keeping the mood intimate and grounded. A reverse over-the-shoulder shot then reveals the man she is addressing, an East Asian adult in a black “SF” cap, blue-and-white plaid shirt, and beige quilted vest, with a white pickup truck parked softly out of focus in the background. His attentive expression melts into a broad, warmly amused smile as a warm, affectionate male Mandarin voice replies with a light chuckle, “我怎么有个这么优秀的太太呀？”\n\nThe frame naturally widens to a full family tableau beside a silver Subaru SUV, its chrome “HERCULES” badge catching the diffuse light, while a small child in a bright-blue puffer jacket clings to the woman’s left leg, clutching a pale stuffed toy. The man steps forward, rests his hands on her shoulders, and pulls her into a brief, heartfelt embrace, and a half-teasing, sentimental male Mandarin voice murmurs, “要是没有了你我该怎么办？” The scene is bathed in even, shadowless daylight, with a cool palette of muted greys, blues, and earthy browns punctuated only by the child’s vivid jacket and the subtle greenery beyond a neat white picket fence. Minimal ambient sound underscores the quiet domesticity as the trio lingers in this warm, slice-of-life moment, the camera remaining static and intimate throughout to preserve the unspoken tenderness of the exchange.","video_1_relative_path":"videos/ece0eee6b4f8316a.mp4","video_2_relative_path":"videos/1e2118040ada121b.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_davinci/multitalker/multitalker_11/example.json::00000052","text_prompt":"Shot in a locked-off 16:9 medium two-shot at eye level, the scene unfolds on a quiet roadside at night, bathed in the cool, hard-edged glow of a single overhead streetlamp. The low-key lighting carves pronounced chiaroscuro across the frame, casting long shadows against the asphalt while the background dissolves into near-black. A shallow depth of field keeps the subjects crisp, softening the distant foliage, and the desaturated earth tones of the surroundings contrast sharply with the lamp’s pale illumination. In the foreground, a blonde woman in her early thirties stands rigid, wearing a pale short-sleeved button-down with pens tucked in the breast pocket, a lit cigarette held between her fingers. Behind her and slightly to the left, a man in his mid-thirties wears a light tan suit jacket, white dress shirt, and red patterned tie. The air is utterly still, devoid of wind or traffic, leaving only the hush of the night. The man leans forward, his brow furrowed with urgent desperation, and speaks in a strained, pleading baritone: “Can you please just get back in the car and talk about this instead of running all over Route 12?” As he pleads, the woman exhales a thin ribbon of smoke that catches the lamplight before curling upward into the darkness.\n\nShe lifts her gaze from the road, inhales once more, and flicks ash away, her lips tightening as frustration edges into her expression. Without waiting for a response, she turns her head sharply toward him, her voice clipped and irritated: “Haven’t I made it clear I don’t particularly want to talk about it?” She punctuates the retort by tapping the cigarette lightly against her palm, sending another wisp of smoke drifting into the cool white pool of light. The man’s posture stiffens; he offers no reply, instead staring ahead as if bracing for further confrontation. The scene holds in a tense, unbroken silence, the lone streetlamp isolating them visually against the absolute darkness, their standoff underscored by the quiet tension of avoidance clashing with desperate insistence.","video_1_relative_path":"videos/eecb088929daff7a.mp4","video_2_relative_path":"videos/0df019712851dc65.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_davinci/multitalker/multitalker_11/example.json::00000067","text_prompt":"Shot on a steady wide master lens, the scene opens in a brightly lit, cluttered laboratory-workshop that fills the frame from floor to ceiling with shelves of parts bins, tool chests, and hanging apparatuses. Benches are strewn with electronic gear, glassware, cables, oscilloscopes, soldering stations, and copper coils, establishing a dense, tech-savvy workspace bathed in even, high-key illumination that minimizes shadows. The color palette is dominated by neutral greys and browns of the equipment, sharply contrasted by the woman’s vivid red T-shirt with a large yellow-orange butterfly graphic and the man’s rust-colored pants. Two figures stand facing each other amid the utilitarian chaos. On the left, a young man with short brown hair, black-rimmed glasses, a grey hoodie layered under a dark sleeveless vest, and rust-colored pants stands with a relaxed but attentive posture, his hands resting near his sides. Opposite him, a woman with shoulder-length wavy brown hair and glasses wears an open camouflage zip-up hoodie over her shirt and dark trousers. As a soft burst of studio audience laughter fades in and out, she begins in a clear, analytical yet conversational tone, “Interesting.”\n\nWithout camera movement, she continues, gesturing lightly with both hands as she poses a measured, earnest question laced with curiosity: “And would you agree that the primary way we would evaluate either the success or failure of a date would be based on the biochemical reaction during the good night kiss?” The man listens intently, occasionally shifting his weight and glancing toward her before turning slightly away to reach for a tall metal stool with a round seat beside him. He places a hand on its backrest, steps backward a pace, and lowers himself onto it, his expression thoughtful with his eyebrows faintly raised as he processes her words. She maintains steady eye contact, her hands still mid-gesture, awaiting his response. A straight cut then shifts to a tighter medium close-up of the woman, her lips moving precisely with the final clause of her query. Behind her, a white wall displays a small red “NO SMOKING” sign and the edge of a chalkboard bearing faint writing. The ambient soundscape remains otherwise silent, leaving only the tail end of her voice hanging in the air as the scene concludes.","video_1_relative_path":"videos/39b8b2ab791d10ff.mp4","video_2_relative_path":"videos/ec75db3b14f9096b.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_davinci/multitalker/multitalker_2/example.json::00000065","text_prompt":"A contemporary drama scene shot from the front passenger seat, utilizing a 50mm lens to capture soft overcast daylight washing the car interior in muted beige-green tones. A shallow depth of field keeps the focus sharp on the rear bench, where a man in a dark grey pin-striped blazer and off-white button-down leans forward with a knitted brow, while a woman with shoulder-length wavy blonde hair and a black lace-trimmed sleeveless top turns toward him, her expression tightening with frustration. The low, constant hum of the engine and faint road noise ground the confined space as she snaps, her General American accent sharp and clipped, \"No, I didn't. And it pisses me off, okay?\"\n\nThe camera cuts to a tighter close-up on the woman as her irritation escalates into open anger, her voice gaining force with each accusation. Outside the window, blurred greenery and passing vehicles streak past, underscoring the relentless motion as she delivers, \"You come here to Paris, all romantic and married. Okay? Screw you.\" The shot reverses to a close-up of the man, his jaw setting and eyes widening as he attempts to de-escalate the tension with a lower, measured tone, \"Don't get me wrong.\" The absence of music and the steady, subdued ambient car sounds keep the focus entirely on their raw, unresolved verbal exchange, leaving the emotional imbalance hanging in the air as the scenery continues its gentle blur.","video_1_relative_path":"videos/c5fd15778adcf9a3.mp4","video_2_relative_path":"videos/8690b2335a491894.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_davinci/multitalker/multitalker_2/example.json::00000083","text_prompt":"A continuous, eye-level medium shot tracks backward as a man and woman walk toward the camera along a narrow, sunlit European street lined with beige stone buildings and black iron fencing. Soft daylight bathes the scene, casting warm highlights on the façades and gentle shadows across the pavement. Both are dressed in dark jackets over lighter shirts; the woman carries a brown leather shoulder bag and keeps her gaze mostly forward, while the man turns his head toward her as they converse. The only sounds are their steady, mid-level footsteps crunching in perfect rhythm with their stride and a faint, low urban hum that grounds the scene in reality.\n\nA calm, neutral female voice begins, stating, \"It's both flattering and disturbing at the same time.\" Her lips move with a thoughtful expression as she looks slightly off-camera. The man responds immediately, turning his face toward her with mild curiosity, and asks, \"How is it disturbing?\" After a brief pause, the woman glances down before meeting his eyes again, her tone reflective and slightly hesitant as she replies, \"I don't know. It's just the feeling of being part of someone else's memory.\" Her facial expression softens accordingly, and the steady cadence of their footsteps continues uninterrupted until the shot holds, leaving the intimate exchange suspended in the quiet, sun-drenched alley.","video_1_relative_path":"videos/359c592cfe7f697a.mp4","video_2_relative_path":"videos/a6ae22d63dd5a0a3.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_davinci/multitalker/multitalker_3/example.json::00000047","text_prompt":"A locked-off medium shot captures a brightly lit Japanese classroom, filmed from the aisle with soft natural daylight filtering through frosted-glass windows. Rows of wooden desks with metal frames recede into the background, where a few male students in matching black uniforms linger near the rear door beside a green bulletin board and a white sports bag hanging on a wall hook. The shallow depth of field keeps the foreground sharp, focusing on a teenage boy with tousled blond hair in a black gakuran jacket and a teenage girl with short dark hair wearing a grey sailor-style uniform with a pale-blue scarf. The boy leans forward with his forearms resting on the desk, gazing at the girl opposite him as a calm, clear female Japanese voice begins, stating \"席の件なんですけど、前の方は普通の生徒が座る席です。\" She raises both hands to chest level with relaxed palms facing each other, then briefly points her right index finger toward herself to emphasize the distinction.\n\nContinuing her matter-of-fact explanation, the girl sweeps her right hand backward over her shoulder to indicate the rear rows. The same voice adds \"後ろ二列はつっぱりが座ることになってるので。\" with a steady pace and a subtle downward inflection that carries a hint of resigned humor. The boy listens motionlessly at first, lips pressed and eyes fixed on her, but his posture gradually softens as he lowers his gaze to the desktop and his shoulders slump slightly. The scene is underscored only by a faint, clean indoor room tone, allowing the clear, foregrounded speech to carry the quiet, slice-of-life atmosphere of a typical Japanese school drama.","video_1_relative_path":"videos/688f9d189edb72b7.mp4","video_2_relative_path":"videos/56a9105b23f07e63.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_davinci/multitalker/multitalker_4/example.json::00000031","text_prompt":"A quiet, intimate domestic scene unfolds in soft, natural daylight, captured with a static medium shot, shallow depth of field, and a muted neutral palette punctuated by subtle botanical accents. A young East Asian woman stands in a tidy living space, her dark hair gathered in a loose bun with blunt bangs, wearing a white rib-knit sweater with sheer lace sleeves and a black armband on her left arm. Behind her, a black metal shelf holds potted greenery and small framed photographs, while a monochrome print of a wooden pier over water hangs on the wall beneath the quiet caption “LIFE IS GOOD WHEN YOU’RE HERE.” She looks slightly off-camera to her right, smiling politely as she speaks in a warm, cordial tone, “After all, we’re family, so let’s keep in touch and visit more often.” The room is bathed in even, diffused illumination, with a white drying rack and carefully arranged decor reinforcing a calm, contemporary homeliness.\n\nA straight cut shifts to an over-the-shoulder static medium shot of a second East Asian woman seated near the same bright window. She wears a grey turtleneck beneath a charcoal coat, her long, softly waved dark-brown hair framing a composed expression. A yellow-and-black patterned throw drapes over her chair, and a leafy plant sits just behind her as she cradles a delicate white porcelain teacup with pink floral motifs and gold trim in one hand, a black smartphone resting lightly in the other. She glances down at the phone, then lifts her gaze to the first woman, offering a mild, appreciative remark in a calm, measured voice, “The coffee is quite nice.” The scene remains entirely hushed, with no music or extraneous noise, relying solely on the natural window light to cast soft shadows and underscore the understated warmth and quiet reconciliation between the two. The composition balances them with thoughtful negative space, emphasizing intimacy and maturity in this restrained, everyday moment.","video_1_relative_path":"videos/de59c81b1598d32a.mp4","video_2_relative_path":"videos/c9c077b611e84bfe.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_davinci/multitalker/multitalker_6/example.json::00000006","text_prompt":"A tense, thriller-style scene opens on a static medium-close two-shot inside a sparsely furnished room that feels like an improvised shelter or trailer. Daylight filters through horizontal blinds at the left, casting soft side-light and gentle chiaroscuro shadows across the scene. In the background, an old black CRT television rests on a wooden cabinet, its screen displaying a brightly colored but softly blurred sports broadcast. An older bald man with thin-rimmed glasses and a green-and-white vertical-striped button-down leans forward from behind a table, elbows resting, hands loosely clasped. His brow is furrowed, eyes fixed just off-camera to the right as a strained, earnest male voice with a mild non-native accent states, \"My gun.\" Beside him, a younger man in a hooded jacket with a vivid red hood and black leopard-print pattern turns toward him, his right hand raised to his chin as he nervously bites a thumbnail. A calm, energetic female Spanish voice from the television underscores the tension, calling out play-by-play commentary in the background.\n\nA quiet, incredulous male voice with a neutral American accent replies, \"How was I supposed to know?\" The camera remains completely still, using a shallow depth of field to isolate the two men against the muted interior, emphasizing their psychological confinement. As the exchange tightens, the younger man leans in slightly, his defensive posture shifting as he begins to press his point, his voice growing tense, stating, \"You were showing me...\" The ambient indoor hum persists, blending with the distant sports broadcast, while the naturalistic lighting continues to carve sharp contrasts across their faces. The scene holds on this suspended moment of unresolved conflict, the bright colors of the television screen clashing with the subdued room, leaving the narrative tension hanging in the air as the clip ends.","video_1_relative_path":"videos/9496372cdb039267.mp4","video_2_relative_path":"videos/8c015ec3318eaf16.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_davinci/multitalker/multitalker_6/example.json::00000032","text_prompt":"A warmly lit, intimate bedtime scene unfolds in a cozy child’s bedroom, captured on a 35mm lens that begins in a medium close-up before executing a slow, steady zoom-out to a wider medium shot. The room is bathed in a palette of warm pinks, creams, and rich wood tones, illuminated by the practical amber glow of a bedside lamp on the right and soft daylight filtering through sheer curtains on the left. A young girl with light-brown curly hair, dressed in a pale-pink lace-trimmed pajama top, sits upright on a dark-wood bed layered with a white pillow and a pinkish blanket. Behind her, an adult woman with blonde hair tied in a loose bun gently wraps a large, shiny rose-gold satin scarf around the girl’s head like a turban. As the woman adjusts the fabric, the faint rustle of satin cutting through the quiet room, the girl tilts her head back slightly and asks in a small, curious voice, \"This really works?\"\n\nThe camera continues its gentle retreat, revealing more of the intimate surroundings: a colorful poster of teenage boys above the headboard, shelves lined with books, and a nightstand crowded with stuffed animals including a brown teddy bear and a purple bunny. The woman finishes securing the scarf, smoothing it with practiced fingers, and answers in a calm, reassuring tone, \"Your hair will look just as pretty tomorrow.\" The girl listens attentively, her eyes bright, then lets out a soft, satisfied sigh. With the headwrap complete, the woman straightens up, smiles encouragingly, and says, \"Now come on, let’s tuck you in.\" She reaches for the edge of the blanket, beginning to pull it toward the girl’s shoulders as soft fabric swishes fill the hushed ambience. The girl leans forward slightly, preparing to lie down, and the scene settles on the two of them poised for bedtime, framed by the comforting clutter of childhood memories and bathed in the warm, steady lamplight.","video_1_relative_path":"videos/7e40aa888414420d.mp4","video_2_relative_path":"videos/477c838d6040102c.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_davinci/multitalker/multitalker_7/example.json::00000066","text_prompt":"Cinematic drama, shot on a 35mm lens with a medium over-the-shoulder perspective that tracks forward along a sunlit Parisian sidewalk. Diffuse daylight casts soft shadows across the scene, highlighting a rich palette of warm architectural tones and natural fabrics. A man in a dark grey textured suit jacket walks beside a blonde woman in an off-white tweed jacket and brown leather shoulder bag. To their right, a classic red-fronted café stands with large glass windows, its facade marked by white painted lettering reading \"RESTAURANT\" above the entrance and \"LIQUEURS DE MARQUES\" on the glass, alongside a vertical blue sign advertising fine French and Algerian wines. Warm interior lighting spills onto the pavement, revealing a bartender in a brown shirt and a solitary patron at the counter. As they stroll, the rhythmic impact of footsteps on hard pavement blends with a low urban hum and distant traffic rumble.\n\nThe couple slows and stops just outside the café’s open doorway. The man turns his head left, revealing short brown hair and a slight smile, then gestures lightly with his right hand as he speaks. A calm, neutral female voice begins, stating, \"We must find a way to justify their economic greed.\" The woman pivots fully to face him, her expression attentive, while a calm, teasing male voice with a mid-thirties American accent adds, \"Is there any particular imperialist country you have in mind there, Frenchie?\" He tilts his head slightly, maintaining playful eye contact. She listens with lips closed, briefly raising her right hand to touch her chin in contemplation, then shakes her head minutely and offers a small, dismissive smile as she replies, \"No, not really.\" He echoes back with a curious lift of his eyebrows, \"No?\" Their exchange settles into mutual understanding, framed steadily at waist height against the café’s interior and exterior signage. The ambient city sounds linger beneath their dialogue, punctuated only by the subtle rustle of fabric and light breaths, before naturally fading into silence as the camera holds its static position.","video_1_relative_path":"videos/6c5dd66cf25a49a7.mp4","video_2_relative_path":"videos/825b2c01d5bb418e.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_davinci/multitalker/multitalker_7/example.json::00000087","text_prompt":"Cinematic handheld tracking shot, natural daylight, warm stone palette, and a narrow sunlit European street lined with weathered buildings set the scene. The camera maintains a steady medium-long distance behind two main subjects—a blonde woman in a cream tweed jacket and blue jeans, and a dark-haired man in a charcoal suit—walking side-by-side toward the lens. As they approach, the camera eases into a slow push-in, transitioning to a medium close-up that frames their animated conversation against a backdrop of a passing pedestrian in a grey hoodie and shopfronts displaying French signage. The soundscape is strictly diegetic, layered with distant traffic rumble, faint tire hiss, and indistinct pedestrian chatter that reverberates gently off the hard stone surfaces.\n\nThe woman speaks with rapid, assertive cadence, her American accent cutting clearly through the ambient city noise as she gestures emphatically with her right hand. An energetic female voice begins, stating, \"We’re getting a bit better. Okay, we’re moving all our industry to developing nations where we can get cheap labor, free of any environmental regulations.\" The man turns his head toward her, raising his left hand palm-out in a calm, corrective interruption. A calm, neutral male voice interjects, saying, \"Wait a minute.\" Subtle foley of soft footfalls on pavement and the rustle of their clothing syncs precisely with their movements, grounding the scene in realistic immediacy. The interaction carries a quiet tension, pitting her impassioned economic argument against his restrained intervention, all set within the unscripted bustle of an everyday urban afternoon.","video_1_relative_path":"videos/97a7b4c0ecf845eb.mp4","video_2_relative_path":"videos/c070b7d051344287.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_davinci/multitalker/multitalker_8/example.json::00000068","text_prompt":"Cinematic medium two-shot, eye-level perspective, locked off on a tripod, opens inside a warmly lit bookstore bathed in soft, earthy tones and a muted color palette punctuated by vibrant book spines. Tall wooden shelves packed with multicolored volumes fill the background, anchored by a rough-hewn stone pillar at the left edge and a promotional poster for a new release resting on an upper-right shelf. In the foreground, an older, balding man with white hair and a neatly trimmed goatee holds a single sheet of white paper in his left hand, gesturing lightly with his right. He speaks in a calm, practical British accent, stating, \"Get your driver Philippe's card so that you can call his cell if you're running late.\" Opposite him stands a younger man in his thirties, dressed in a dark suit jacket over a pale patterned shirt, with short dark-brown hair and light stubble. He listens attentively as soft, warm key lighting from the front-left washes over both faces, casting gentle fill that prevents harsh shadows and keeps the shallow depth of field focused sharply on the two men while the surrounding aisles remain softly blurred.\n\nAs the conversation continues, a woman with blonde hair tied back and wearing a light beige cardigan walks through the mid-ground from the right aisle toward the left, her figure drifting out of focus behind the primary subjects. The older man finishes his thought, his voice softening slightly as he adds, \"We will put your bags in the car so you are not late going to the airport.\" The younger man responds with a brief, polite smile and a small affirmative nod, emphasizing the subdued, everyday nature of the exchange. In the deeper background, another shopper with long brown hair briefly appears on the left before moving out of frame. The scene holds steady in its quiet ambience, with no music or crowd noise to distract from the practical, grounded interaction.","video_1_relative_path":"videos/e6c0ddf792a2a8c6.mp4","video_2_relative_path":"videos/a5eb56355fe6df99.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_davinci/multitalker/multitalker_9/example.json::00000052","text_prompt":"Cinematic romantic-drama, 16:9 widescreen, shallow depth of field, and warm golden-hour lighting bathe a late-afternoon riverside promenade in rich amber tones. A handheld camera tracks backward at a gentle sway, framing a medium two-shot of a blonde woman and a dark-haired man walking side by side toward the lens. Soft shadows stretch across cobblestones and an old stone embankment, while out-of-focus café tables, leafy trees, and a calm river populate the background. Natural sunlight filters through the canopy, casting moving highlights on their casual attire as they move forward, accompanied by the rhythmic thud of footsteps, the soft scrape of soles on stone, and a low bed of ambient city hum and distant birdsong.\n\nA reflective female voice begins, stating “You know, couples are so confused lately.” She glances down briefly before meeting her companion’s gaze, her brow faintly furrowed as she continues, “I think it must be that men need to feel essential, but the truth is, they don’t anymore.” The man listens attentively, his head angled toward her, expression neutral but engaged, offering an almost imperceptible nod as sunlight flickers across his face. The camera maintains its steady backward drift, keeping them centered while background pedestrians drift past in soft focus. With no score to distract, the scene rests entirely on the foregrounded dialogue and the natural ambience, leaving the pair walking forward into the sunlit distance as the conversation lingers in the quiet air.","video_1_relative_path":"videos/e17fe92325037115.mp4","video_2_relative_path":"videos/a9c3107393e9b2da.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_davinci/voiceover/voiceover_1/example.json::00000069","text_prompt":"A suspenseful domestic thriller opens on a steady medium shot, bathed in warm, dim key lighting that contrasts sharply with the cooler, flatter illumination on the door. The color palette leans into golds, deep purples, and muted browns across the bedding and walls, giving way to dark wood tones and brass highlights in the final frame. The camera holds a medium shot in a dim, warmly lit bedroom, framing a large bed with a dark paneled headboard, gold-and-white bedding, and purple pillows. A shirtless young man with short blond hair and a black tattoo on his left upper arm sits upright against the headboard, eyes wide and mouth slightly open in alarm. Behind him, a woman with long dark-brown hair lies half-reclined, her face tightening with sudden shock as she turns toward something off-screen. A calm, neutral female Mandarin voice-over begins, stating, \"Suddenly caught by the girl's husband,\" while a faint, low-frequency synthesized pad sustains underneath to underscore the tension. Reacting instantly, the woman pulls a red spaghetti-strap camisole over her head and scrambles for cover. A panicked young woman gasps, \"Shit, I think it’s Tony. Oh!\" as the ominous hum continues.\n\nA sharp metallic clack, like a door handle being turned, cuts through the mix. The woman lunges forward, yanking the gold comforter to her chin and sliding out of frame to the right, while the man throws himself backward beneath the covers, shoulders hunched and eyes darting toward the unseen threat. Their hurried movements create soft fabric rustling. A startled young man with short blond hair and a black tattoo on his left upper arm shouts, \"Tony!\" and the woman urgently commands, \"Get your clothes on!\" The image cuts to a close-up of a dark wooden door with a brass lever handle. The handle jiggles once, implying someone outside is trying to open it. The lighting shifts to a cooler, flatter tone, heightening the dramatic tension as the sustained synth pad continues until the scene ends.","video_1_relative_path":"videos/fe0cd6af9c8b5d56.mp4","video_2_relative_path":"videos/a91433e05a3861c7.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_davinci/voiceover/voiceover_2/example.json::00000036","text_prompt":"Cinematic drama, captured with a 50mm lens and shallow depth of field, set in a dimly lit modern lounge at night. A tense, intimate atmosphere is sculpted by chiaroscuro lighting, with a single warm key light falling from camera-left against a muted palette of charcoal, slate, and beige. In a medium close-up over-the-shoulder framing, a Caucasian man in his late twenties, Awen, stands centre-left wearing a dark V-neck sweater over a light striped collared shirt. A metallic watch glints on his left wrist as he lifts it slightly, his brow furrowed and lips parted in an urgent yet controlled demeanor. A calm, neutral female Mandarin voice-over begins, stating \"一下，阿文只能坦白了自己荒唐的动机。\" The background remains nearly silent, anchored only by a faint, steady room tone.\n\nThe camera cuts to a tight close-up of a second Caucasian man in his mid-twenties, seated lower and wearing a light grey crew-neck T-shirt. His face fills the frame, eyes wide and brows raised, mouth open in an anguished grimace with clenched teeth as he looks upward toward Awen. The blurred domestic surroundings isolate his shock and pain, mirroring their emotional distance. Beneath the lingering narration, a strained American male voice delivers the line with measured intensity and sorrow: \"Some part of you loves me.\" His expression tightens further, jaw clenching as if absorbing the emotional weight of the confession. The image holds on his pained face while the ambient sound remains sparse, leaving only the residual room tone to fade into silence.","video_1_relative_path":"videos/88d643d787c793d8.mp4","video_2_relative_path":"videos/dbd3719680b3b5a0.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_davinci/voiceover/voiceover_2/example.json::00000043","text_prompt":"Cinematic drama, shot on a static medium close-up lens with chiaroscuro-style lighting and a cool blue color palette that emphasizes emotional gravity and secrecy. A dimly lit interior unfolds as the frame opens on a woman with short dark hair and large green disc earrings, wearing a collared shirt patterned with thin green-and-white stripes beneath a darker vest. Cool bluish key light falls on the left side of her face, leaving the right half in soft shadow, while horizontal blinds behind her catch faint reflections. She gazes slightly off-camera to her right with an intent, contemplative look, her lips closed as a calm, neutral male Mandarin voice-over begins over a low, tense electronic drone, stating \"才知道女主对迈克有点意思。\" The ambient sound remains minimal, anchored by the steady atmospheric synth bed that reinforces the mounting suspense.\n\nThe camera cuts to a medium close-up of an older man with graying slicked-back hair and a prominent mustache, dressed in a light-colored dress shirt under a dark vest. Strong side-lighting from camera-left sculpts his features, casting venetian-blind shadows across the wall behind him. His brow is furrowed as he fixes his eyes toward the woman just out of frame. Absorbing the narration, his expression deepens, eyes narrowing slightly as his jaw sets. He parts his lips and softly utters, \"Sarah,\" with a tentative upward inflection, then follows with a quiet, earnest inquiry: \"What about Sarah?\" His tone rises inquisitively yet remains restrained. The camera holds on his face as his brows knit and his lips close firmly after the question. The underlying electronic underscore swells imperceptibly, thickening the sense of suspense before fading out as the scene freezes on his serious expression, relying entirely on micro-expressions and unspoken stakes to convey the dramatic tension.","video_1_relative_path":"videos/5a0150c789cf4046.mp4","video_2_relative_path":"videos/46bf7d4767f905c2.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_davinci/voiceover/voiceover_3/example.json::00000013","text_prompt":"Cinematic thriller sequence, shot on a 35mm lens with a shallow depth of field, opening in a dimly lit living room where warm interior tungsten tones clash with cool daylight spilling through a rear window. A young man with shaggy dark-brown hair and a black quilted jacket is framed in a medium close-up, gripping a black semi-automatic pistol with both hands, arms extended toward the camera, his wide eyes and tense mouth conveying raw panic and determination. Behind him, two stacked cardboard boxes and a patterned tapestry hang against a light wall, partially silhouetted by the window light. A tense adult male Mandarin voice-over begins, stating \"He saw the intrusion, and was caught on the spot by the arriving police!\" as a low, suspenseful electronic underscore pulses beneath the scene. The camera suddenly breaks its static hold, cutting to a violent handheld shot from behind a second figure in a dark suit and loosened tie who rushes forward, shouting as the lens jolts past a dark sofa and lamp toward the doorway, the music swelling to match the frantic motion blur.\n\nThe perspective shifts to a point-of-view shot through the window frame, revealing a uniformed police officer standing on the pavement beside a dark-green sedan. The Asian officer, wearing a peaked cap with silver braid and a duty belt, raises his own handgun, aiming steadily into the house. At this moment, the Mandarin narration cuts out, replaced by a resonant, authoritative adult male English voice shouting, \"Drop your weapon!\" The command rings out sharply over the persistent low-frequency score, now layered with faint metallic percussion hits. The sequence concludes with a tight close-up back inside the room, where the young gunman’s face freezes in shock, his jaw slack and eyes glistening as he stares off-screen at the armed officer. The ambient hum of the music sustains, leaving the standoff suspended in unresolved tension, the editing rhythm deliberately slowing to let the climactic moment breathe.","video_1_relative_path":"videos/64d25253921943f4.mp4","video_2_relative_path":"videos/8bfab28da725f531.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/instruments/instruments_1/example.json::00000008","text_prompt":"A cinematic jazz-blues vignette opens in a warmly lit, vintage-styled studio, captured on a static tripod with controlled lighting and a muted, earthy palette. A medium two-shot holds steady on a bassist and a vocalist. The man, dressed in a black flat cap, crisp white shirt, patterned tie, and suspenders, stands at frame left, his right thumb driving a steady, alternating pluck against the thick strings of an upright double bass while his left hand glides along the fretless neck. Each downward strike produces a deep, rounded woody thump that anchors a moderate swing rhythm around one hundred ten to one hundred twenty beats per minute, occasionally punctuated by the soft friction of fingers on the strings. To his right, a woman in a black floral dress, pearl necklace, and red lipstick faces a large silver ribbon microphone. She tilts her head back, smiles, and moves her lips in silent time with the groove, her shoulders swaying gently as she listens to the foundational pulse. The camera remains static, letting their subtle, professional postures fill the intimate space.\n\nA hard cut shifts the perspective closer to a guitarist seated centre-right, clad in a dark pin-striped suit, vest, and red patterned tie. He cradles a steel-string acoustic guitar across his lap, launching into rapid hybrid finger-style picking. His thumb drives alternating bass notes while his index and middle fingers articulate bright, metallic treble arpeggios, creating a shimmering texture that contrasts with the deeper low end. The camera slowly pans downward to focus on his hands, catching the glossy wood grain of the instrument and a purple pick resting between his fingers as his nails flick across the strings under controlled lighting. In the softly blurred background, a violinist raises a bow, preparing to enter. As the rhythm section locks into a steady quarter-note pulse layered with syncopated eighth-note guitar patterns, the violinist draws the bow horizontally across the strings. The resulting warm, sustained mid-range tones weave seamlessly into the harmony, their smooth legato strokes and faint bow-hair friction enriching the close-miked, low-noise acoustic environment without excessive vibrato.\n\nThe shot widens to encompass the full trio, now fully interlocked in a tightly arranged performance. The bassist maintains his unwavering walking line, the guitarist cycles through his four-chord loop with economical, relaxed wrist motion, and the violinist sustains rich chords that blend with the existing major-key progression. The vocalist remains poised before the microphone, her expression calm and attentive, while all three performers sway subtly in time with the gentle swing feel. The ensemble holds this layered texture in quiet concentration, their bodies reflecting a shared professional focus, until the final chord rings out with a brief collective sustain. The image lingers on the harmonious convergence of rhythm and melody before fading out, leaving only the clean, intimate resonance of the recorded performance.","video_1_relative_path":"videos/b5b12bf034acb4b6.mp4","video_2_relative_path":"videos/2bb23c9db332d7f3.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/instruments/instruments_1/example.json::00000010","text_prompt":"A cinematic medium close-up captures a seated clarinetist in a white sweatshirt and grey pants, framed from mid-torso upward against an intimate interior backdrop featuring a decorative tapestry of green leaves and orange shapes, a beige curtain to the right, and the edge of a bookshelf to the left. Even indoor illumination with a neutral white balance provides soft, shadowless lighting for a fixed, eye-level camera that holds steady throughout the sequence. The performer grips a black clarinet with silver keys vertically, mouthpiece near the top of the frame, as a close-miked solo clarinet begins to play. A brisk, warm reedy tone emerges at roughly one hundred and sixty beats per minute, launching into a rapid ascending run of evenly spaced staccato notes. Each crisp attack and short decay is perfectly synchronized with the clarinetist’s precise fingerwork: the right index finger lifts and drops on the top key while the left thumb anchors the instrument, producing a clean, dry signal with negligible room reverberation and a barely perceptible noise floor.\n\nThe melody soon arcs downward into a smooth legato phrase before fracturing into a syncopated flurry of sixteenth notes. The clarinetist’s fingers accelerate into visible blurs across the metal keys, while steady diaphragmatic breath support and subtle chest expansion drive a gradual crescendo from mezzo-forte to forte. After a brief rhythmic pause where all fingers lift and the performer draws a quiet breath, a descending scale emerges, articulated with clear tonguing that generates light percussive clicks aligned with the flicks of the embouchure. The passage quickly accelerates into a virtuosic climax featuring wide intervallic leaps and rapid trills. The right hand executes a high-speed tremolo on the middle register keys, causing the silver pads to shimmer under the steady lighting as the pitch climbs toward the instrument’s upper range. The tone brightens and peaks in volume, yet every note remains sharply separated and precisely controlled through careful embouchure firmness and breath pressure.\n\nThe performance concludes with a final sustained high note, held for a fraction of a second with a subtle vibrato maintained by a stabilized embouchure and consistent airflow. As the pure tone naturally decays into silence, the performer’s fingers relax atop the keys, and the image lingers momentarily on the stilling hands before fading out. The entire sequence captures an intimate solo recital defined by technical mastery, expressive dynamic shaping, and the crisp interplay between breath, tongue, and finger, all rendered in a clean, close-miked audio landscape free of accompaniment or extraneous noise.","video_1_relative_path":"videos/608343fa2b094d9d.mp4","video_2_relative_path":"videos/27790e0c99b22770.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/instruments/instruments_2/example.json::00000066","text_prompt":"Cinematic medium-wide shot, natural daylight illumination, muted blue and white color palette: a static frame captures a seated male cellist in an intimate practice room with deep blue walls and crisp white trim. Warm light streams through a bright window behind him, illuminating a microphone positioned just left of the cello’s bridge. The performer leans slightly forward, his right arm holding the bow at a comfortable angle above the strings while his left hand rests near the fingerboard. A steady, moderate tempo begins immediately as the bow makes contact with the lowest string, producing a warm, resonant low note that blooms and decays. The left-hand fingers press firmly, creating discrete pitch changes as a descending minor triad arpeggio unfolds in smooth, legato strokes.\n\nThe melody ascends stepwise into the middle register, the performer’s right wrist flexing subtly to adjust bow pressure and yield a gentle crescendo. Each note articulates cleanly, flowing into the next as the bow alternates smoothly between up-and-down strokes. The left hand shifts position incrementally, fingers sliding and repositioning to match the rising pitches, while faint room reflections add natural reverberation to the close-mic capture. A brief rhythmic acceleration introduces a run of sixteenth notes, increasing both tempo and intensity. The bow speed quickens, producing brighter, more energetic tones as the performer’s right forearm rotates for greater leverage and his left hand executes rapid, precise finger movements along the neck. The texture grows dense, swelling with urgency until the performance reaches its dynamic peak.\n\nVolume swells to forte as the melodic contour arcs upward before resolving downward in a decisive cadence. The bow draws forcefully across the strings, sustaining longer tones with pronounced resonance, while the left hand anchors momentarily on a higher position before releasing tension as the final chord is struck. Subtle bow-hair friction punctuates the aggressive strokes, grounding the rich, clear timbre in the quiet space. As the last note rings out and decays naturally into the room’s ambient silence, the performer’s posture relaxes slightly, signaling the end of the excerpt. The frame holds briefly on the lingering sound before fading to stillness.","video_1_relative_path":"videos/c66ba6192e56d3ab.mp4","video_2_relative_path":"videos/7d91adf77f98577a.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/instruments/instruments_2/example.json::00000072","text_prompt":"Cinematic outdoor portrait, shot on a 50mm lens with natural daylight and a shallow depth of field that isolates a lone dreadlocked banjo player leaning forward, elbows tucked, torso angled toward the instrument. The camera holds a static medium shot with a subtle tilt that follows the performer’s micro-movements, keeping the focus entirely on the musician’s precise mechanics against a backdrop of a stationary bicycle wheel and leafy foliage. The audio opens with a bright, metallic cascade of steel-string banjo notes, driven by a rapid alternating-thumb roll at a steady mid-fast tempo. The right hand moves in a continuous figure-eight pattern, thumb and index finger striking with sharp, percussive attacks that produce syncopated eighth-note rolls and a dance-like momentum. As the phrase unfolds, the right hand accelerates into a short ascending melodic arc before dropping back, the wrist rotating subtly to maintain fluidity while the left hand anchors chord shapes and slides a fretting finger upward to shift the harmony. A brief rhythmic pause lifts the right hand mid-air, allowing the previous notes to ring in the dry, close-mic’d acoustic space before a descending staccato flourish sweeps downward, shoulders rising with each accented strike. The intensity builds to a climax of rapid-fire picking, then gradually tapers as the right hand slows, transitioning into a sustained open-string drone. The left hand holds the final chord firmly, letting the bright, twangy resonance fade naturally into silence, accompanied only by the faint, crisp slide of fingers against the strings. As the sound dissipates, the musician relaxes their posture, and the camera catches the quiet release of the performance in the still, sunlit air.","video_1_relative_path":"videos/b43a569b2ca5a883.mp4","video_2_relative_path":"videos/3d2ee827d8bbaf81.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/movie/movie_1/example.json::00000018","text_prompt":"A cinematic maritime sequence opens with a wide-angle tracking shot, bathed in soft golden-hour backlighting that casts long reflections across the open ocean and frames a massive, dark-hulled submarine as a high-contrast silhouette against the luminous horizon. The camera pans slowly from right to left, tracking alongside the vessel as it powers steadily forward, carving through the swells. White foam trails behind the bow and along the flanks, emphasizing active propulsion, while the hull reveals crisp details: the white numerals \"458\" stenciled near the conning tower, a stylized triangular emblem with horizontal stripes toward the prow, and faint linear patterns running the length of the dark metal. Sunlight glints off the wet surfaces as the stern gradually recedes from view, leaving the frame dominated by the vessel’s imposing scale and angular geometry.\n\nBeneath this sweeping visual progression, a dramatic orchestral score swells, anchored by sustained low brass and rolling timpani that establish a tense, cinematic pulse. Higher strings enter with a staccato ostinato, soon joined by French horns weaving an ascending melodic fragment that builds steadily without ever resolving. Layered seamlessly beneath the music is the immersive, open-air soundscape of the sea: the deep, broadband rumble of hull displacement, sharp transient splashes as the bow lifts over breaking waves, and periodic gurgling as air escapes near the conning tower. The aquatic textures are mixed slightly lower than the orchestration but remain vividly present, grounding the epic tension in physical reality. With no voices, alarms, or mechanical clanks to interrupt the atmosphere, the scene closes mid-motion, leaving both the visual trajectory and the musical crescendo suspended in a state of suspenseful, unspoken anticipation.","video_1_relative_path":"videos/e3d8ef90d33e812d.mp4","video_2_relative_path":"videos/11e55f259c7c09f7.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/movie/movie_1/example.json::00000046","text_prompt":"A cinematic war drama unfolds in a stark, snow-covered battlefield at the edge of dusk, captured through a static high-angle wide shot that establishes a palette of icy blues, muted greys, and the warm, flickering orange of small fires atop a netted wooden structure. In the foreground, soldiers clad in heavy winter camouflage crouch behind a snowbank, their postures rigid with anticipation; one figure in a tan hooded parka stares forward with a tense, unblinking gaze, while dozens of dark metal barrels are stacked in disciplined rows behind them. A low, ominous orchestral score immediately takes hold, weaving sustained strings and deep percussion into the cold ambient air, building a palpable sense of dread. Suddenly, the frame is shattered by a chaotic close-up as a massive explosion erupts at the center, a blinding cascade of orange and yellow fire that engulfs the lens. Cylindrical barrels and debris fly outward in slow motion, while sparks and embers streak through thick, roiling smoke against a violently shaking camera. The audio swells into a deafening, multi-layered detonation—a sharp initial crack followed by a rolling, bass-heavy rumble that momentarily drowns out the score and shakes the very ground.\n\nAs the shockwave passes, the view pulls back to a low-angle wide shot across the frozen field, now dominated by the wooden structure fully ablaze. Towering flames paint the night sky in an intense, hellish orange glow, while thick plumes of black and grey smoke rise vertically, interspersed with falling sparks and the scattered remains of toppled barrels in the foreground snow. The camera holds steady, emphasizing the sheer scale of the devastation as the audio transitions into a sustained, roaring fire crackling alongside the lingering echoes of the blast and the returning tension of the orchestral strings. The focus returns to the soldiers bracing against the aftershocks behind their snowbank cover; some shield their faces or cover their ears, their expressions fractured by shock and urgency. A central figure, wearing a fur-lined ushanka and a thick scarf, stares ahead with a soot-smudged face, his sharp intake of breath barely audible over the fading roar of the flames and the settling of debris. The orchestral music swells to a final, resonant peak, leaving the battlefield bathed in the hazy, dangerous glow of the inferno.","video_1_relative_path":"videos/5ec3168205db148b.mp4","video_2_relative_path":"videos/93a06ec575cb807e.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/movie/movie_1/example.json::00000051","text_prompt":"A cinematic wartime sequence opens with a close-up, slightly low-angle shot of a soldier in heavy winter military gear, his face and uniform dusted with frost. The lighting is dim and warm-toned, casting the glow of nearby firelight across his tense, wide-eyed expression and slightly parted lips, while a blurred background of smoke and debris hints at impending danger. A deep, ominous orchestral drone immediately underscores the moment, with low strings and brass swelling beneath a faint wind-like ambience to establish a foreboding mood. The perspective sharply cuts to a high-angle aerial view as a massive explosion engulfs a bunker complex, bright orange and yellow flames roaring outward and sending thick plumes of dark smoke skyward. Wooden beams and metal fragments tear through the air as a thunderous concussive boom dominates the soundscape, layered with crackling fire, shattering materials, and percussive orchestral hits that sync precisely with each expanding fireball.\n\nThe camera drops to a ground-level perspective, capturing multiple simultaneous detonations across the facility as fireballs illuminate the night with dynamic shadows and swirling ash. Structural elements collapse inward and blow apart while the camera pans slightly left to follow the trajectory of the largest blast. The audio design intensifies into overlapping layers of sustained low-frequency rumbles, mid-range crashes, and high-pitched whines from flying debris, while the orchestral score reaches its peak with rapid string ostinatos and cymbal crashes reinforcing the visual devastation. The viewpoint then pulls back to a sweeping wide aerial shot, revealing the full scale of the destruction: several buildings ablaze along a snow-covered ridge, connected by parallel pipelines, with a central structure erupting into a towering mushroom-shaped fire cloud against a dark, cloudy sky. The cold blues and greys of the winter landscape starkly contrast with the violent oranges and reds of the inferno.\n\nAs the visual spectacle holds steady, the initial roar gradually recedes into distant rumbling and the intermittent pops of burning material. The orchestral score sustains a tense, lingering chord before softening, leaving only the ambient wind and residual crackle of fire to underscore the aftermath. The absence of dialogue focuses entirely on sensory immersion, weaving tight synchronization between the meticulously crafted sound effects and the sweeping cinematography to convey a visceral reality of urgency, peril, and catastrophic loss.","video_1_relative_path":"videos/b396a56a8aa3f703.mp4","video_2_relative_path":"videos/7b6dfd3281450910.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/movie/movie_1/example.json::00000070","text_prompt":"A desaturated, industrial sci-fi scene opens with a low-angle medium shot inside a vast, dimly lit hangar bay washed in cold greys and blues. Sparse overhead strip lighting cuts through the gloom, casting sharp shadows across the metallic joints and hydraulic hoses of a massive, articulated grey mech standing on the left. In the foreground right, a muscular operator sits in a motorized exosuit chair, clad in a faded grey t-shirt, dark suspenders, cargo pants, and a clear-face respirator helmet tethered by purple hoses. He gazes upward with a neutral expression as the mech lowers its right arm toward him, accompanied by a heavy metallic clank and a deep, continuous mechanical hum that fills the cavernous space. As the camera begins a slow pan to the right, tracking the operator’s subtle movements, the ambient soundscape layers faint electronic beeps, shifting metal, and distant footsteps. The operator turns his head further right, revealing tattoos along his neck and bicep, while the background opens to show the rear ramp of a large aircraft where soldiers in camouflage uniforms move purposefully around equipment.\n\nOverlapping the industrial drone, a gruff, off-screen male voice cuts through with a sharp, cautionary tone in Mandarin, stating, “当心点，笨蛋。” The camera completes its pan, framing the operator’s profile against the bright, misty daylight pouring through the hangar opening, where silhouettes of trees and distant vehicles fade into the overcast sky. He settles into his seat, hands resting lightly on the controls, as a deeper, reflective male voice begins to speak in Mandarin, completing the thought with, “可是在这里他们成了不可阻挡的力量。” The atmosphere remains tense yet subdued, grounded entirely by spatial reverb, hydraulic hisses, and restrained breathing, with no music to distract from the gritty, technological realism of the moment.","video_1_relative_path":"videos/13c9bb866b158279.mp4","video_2_relative_path":"videos/fd8c1c3f5811183c.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/movie/movie_1/example.json::00000094","text_prompt":"A gritty, high-contrast industrial thriller unfolds inside a vast, multi-level factory swallowed by thick smoke and flickering orange-amber firelight. Shot with a handheld, kinetic lens, the camera tracks a man in dark work clothes sprinting up a steel staircase, his boots clanging sharply against the grating. As he reaches the landing, he launches himself over a railing, twisting mid-air for momentum while a deep, resonant explosion erupts below, showering the space with sparks and debris. The soundscape is thick with a high-pitched mechanical whine, rhythmic metallic impacts, and the heavy scrape of dragging steel, all underscored by a constant low-frequency hum of struggling machinery.\n\nThe perspective shifts to a low-angle vantage beneath the railing, revealing a hard-hatted worker clutching a clipboard as he watches the runner land awkwardly on the upper walkway. The fugitive immediately regains his balance and sprints toward the far edge, while fiery bursts behind him cast long, dancing shadows across the steel beams. The audio swells with layered grinding, rhythmic clanks, and a rising electronic tone signaling imminent structural failure, punctuated by the crackle of burning materials. Suddenly, the frame catches a third figure—a young man in a tan jacket and collared shirt—leaning precariously over a lower railing, his knuckles white as he grips the bar, eyes wide with panic and mouth open in a silent, desperate shout.\n\nAs faint silhouettes move against glowing embers above, the soundscape peaks with a piercing screech, a heavy structural thud, and the chaotic scatter of falling rubble. Violent smoke swirls through the space, reducing visibility and amplifying the raw, visceral exertion of the scene: strained grunts, rapid panting, and sharp exhalations cut through the diegetic chaos. The sequence closes on this breathless tableau of urgency and danger, where dramatic lighting, rapid visual shifts, and an immersive wall of mechanical distress and physical strain forge a cohesive atmosphere of imminent collapse.","video_1_relative_path":"videos/eec1a0e402e6d56a.mp4","video_2_relative_path":"videos/acfa555e0ba4ed59.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/movie/movie_2/example.json::00000042","text_prompt":"A high-stakes aerial combat sequence opens on a dramatic low-angle close-up, framed in cool, desaturated blues and grays with the occasional orange flash of distant explosions. The camera, mounted near the fuselage, captures the metallic sheen of a sleek gray fighter jet’s wing slicing through a turbulent, overcast sky. A hard cut transitions to an exterior tracking shot as the aircraft banks sharply right, its agility emphasized against dense, rolling clouds. Bright yellow-orange flares erupt from the wings in a wide fan, leaving luminous trails that cut through the muted atmosphere. The soundscape layers a sharp, stereo-panned tracer whoosh and rapid mechanical whirring beneath a rising electronic score of pulsing synth bass and staccato percussion.\n\nThe perspective shifts inside the cockpit for a tight close-up of the pilot. Clad in a dark flight suit and oxygen mask, his helmet bears bold white lettering reading “WHISKEY.” He grips the control stick with visible tension, his eyes locked forward and faintly reflected in the visor. Outside the canopy, blurred clouds rush past, reinforcing the aircraft’s blistering speed, while inside, the ambient engine hum blends with the swelling music and rhythmic radar beeps. Pulling back to an aerial wide shot, the frame reveals two jets maneuvering in formation above a vast cloud layer. One aircraft releases a dense barrage of flares, weaving a glowing web of light against the darkening sky, while the second dives steeply, trailing thick black smoke that curls dramatically in its wake. The camera continues to retreat, showcasing the sheer scale of the engagement and the chaotic interplay of light, motion, and weather. The soundtrack reaches a cinematic crescendo, layering driving drums, deep sub-bass, and immersive engine roars with the sharp crack of flares, propelling the sequence forward with urgent, visceral momentum.","video_1_relative_path":"videos/3063c6f9631b4bb7.mp4","video_2_relative_path":"videos/a261d99bb72198bd.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/movie/movie_3/example.json::00000016","text_prompt":"A sweeping cinematic aerial shot captures a vast, forested mountain range at the golden hour, where a low sun sits just right of center, casting a warm orange glow that silhouettes successive ridges fading into misty layers. A pronounced reddish-orange lens flare with green and purple streaks stretches diagonally across the frame, partially veiling the treetops below. The camera glides forward in a slow, smooth dolly while tilting slightly upward, revealing undulating terrain and valley fog without ever revealing human figures, animals, or structures. Atmospheric haze softens the edges of the foreground trees as the light subtly intensifies near the sun, establishing a contemplative and awe-inspiring natural tableau.\n\nBeneath this silent landscape, a non-diegetic soundscape dominates the mix, beginning with a deep, resonant synthesized drone that swells gently to establish a somber, cinematic foundation. Immediately following, a single male voice enters with a sustained, high-register vocalization, singing \"Sondaa, a long resonant cry that echoes into the distance,\" delivered with pronounced vibrato and a slightly strained, ritualistic timbre. Both the drone and the vocal line are drenched in cavernous, large-hall reverb, creating an expansive ethereal space that fills the stereo field evenly. The vocal phrase holds steady without lyrical development, harmonizing with the constant drone until the sequence naturally resolves into a lingering, atmospheric hum that leaves the viewer suspended in anticipation.","video_1_relative_path":"videos/46f341ff97439825.mp4","video_2_relative_path":"videos/22914d94a96638ef.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/movie/movie_4/example.json::00000003","text_prompt":"Cinematic disaster sequence, shot with a large-format lens and dramatic, high-contrast lighting. The scene opens in an extreme close-up, almost macro perspective, capturing a massive, turbulent plume of dark grey and black smoke billowing upward. The texture is violently chaotic, with swirling eddies and glowing orange embers flickering deep within the cloud, hinting at intense heat at its core. Small, indistinct fragments of building materials hang suspended in the updraft, while harsh lighting carves the smoke’s edges against a bright, out-of-focus background. A deafening, low-frequency roar immediately floods the soundscape, rapidly escalating in volume and layered with sharp, high-pitched cracks that echo shattering concrete and glass. The audio swells in perfect synchronization with the violent visual expansion before the camera abruptly cuts to a high-angle, wide aerial view. From this vantage, the source of the devastation is laid bare: a towering skyscraper in the heart of a dense, modern city grid is actively collapsing from its midsection outward. A colossal column of thick grey smoke erupts vertically from the impact zone, while bright orange flames lick from multiple floors, illuminating a cascading waterfall of dust, rubble, and twisted metal that widens into a crater on the street below. The surrounding metropolis remains eerily static, with intact adjacent buildings and distant traffic flowing normally, completely unaware of the chaos above. The soundscape mirrors this scale, sustained by a deep, resonant, and continuous roaring rumble punctuated by intermittent, thunderous booms as massive structural sections crash down, dominating the audio with no music or speech to distract from the raw destruction.\n\nThe camera holds its static, elevated position as the immediate violence of the collapse gradually subsides. The central tower is now reduced to a smoldering ruin, still exhaling a steady stream of dark smoke that drifts slowly into the sky. A fine haze of dust hangs heavily over the intersection, gradually obscuring the lower levels of the wreckage and the street beneath it, while the bright orange glow of the fires dims but remains visible through the gaps in the debris. The audio transitions to a lower-intensity phase, characterized by a persistent, heavy structural rumble and the softer, granular patter of settling rubble raining down. Though the overall volume decreases, the atmosphere remains thick with tension and ominous weight, sustained by the lingering acoustic energy of the event as the scene settles into a haunting stillness.","video_1_relative_path":"videos/39e978a9042da31c.mp4","video_2_relative_path":"videos/46610930066a95a2.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/movie/movie_4/example.json::00000008","text_prompt":"Cinematic electronic atmosphere, static low-angle shot under a stadium roof at night. Dominating the upper edge is a dark horizontal beam bearing the illuminated word “ETIHAD” in bold white sans-serif capitals, positioned slightly right of center alongside a glowing black-and-white checkered flag motif. Beneath this architectural canopy hangs a rectangular lighting rig featuring two vertical columns of four circular lamps each, flanked by angular white trusses that catch faint ambient highlights against the deep black sky. The scene unfolds in silence as the left column ignites sequentially, each lamp bursting into a warm amber glow with instantaneous, uniform brightness, while the right column remains shrouded in darkness, creating a stark vertical bar of light that contrasts vividly with the unlit half and the surrounding negative space. The visual stillness is matched by a meticulously crafted, non-diegetic soundscape that suspends time in a sleek, technologically precise atmosphere. A continuous low-frequency electronic drone forms the foundation, layered with a steady mid-tempo percussive pulse at approximately one hundred twenty beats per minute that mimics a synthetic heartbeat. Over this rhythm, a bright arpeggiated synthesizer motif cycles in rapid, staccato bursts, treated with moderate digital reverb to evoke a vast, virtual expanse. The mix remains clean and spacious, entirely devoid of environmental ambience, crowd noise, or mechanical clicks, ensuring that the silent activation of each bulb feels abstract and mood-driven rather than literal. Together, the rhythmic illumination and hypnotic electronic score cultivate a sense of latent energy and grand anticipation, perfectly poised to introduce a major spectacle.","video_1_relative_path":"videos/4dc60d8d8778afe0.mp4","video_2_relative_path":"videos/ee0a103b37b9ab1f.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/movie/movie_4/example.json::00000048","text_prompt":"Cinematic realism, wide-angle to medium lens, low-angle opening that slowly pulls back and pans right. The scene opens on a desolate stretch of highway vanishing toward the horizon, its dry, cracked asphalt etched with faint tire marks beneath a pale, hazy sky. From the left edge of the frame, the front wheel of a heavily modified motorcycle glides slowly into view, revealing intricate mechanical details like exposed gears, chrome spokes, and complex piping. As the camera eases backward and pans right, the full profile emerges: a rugged engine block, sweeping exhaust pipes, and weathered handlebars gleaming under harsh natural sunlight. A rider clad in dark clothing and gloves sits astride the machine, posture relaxed yet coiled with readiness, anchoring the composition in a quiet moment of anticipation.\n\nThe soundscape grounds the image in raw mechanical realism. A deep, rhythmic chugging from a large-displacement engine idles at a steady, low pitch, punctuated by subtle metallic rattles as loose components vibrate against their mounts. A faint, dry wind whispers across the open terrain, carrying no echo and reinforcing the isolation of the setting. As the front wheel rolls forward, a crisp metallic clank syncs with its contact against the pavement, followed by a barely perceptible rise in engine RPM as the rider’s gloved hand tightens its grip on the handlebars. The ambient tension builds without musical accompaniment or dialogue, leaving only the persistent hum of the idle engine and the whisper of the wind to underscore a mood that is both contemplative and charged with imminent motion.","video_1_relative_path":"videos/5642594a4273276b.mp4","video_2_relative_path":"videos/275030bf0dc75e11.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/movie/movie_5/example.json::00000041","text_prompt":"Cinematic wide shot, desolate reddish-brown Martian landscape under a hazy orange sky, lit by diffuse, alien daylight. In the foreground, two silver metal crutches lean against each other in the sand on the left, while to the right, a complex tangle of green metallic tubes and mechanical components lies toppled on its side. Behind this wreckage, partially buried in a low ridge of dirt, rests a large spherical habitat module capped with a reflective gold dome and marked by a red band near its base. The terrain stretches into vast, flat plains that lead toward distant, layered rock formations. The entire scene remains utterly motionless, with no wind or shifting debris to disturb the stillness.\n\nOver this silent tableau plays a single, unrelenting sound: a high-pitched, metronomic electronic beep that mimics a medical heart monitor alarm. Each sharp, synthetic pulse cuts through an otherwise acoustically dead environment, devoid of wind, rustling, or atmospheric hum. The clinical rhythm persists without variation in pitch or volume, creating a stark contrast between the frozen visual abandonment and the insistent, eerie urgency of the alert. The mood settles into a suspenseful solitude, where the relentless beep underscores themes of isolation, mechanical failure, and fragile survival on an alien world.","video_1_relative_path":"videos/cd32eb6e005ff9b3.mp4","video_2_relative_path":"videos/be6c02d448eb76e1.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/movie/movie_6/example.json::00000019","text_prompt":"Set in a dimly lit, futuristic control corridor defined by padded white walls and exposed industrial piping, the scene is captured through a static low-angle wide shot that emphasizes sterile white surfaces, matte black machinery, and high-contrast blue monitor glow against crimson indicator pulses. Four vertically stacked screens on the left wall display steady blue waveforms and data readouts, while a console panel beneath them pulses with rhythmic red and blue lights. From the center-right background, a solitary figure in a dark long-sleeved jumpsuit descends a short metal ladder with deliberate control, gripping the rails before stepping onto the floor. He moves forward to a vertical wall panel featuring three illuminated red buttons and extends his right hand to press the topmost one with firm certainty. As his finger makes contact, a sharp metallic click rings out, immediately followed by a brief, rising electronic whine that suggests a heavy relay engaging or a power surge activating. Throughout the sequence, a deep, continuous low-frequency mechanical hum fills the acoustic space, grounding the environment in the steady thrum of ship engines or industrial ventilation. The monitors cast soft blue reflections across the room as the data graphs remain static, and the man holds his position facing the panel, motionless. The atmosphere remains tense and subdued, defined by stillness, precise industrial design, and the weight of a single, consequential action in an automated, echoing chamber.","video_1_relative_path":"videos/6f2cc87e2bc09e91.mp4","video_2_relative_path":"videos/b52366bd3d2def00.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/movie/movie_6/example.json::00000036","text_prompt":"Shot with a handheld lens in the style of a gritty wartime thriller, the sequence opens inside a dimly lit wooden hut at night. Warm, flickering firelight paints the rough timber walls in deep oranges and smoky grays, casting dynamic shadows as a faint, low orchestral drone begins to underscore the tension. A hooded soldier stands in the foreground, aiming a bolt-action rifle toward the right, while a rapid cut thrusts us into a close-up of a bearded comrade in a helmet and heavy wool coat. His face is strained and urgent as he unleashes a sharp, aggressive yell that cuts through the swelling strings. The camera pans slightly to follow another soldier sprinting leftward past a burning barrel, sparks flying as he vanishes into the smoke, while the muffled crunch of boots on snow begins to bleed into the mix.\n\nThe perspective shifts abruptly outdoors into a snowy courtyard surrounded by wooden buildings, where chaotic combat erupts in a storm of muzzle flashes and overlapping gunfire. One soldier fires his rifle, the flash briefly illuminating his face before a nearby comrade is struck and recoils backward, blood splattering against the wall. The orchestral score swells with percussive hits synchronized to each crack of a shot, while a dense auditory wall of weapon reports, wind hiss, and a sharp metallic clang of ejected casings fills the air. A soldier in a tan overcoat sprints directly toward the camera before veering right, the handheld frame shaking violently to amplify the disorientation. Finally, the action settles on two soot-stained soldiers crouching beside a large artillery piece mounted on sled runners; one works the breech while the other braces himself, both glancing upward anxiously as distant explosions rumble off-screen. The music reaches a dramatic crescendo before cutting out abruptly, leaving only the fading echo of battle sounds and the cold winter wind.","video_1_relative_path":"videos/734430ebf8244b3e.mp4","video_2_relative_path":"videos/7416562342a231fa.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/movie/movie_6/example.json::00000038","text_prompt":"The scene opens in a dimly lit industrial interior bathed in deep teal and cyan light, evoking a submerged or subterranean facility. A static medium close-up frames the right side of the composition, holding on a man with short, dark curly hair and stubble, wearing a black tank top that reveals a dirt-smudged left shoulder. He sits slumped forward, resting his chin heavily on his right hand, his eyes closed and posture radiating profound exhaustion and despair. To the left, metallic machinery anchors the foreground, featuring two prominent vertical green cylinders mounted on a steel frame, while blurred equipment behind them glows with a faint red indicator. Through a large viewport in the background, a dark aquatic environment stretches outward, filled with suspended particulate matter drifting slowly in the ambient glow. A shallow, weary exhalation breaks the silence, followed by a constant low-frequency mechanical hum that vibrates through the enclosed metallic space, layered with faint watery whooshes suggesting external ocean pressure. Over this somber bed, a slow-tempo orchestral score of sustained high-register strings in a minor key enters softly, swelling gently in volume. As the melancholic music sustains its mournful tone, the man’s lips part slightly and a strained, breathy male voice whispers, \"Please no,\" his delivery trembling with quiet resignation. The camera remains fixed, capturing only the subtle tightening of his expression and the endless drift of particles outside the glass, leaving the moment suspended in unresolved tension.","video_1_relative_path":"videos/ede49498cd32833e.mp4","video_2_relative_path":"videos/9f332f1518797903.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_1/example.json::00000088","text_prompt":"A cinematic medium two-shot establishes a warmly lit contemporary café blending modern and traditional Chinese décor, where earthy brown wood tones contrast with the cool blue of a hanging noren curtain. A young East-Asian man in a brown crew-neck sweater sits at the counter, while an East-Asian woman in a dark textured blazer stands opposite him, a black wallet held at her waist. Behind them, stainless-steel appliances and a green QR-code payment stand sit beside a glass of amber liquid and a stack of pink banknotes. Bathed in warm key illumination, the man leans forward with wide eyes and an open mouth, his tone light yet incredulous as he states, \"That's a bit much.\" A calm, neutral female Mandarin voice follows as the woman looks down briefly before raising her gaze, explaining, \"Besides the food cost, there is your delivery fee.\" The scene remains quiet, anchored only by a faint indoor room tone.\n\nA straight cut shifts to an over-the-shoulder close-up of the man, the blurred outline of the woman’s shoulder occupying the near left edge to emphasize depth. His surprise melts into a broad, toothy smile and a brief, amused chuckle, his eyebrows lifting playfully as he inhales softly before responding with a friendly, mildly apologetic tone, \"Our shop doesn't do take-out.\" The lighting continues to bathe the wooden surfaces in rich warmth while the cool backdrop maintains visual separation, reinforcing a cozy yet contemporary mood. The shot holds steady on his good-natured expression, capturing the lighthearted negotiation and leaving the conversational moment open-ended, inviting the viewer to sense the unspoken familiarity between customer and staff.","video_1_relative_path":"videos/405243d6852375a1.mp4","video_2_relative_path":"videos/7f0d75a75e7bb340.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_10/example.json::00000051","text_prompt":"Cinematic scene, static medium shot from inside a small open-topped boat gliding along a quiet canal under soft, overcast daylight that casts even, shadow-free illumination across a palette of warm earth tones. On the left sits a young man in a dark grey blazer over an unbuttoned white shirt; on the right, a young woman with shoulder-length wavy blonde hair wears a black sleeveless top with lace trim and rests a brown shoulder bag on her lap. Behind them, a stone embankment rises with green trees, yellow lounge chairs, and a distant artist at an easel, while a large white passenger ferry rests moored further downriver. The camera holds steady without cuts or zooms as the boat rocks gently, visible only through subtle shifts in the water against the hull.\n\nA young man with a casual North American accent begins, asking, \"What, what? You laughing at me?\" A young woman with a bright, neutral tone replies, \"No.\" He continues, grinning broadly and gesturing lightly near his chest, his tone carrying playful self-deprecation as he asks, \"Does my situation sound pathetic?\" She responds with mock seriousness, raising an eyebrow and leaning forward slightly, before teasing, \"Which monastery lets monks have sex?\" He concedes with good humor, flashing a quick peace sign with two fingers while chuckling, and completes his thought naturally: \"Okay, all right, you’re right. I’m doing better than most monks.\" Her laughter softens into a warm nod, and both settle into relaxed, familiar postures. The audio relies entirely on crisp, close-miked dialogue layered over barely perceptible river ambience—distant water lapping, a faint breeze rustling foliage, and the occasional soft fabric rustle or negligible hull creak—allowing their nuanced vocal performances to drive the intimate, spontaneous exchange without any musical score or crowd noise.","video_1_relative_path":"videos/ada5fa050c49bb16.mp4","video_2_relative_path":"videos/9a4560c8a7c47672.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_10/example.json::00000068","text_prompt":"Cinematic slice of everyday realism, captured in a single locked-off medium-wide shot with a standard lens, the scene opens in a quiet clinic lobby bathed in soft, even overhead illumination that renders pastel walls, deep blue carpeting, and beige upholstered seating in natural, neutral tones. A black decorative wall panel with swirling white motifs anchors the background beside a slim glass table holding a small potted plant with yellow blossoms. Three young adults enter briskly from the left: a woman in a cream polka-dot blouse and black trousers carries a patterned handbag while holding hands with a man in a white graphic tee and blue jeans, followed closely by a companion in a purple-and-grey zip-up hoodie. Their soft, rhythmic footsteps echo on the hard flooring beneath a low, steady ambient hum as they halt near an off-screen reception desk. The leading man turns slightly, his posture relaxed yet attentive, and a clear, courteous male Mandarin voice asks, \"哎你好，请问欧阳医生在吗？\" An off-screen female voice, calm and professional, replies, \"哦，欧阳医生在里面呢。\" He nods, murmuring in a polite Mandarin tone, \"好，谢谢。\" while his companions exchange subtle glances and slight head turns. The man in the hoodie then leans in, glancing sideways at his friends with a light, teasing inflection, and a playful male Mandarin voice adds, \"这个欧阳医生一定很帅吧？\" The camera remains entirely static throughout, preserving spatial continuity and grounding the moment in unobtrusive, naturalistic sound design where crisp dialogue and faint fabric rustles sit cleanly above the ambient bed, capturing a candid slice of friendship and routine medical visitation without a single cut or musical cue.","video_1_relative_path":"videos/af8a85cfc75daeb8.mp4","video_2_relative_path":"videos/5c79857d60cbd079.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_10/example.json::00000098","text_prompt":"Cinematic wide shot, harsh midday sunlight, warm earth-tone palette against a clear blue sky. A beige recreational vehicle with red-and-yellow stripes sits motionless in the background with its side door ajar, while in the mid-ground, a man in a light-blue full-body protective suit and purple shoe covers slumps forward in a blue-and-white checkered camping chair, his right elbow resting on his knee as his hand supports his forehead in exhaustion. Beside him lie a dark duffel bag and a small silver foil packet, hinting at clandestine work. Standing nearby in a dark beanie, dark jacket, and bright yellow long-sleeved shirt, a younger man faces him with a loosely clenched fist at waist height. A slightly mocking North American male voice cuts through the still air: “You just crawled out of a microwave.”\n\nThe camera remains locked off as the desert heat shimmers above the dry grasses, broken only by faint insect chirps and the seated man’s slow, labored breathing. He lowers his hand from his face before pressing it back against his brow, while the standing man shifts his weight slightly, maintaining his watchful stance. After a tense pause, the standing man leans forward a fraction, his tone shifting to direct pragmatism laced with quiet concern: “You gonna be able to finish the batch?” The seated man offers no verbal reply, simply exhaling audibly and tilting his head downward with his eyes closed. The scene holds on their frozen positions under the relentless sun, the sparse diegetic soundscape of wind and insects underscoring the isolation and mounting tension of their remote operation.","video_1_relative_path":"videos/4f48c6ad50b747b7.mp4","video_2_relative_path":"videos/6cdaf898ab65e715.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_12/example.json::00000035","text_prompt":"Set against a quiet urban street at night, the scene opens on a steady medium close-up framed over a man’s right shoulder, isolating a young East-Asian woman from mid-chest upward. She wears a beige wool coat and a vividly patterned scarf in deep purple, blue, yellow, and white, her long dark-brown hair falling past her shoulders. A practical streetlamp from above-right casts gentle highlights across her face while leaving the opposite side in soft shadow, emphasizing the glisten in her eyes and the slight part of her lips. A calm, neutral female Mandarin voice begins, speaking in a soft, slightly breathy tone tinged with concern, stating \"您放心。\" The shallow depth of field blurs the background into circular bokeh city lights, with a dark sedan parked just behind her left shoulder, while a barely audible low-frequency urban hum and soft wind-like rumble underscore the intimate atmosphere.\n\nA straight cut reverses the perspective to an over-the-shoulder shot from behind the woman, centering on an older East-Asian man with short black hair graying at the temples and a neat goatee. Dressed in a black turtleneck beneath a dark, subtly textured jacket, he leans forward slightly, his brow furrowed and gaze fixed intently on her. A calm, protective male Mandarin voice delivers his response in a measured, low-pitched baritone with deliberate pacing: \"这事你就不用再管了，回去好好休息。\" The ambient night sounds remain constant, blending distant traffic hush with the quiet tension of the exchange, while the pronounced bokeh continues to separate the pair from the abstract urban nightscape.\n\nThe camera returns to the original angle, holding steady on the woman as her expression tightens, brows lifting and eyes widening in quiet confusion and hurt. A confused, plaintive female Mandarin voice follows, asking softly but insistently, \"为什么？\" The frame lingers on her troubled face, the muted earth tones of their clothing punctuated only by her colorful scarf, drawing the viewer’s focus entirely to her micro-expressions. With no camera movement and minimal ambient sound, the classic shot-reverse-shot grammar emphasizes the emotional gravity of the moment, leaving the scene suspended in a hushed, dramatic stillness.","video_1_relative_path":"videos/0d4f7533ae09ee49.mp4","video_2_relative_path":"videos/d0b327f460923090.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_12/example.json::00000072","text_prompt":"The scene opens in a dim, stone-walled chamber that evokes a medieval castle or wizarding academy hall, bathed in warm directional light from camera-left that contrasts with cool bluish backlight spilling through tall arched windows. A shallow depth of field isolates a young woman in the foreground, dressed in a white collared shirt, maroon-and-gold striped tie, dark sweater vest, and a red velvet shoulder cape reminiscent of a classic house uniform. Her long dark-brown hair is parted with straight bangs and tied into two low pigtails. Behind her, slightly out of focus, stands a robed figure with a pale human skull for a head, while a bronze winged statue rests on a tripod to the far right. A brief, bright burst of audience laughter fades into a hushed room tone as Student A, a young adult female speaking in standard Mandarin with a lively, slightly anxious timbre, begins, \"如果你说的这些基础我都没有，但是我会一点点乘法口诀，有希望吗？\" As she speaks, she raises her right hand near her chin, pinching her thumb and forefinger together to emphasize her words, her eyebrows lifting and eyes widening as a tentative smile breaks across her face, conveying a blend of self-deprecation and hopeful humor.\n\nA hard cut shifts the frame to a new medium shot, maintaining the same lighting palette, color design, and shallow focus. Now centered is Student C, a young adult male in an identical uniform, his round wire-rim glasses catching the warm light as he offers a warm, reassuring smile. To his left, Student D, a female student with long wavy brown hair, stands with her arms folded, watching him with a neutral, mildly skeptical expression. The skull-headed figure and bronze statue remain quietly anchored in the background, preserving the whimsical yet slightly ominous atmosphere. Student C, a young adult male speaking in standard Mandarin with a calm and reassuring tone, answers crisply, \"有。\" The static camera holds the moment, letting the brisk conversational rhythm and richly textured fantasy backdrop deliver the scene’s comedic punch before the frame ends.","video_1_relative_path":"videos/993b1fcef8c667ac.mp4","video_2_relative_path":"videos/838d6dd79fa573c2.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_2/example.json::00000004","text_prompt":"A cinematic medium-wide shot, eye-level and sharply focused, establishes a brightly lit science classroom bathed in even, cool fluorescent light that casts minimal shadows across a muted palette of grays, blacks, beiges, and pastel poster hues. Along the back wall, a black countertop sits beneath a large bulletin board plastered with student science projects, including clearly legible titles like “Gynecomastia” and “Nasty Teeth.” Standing before the counter is a bald, middle-aged man in a black bomber jacket layered over a rust-colored knit sweater and white collared shirt. He faces slightly right toward a colleague whose back is to the camera; the second man, wearing a light-gray diamond-patterned cable-knit sweater and beige trousers with glasses perched on his head, leans over the counter, quietly arranging small items. A low, steady HVAC hum fills the otherwise silent room as the bald man begins speaking in a calm, measured tone, stating, “Well, I had some questions I wanted to run by you, work-related.” His expression remains serious, brows faintly knitted, while the colleague continues his task without turning. After a brief pause, the bald man’s voice softens with mild concern, raising his left hand from his pocket in a tentative, open-palmed gesture as he asks, “Oh, you feeling okay?” The camera holds its static framing on the unresponded question and the quiet laboratory atmosphere until the scene fades.","video_1_relative_path":"videos/468bebdb9f343c22.mp4","video_2_relative_path":"videos/61d41a0ad879ccae.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_2/example.json::00000046","text_prompt":"A cinematic wide shot, fixed camera, soft daylight filtering through closed horizontal blinds casting pale stripes across teal walls and a tiled floor inside a hospital infusion center. The composition is arranged in a shallow diagonal, where five patients rest in dark reclining chairs beneath a large white banner bearing the words HOPE, FAITH, COURAGE, and PEACE. IV poles with yellow fluid bags rise behind the seating, and idle monitors sit on metal carts nearby. In the foreground, a woman in a tan jacket reads a magazine with a calm but weary expression, while beside her, an older woman in a beige sweater and patterned headscarf knits blue yarn, her gaze fixed downward. Slightly further back, a man in glasses and a light striped shirt watches the right side of the room, where a blonde woman in a pale-blue cardigan sits upright, hands folded, her eyes glistening with unshed tears. An empty black rolling chair rests at the extreme edge of the frame, and the entire scene is steeped in a hushed, contemplative atmosphere, underscored by a low room tone and the faint hum of climate control.\n\nAn off-screen male voice begins, his tone gentle and tinged with vulnerability, stating \"You know, actually, it wouldn’t make me feel a little better knowing that you were there when you were going through your own treatment.\" The utterance trails off into a quiet pause, leaving only the soft HVAC hum to fill the silence. As his words linger, the knitting needles of the woman beside the reader still for a moment, the magazine in the foreground lowers slightly, and the blonde woman’s expression tightens with the weight of memory. The camera remains completely still, holding the tableau of shared endurance and quiet resilience without a single cut or fade, allowing the muted palette and even lighting to emphasize the profound, unspoken solidarity of the space.","video_1_relative_path":"videos/75c089e18a981927.mp4","video_2_relative_path":"videos/3596731f363ac9fe.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_2/example.json::00000061","text_prompt":"A contemplative character-driven drama opens with a single continuous medium tracking shot at eye level, gliding along a paved path bordered by dense green shrubs and small trees. Soft, diffuse daylight filtered through the foliage bathes the scene in warm, slightly golden tones, casting gentle highlights and minimal shadows while a shallow depth of field isolates the two subjects against a softly blurred background of a modern white building with large windows and a metal railing. The man, on the left in a dark-grey blazer over an open-neck white shirt, gestures with both hands as he speaks in a calm, reflective manner, while the woman, on the right in a black sleeveless top with ruffled straps, light denim shorts, and a brown cross-body bag, rests her left hand on her hip and turns her head toward him with eyebrows raised in mild surprise. A low, steady city-traffic hum underlies the soundtrack, grounding the intimate atmosphere without any music or wind.\n\nAs the camera maintains a smooth, consistent push-in, the foliage sways almost imperceptibly in a light breeze. A calm, reflective male voice begins, stating, \"Few things that happen to us change our disposition.\" The woman responds with a curious, slightly surprised tone, \"Really, you believe that?\" He answers thoughtfully, palms opening outward for emphasis, \"I think so. I read this study where they followed people who’d won the lottery and people who’d become paraplegic.\" The quiet exchange unfolds against the muted greens of the vegetation and the neutral greys of the architecture, preserving a contemplative mood that explores themes of human resilience and emotional constancy through natural blocking and subtle expressions.","video_1_relative_path":"videos/d0cd252b73ec4f6d.mp4","video_2_relative_path":"videos/55404f5eea61ff50.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_2/example.json::00000084","text_prompt":"A contemporary web-sketch comedy scene opens on a brightly lit interior resembling a modern living-room or balcony, captured by a locked-off medium-wide camera at eye level. Soft, even illumination from a white-framed glass door blends with diffused fill lighting to create a vivid, saturated color palette that enhances the playful mood. Three young East Asian adults sit side-by-side on a low bench against a reddish-pink wall. On the left, a man in a light-blue plaid suit, white shirt, and navy tie dotted with red holds an open palmful of small dark snacks. In the center, a woman with a high ponytail wears a red-and-white varsity jacket adorned with colorful patches, including a blue \"LIFE\" label and a yellow smiley \"HAPPY\" emblem, over a white T-shirt while clutching a yellow snack packet. To her right, a woman with long wavy blonde-highlighted hair and a pink off-the-shoulder top grips a red-and-white striped popcorn box. A fourth person’s light-green-sleeved arm rests partially visible at the frame’s edge. The room is quiet save for a faint indoor room tone and a brief burst of canned laughter that quickly fades. A concerned, clear female Mandarin voice leans forward and states, \"你还没有找到工作？\" (\"You still haven't found a job?\").\n\nWithout a cut, a frustrated, energetic male Mandarin voice exhales and replies, \"那些面试太难了，技能证书、工作经验我都没有。\" (\"Those interviews are too hard; I don't have skill certificates or work experience.\") while gesturing with his free hand and flicking crumbs from his palm. The two women listen intently, the center woman’s mouth falling half-open in surprise while the woman on the right’s eyes widen and her lips part slightly. The same male voice continues with exaggerated emphasis, briefly pointing upward for comic effect as he adds, \"就好像张伟去酒吧泡妞，两眼一抹黑。\" (\"It's like Zhang Wei going to a bar to pick up girls—completely clueless.\"). The physical comedy peaks as the center woman’s jaw drops further and the woman on the right’s eyes bulge comically. A second short wave of bright, synthetic canned laughter swells to underscore the punchline before fading out. The camera holds steady on the trio, frozen in their exaggerated expressions, capturing the synchronized, stage-like intimacy typical of contemporary web-sketch comedy.","video_1_relative_path":"videos/f0e0167ec0f33be0.mp4","video_2_relative_path":"videos/792ac22dd5238b7b.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_3/example.json::00000002","text_prompt":"A dim, cluttered laboratory or workshop opens in a wide shot, where dusty shafts of light pierce the darkness from high windows and an unseen lamp, illuminating shelves crammed with glass beakers, flasks, jars, cardboard boxes, metal drums, and assorted mechanical parts. A long horizontal condenser tube glints at centre frame. Low-key lighting with strong chiaroscuro carves pockets of brightness from deep shadows, while suspended dust motes add texture to the industrial grit. In the mid-ground, a young man with spiky blond hair sits hunched over a wooden workbench, shoulders slumped and head lowered as though lost in thought, his dark jacket revealing a vivid red lining against the earth-toned surroundings of browns, grays, and muted tans. The scene is quiet, sustained only by a faint natural room tone. A taller figure enters from the left rear and walks toward the seated boy, dressed in a tan hooded parka, dark trousers, and a striped knit beanie. As he approaches, he breaks into a broad smile, leans forward, and rests his hands casually on his hips while gazing down. An excited adult male voice with a North American accent rings out, stating \"You are Willy Wonka and I got the golden ticket!\" with a bright, triumphant lilt. The camera begins a slow pan rightward, drifting slightly closer while keeping both figures in frame. The standing man straightens, still smiling, and lets out a short, breathy exclamation of surprised delight: \"Oh.\" The seated boy finally lifts his head, his eyes widening and mouth parting in surprise that quickly melts into delighted recognition. He looks up at the visitor, then back toward the gleaming apparatus before him, the lighting catching the metallic sheen of the condenser and scattered glassware to accentuate the workshop’s mysterious atmosphere.\n\nNo further speech follows; only the soft ambient hush of the room persists as the image holds on their expressive faces. The absence of a musical score heightens the realism, leaving the single burst of dialogue and the quiet workshop environment to create a sense of intimacy and immediacy.","video_1_relative_path":"videos/74fb18c23d03e260.mp4","video_2_relative_path":"videos/720d85e2c0a67079.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_4/example.json::00000001","text_prompt":"A modest, softly lit interior resembling a traditional Chinese study opens in a medium-close over-the-shoulder composition, isolating a young woman seated at a dark wooden table. She wears a burgundy rib-knit turtleneck beneath an off-white quilted jacket trimmed with vivid yellow-green-red paisley patterns, her long dark hair falling straight to her shoulders, while a beige handbag rests on the adjacent chair. Behind her, a pale wall and a dark-wood window frame reveal a muted courtyard and a white sink outside, all bathed in even, shadow-soft lighting that maintains a hushed, intimate atmosphere. With steady eye contact toward someone off-screen, she speaks in clear, mid-range Standard Mandarin, her voice firm yet controlled, carrying restrained frustration as she declares, \"If you refuse to care for him, Father can come with me. But before we leave, the accounts still need to be settled clearly.\"\n\nA hard cut shifts to a matching medium close-up of a young man positioned in the left foreground, his short, slightly wavy black hair and black bomber jacket layered over a white collar and red sweater blending into the room’s subdued tones. Behind him, a tall wooden bookshelf crowded with books, decorative objects, two small grey elephant figurines, and a red-bound folder bearing a gold star emblem anchors the personal space. The shallow depth of field keeps the focus tightly on his face as his gaze drops briefly before lifting toward her, signaling reluctant engagement. After a tense silence that allows the bare room tone to carry the weight of the confrontation, he replies in a lower, exasperated tone, his rhetorical intonation edged with irritation: \"Don't you think you are being childish?\" The camera remains completely static throughout, the absence of music or ambient sound amplifying the dramatic tension as the exchange hangs unresolved.","video_1_relative_path":"videos/56588c44ed8aaaf8.mp4","video_2_relative_path":"videos/2550ad70ee38f039.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_4/example.json::00000003","text_prompt":"A moody domestic drama unfolds in a dimly lit living room at night, captured on a 35mm lens with a shallow depth of field. Warm interior tungsten lighting contrasts with cool exterior darkness, casting muted earth tones across the space. A middle-aged East Asian man in a dark-gray suit, crisp white shirt, and black tie sits alone on a mustard-yellow leather armchair positioned slightly right of center. Soft key-light from camera-left highlights his furrowed brow as he clasps and unclasps his hands in a restrained gesture. Behind him, a clothes-drying rack, a side table with a framed photograph, and a glimpse into a domestic kitchen with a white refrigerator and glass cabinet establish a lived-in, somber atmosphere. A weary, low-pitched male Mandarin voice carries through the quiet room as he speaks, stating \"那名誉变成这样，那我们大家不都是都有责任吗？\". The room holds only a faint ambient tone, amplifying his isolation.\n\nA straight cut shifts to a wider over-the-shoulder shot from behind the older man, revealing two younger relatives seated on a gray sofa opposite him. On the left, a young woman in her early twenties with short hair and bangs, dressed entirely in black, sits with hunched shoulders and downcast eyes, her moist gaze and shallow breathing conveying quiet sorrow. Beside her, a young man in his late twenties or early thirties, wearing a black suit with a loosely tied tie, leans forward with his elbows on his knees, his expression a mix of restrained frustration and weary resolve. Between them rest patterned cushions, while a memorial arrangement of a framed portrait, white flowers, and candles on a nearby sideboard underscores the recent bereavement hanging over the family. A calm but firm male Mandarin voice, edged with restrained frustration, addresses him: \"行了，大哥，你做你的好人。\". The camera remains static, allowing the micro-expressions and the heavy silence to carry the narrative weight, leaving a palpable tension suspended in the quiet room as the scene fades.","video_1_relative_path":"videos/9611749ccf940b8a.mp4","video_2_relative_path":"videos/3b8c370fb5bbf1e6.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_4/example.json::00000017","text_prompt":"A nocturnal urban drama unfolds through a static exterior frontal view framed by the windshield of a stationary red Jeep-like SUV, captured with a moderate depth of field that softens the drifting city lights outside. Cool blue and purple streetlight tints the scene, contrasting with the crisp white glow of an overhead LED bar that washes over the dashboard and occupants. Inside, a man in a black leather jacket and pale collared shirt sits behind the wheel, his left hand resting on the steering wheel, while a woman in a beige blazer and high-necked white ruffled blouse occupies the passenger seat, both securely belted. A low, continuous engine hum fills the cabin as the man turns slightly toward her, his voice calm and lightly upbeat: “找个地方庆祝一下，吃顿好的。”\n\nA hard cut shifts to a locked-off medium close-up from the passenger side, tightening the frame on their faces and emphasizing the woman’s restrained posture. As the man finishes his suggestion, her expression tightens—brows knitting and lips pressing together—before she glances down and shifts her weight, accompanied by a soft rustle of fabric. Outside the windows, blurred city lights drift past in the background, confirming they remain caught in stationary traffic. Suddenly, the woman lifts her gaze, eyes widening with irritation, and asks sharply: “你怎么回事啊？” The man turns back toward her with mild puzzlement, replying: “怎么了？”\n\nLeaning fractionally forward, her voice grows firmer and accusatory as she presses: “昨天晚上咱们怎么定的规划你忘了？” The confined space and shallow depth of field isolate their micro-expressions against a softly blurred backdrop, while the deep reds of the interior clash with the cool nocturnal palette to heighten the emotional tension. With no music or external noise to distract, the quiet cabin and minimal soundscape focus entirely on the rhythm of their exchange, capturing a pivotal moment of relational friction where a celebratory invitation quickly unravels into quiet reproach.","video_1_relative_path":"videos/1151e11bafdf1c4b.mp4","video_2_relative_path":"videos/cb43dfd92d245553.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_4/example.json::00000018","text_prompt":"A nostalgic small-town Americana scene opens in a brightly lit, open-front automotive repair shop, shot with a smooth tracking camera and a warm earth-tone palette accented by saturated blues and reds. Bathed in high-contrast natural daylight streaming through the garage door, a medium shot frames a light-colored vintage car with its hood propped open. Beside the engine bay stand a heavyset customer in a white polo with blue stripes and light jeans, hands resting on his hips, and a tall mechanic named Herschel, clad in a dark-blue jumpsuit over a tan turtleneck, his oval name tag pinned to his chest. The workspace is detailed with stacked tires, tool-lined shelves, a yellow oil drum, and a red toolbox. Under a faint low hum of distant traffic and the occasional soft clink of metal, Herschel speaks in a calm, slightly gravelly voice with a mild Southern inflection, explaining, \"In fact, it's got one hundred thirty thousand miles on it.\"\n\nAs he turns and walks toward the sun-drenched doorway, the camera pans right, tracking his movement and widening the frame to spill onto the street. A weather-worn wooden sign leaning against the façade advertises tires and used cars in hand-painted block letters, while a turquoise pickup and silver sedan rest under leafy trees near a beige single-story building. Herschel’s tone shifts to mild concern as he continues, \"She been running hot. I'm worried,\" his pitch rising slightly on the word hot. The customer follows partway outside, still frowning at the vehicle, until the camera settles into a looser composition that captures all three figures. A young curly-haired boy in a blue long-sleeved shirt with a red chest stripe has just appeared behind the customer, his wide eyes darting between the adults with quiet curiosity. Natural daylight evenly illuminates their faces while a shallow depth of field softly blurs the parked cars and foliage behind them. The mechanic finishes his thought, and the scene closes on the quiet atmosphere, punctuated only by a brief metallic clank echoing from deeper within the shop.","video_1_relative_path":"videos/fd47a3e001e867eb.mp4","video_2_relative_path":"videos/af6b548e33fa2014.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_4/example.json::00000021","text_prompt":"A nostalgic, dialogue-driven scene opens on a medium two-shot inside a retro American diner, bathed in warm, late-afternoon sunlight that slices through horizontal blinds. The palette leans into saturated reds from the vinyl booth upholstery and muted browns of the wooden table, which is cluttered with half-eaten plates, a white coffee cup on a saucer, a glass soda bottle, chrome condiment holders, and a napkin dispenser. A woman with short, layered reddish-blonde hair, wearing a dark long-sleeved top and a chunky silver necklace, leans forward across the table, pointing her right index finger as she speaks. A calm, skeptical female voice with a North American accent begins, stating, \"This place? A coffee shop?\" Her tone is incredulous yet measured, cutting through the low-level diner ambience of soft cutlery clinks, distant chatter, and a subdued HVAC hum.\n\nA straight cut shifts to a medium close-up of the woman, where sunlight rakes across her face, casting soft highlights and gentle shadow stripes from the blinds. She holds her gaze off-screen, lips pursed in mild disbelief, as the restaurant murmur continues uninterrupted. The frame then switches to a matching medium close-up of the man opposite her. He has slicked-back blond hair, light stubble, and wears an open, brightly patterned short-sleeve shirt over a black T-shirt. Raising both hands slightly with palms up, cigarette still pinched between his fingers, he responds in a mid-range, lightly accented British voice: \"What's wrong with that? Nobody ever robs restaurants. Why not?\" As he speaks, he gestures outward before relaxing into a subtle smirk. The camera remains entirely static, utilizing a moderate depth of field that keeps both subjects sharply focused while the rows of empty booths and potted plants behind them soften into a gentle blur. The intimate, dialogue-driven rhythm and the contrast between her quiet skepticism and his casual bravado linger in the warm, nostalgic atmosphere as the scene concludes.","video_1_relative_path":"videos/9d41fa378d66adcb.mp4","video_2_relative_path":"videos/e0921630c06a4e65.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_4/example.json::00000052","text_prompt":"A quiet, naturalistic domestic scene unfolds in a brightly lit dining room, captured through restrained, static camera work that favors medium close-ups, over-the-shoulder wides, and intimate profile shots. Diffuse daylight streams through a rear glass sliding door, rimming the characters in soft highlights and revealing a sunlit balcony with hanging laundry and potted plants in the background. The color palette leans into muted earth tones—browns, greys, and blacks—contrasted by a pale patterned tablecloth and the warm glow of morning light, establishing a cozy, everyday atmosphere. At a light-colored square table, a young East Asian man in his early thirties, wearing a brown turtleneck, sits holding a small white steamed bun, turning it gently between his fingers as he speaks. Two blurred shoulders frame the foreground, hinting at unseen companions, while behind him, a pale wooden shelving unit displays framed photos, dark wine bottles, and a vase of pink flowers. A calm, warm male voice with a gentle Northern Mandarin accent begins, stating, \"Before I leave for America, Lili and I will raise her nice and plump.\" He briefly glances up toward the others before returning his gaze to the food.\n\nThe camera shifts to an over-the-shoulder wide shot, revealing all three diners sharing the meal. On the left, the young man continues eating. In the middle, a man in his late thirties wearing a grey-brown sweater over a collared shirt smiles encouragingly, lifting a spoonful of soup from a small white bowl. To the right, an older man in his late fifties, dressed in a black sleeveless puffer vest over a dark long-sleeved shirt, eats steadily with chopsticks. The table holds plates of yellow scrambled eggs, additional buns, and individual bowls. As the young man’s sentence finishes off-screen, the middle-aged man responds cheerfully, adding with a light chuckle, \"The local baozi are still the best.\" The older man answers with a soft, thoughtful \"Mhm,\" acknowledging the comment while continuing to chew. The scene transitions to a closer profile of the older man, where sunlight catches the lines of his face and emphasizes his calm satisfaction. He lowers his chopsticks, takes a bite, and murmurs in a low, reflective tone, \"Tomorrow morning.\" Faint clinks of ceramic against chopsticks, muted chewing sounds, and a gentle room tone carry the quiet mealtime moment to its close, with no music or artificial effects to distract from the naturalistic intimacy of the scene.","video_1_relative_path":"videos/e31706d98ba77a07.mp4","video_2_relative_path":"videos/bb9876fbb9f0dd5d.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_4/example.json::00000077","text_prompt":"A single static medium close-up, framed from a slightly low angle, captures the interior of a moving passenger car during the day, bathed in soft, even daylight that renders the scene in desaturated, cool tones. Beige leather seats anchor the composition, while a gray-blue denim jacket on the driver and an olive-green collared shirt on the passenger establish a grounded, realistic palette. Through the side windows, blurred greenery and passing traffic streak horizontally, confirming steady speed, while a continuous bed of low-frequency engine rumble, mid-band tire hiss, and light wind rush fills the cabin. The older male passenger in the left seat sits with his eyes closed and head tilted back, breathing in slow, heavy cycles, while the younger driver keeps his gaze fixed forward, hands gripping the wheel, brow faintly furrowed, and jaw set.\n\nA short sigh breaks the quiet as the passenger exhales and begins to speak. A raspy, older male voice in northern Mandarin, calm at first but quickly tightening with exasperation, states: “不是你烦人不烦人呢你说你啊.” His eyebrows knit and nostrils flare as his pitch and volume rise, prompting the driver to widen his eyes and part his lips in a silent, startled reaction. The passenger continues without pause, rapidly repeating the syllable “叨” five times with clipped, staccato emphasis, his lips pursing and releasing in quick succession. “叨叨叨叨叨跟家庭妇女似的,” the same voice adds, the sharp repetition cutting through the steady road noise and mirroring the rhythmic tension in his face. The driver remains frozen in place, mouth slightly agape and head tilted fractionally toward the cabin, processing the comment without a verbal response. As the passenger finishes speaking, his facial muscles relax and he leans back against the seat, while the driver’s expression softens only marginally, the ambient hum of the engine and the hiss of tires carrying the scene to its quiet conclusion.","video_1_relative_path":"videos/3f5d4876e4d486c7.mp4","video_2_relative_path":"videos/95d11ead6c65678c.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_4/example.json::00000087","text_prompt":"A sitcom-style scene opens on a static medium two-shot, framed at eye level with a shallow depth of field that keeps a tall, dark-wood bookcase and a small stereo receiver softly blurred in the background. Warm, even three-point lighting and a palette of deep browns, muted greens, and neutral greys highlight the subjects in the foreground: two musicians seated at close distance. On the left, a woman in her thirties with shoulder-length curly brown hair and black-rimmed glasses wears a red top beneath a zip-up hoodie patterned with large yellow-green flowers, holding a violin upright in her lap with the bow resting across the strings. Opposite her, a man of similar age, also wearing black-rimmed glasses, a dark jacket, and a silver-cased wristwatch, cradles a full-size cello whose rich reddish-brown varnish catches the soft key light. She looks directly at him with an intent yet playfully teasing expression, and a lively, slightly sardonic female voice begins, stating, \"I thought I saw your pupils dilate when you looked at her, which, unless you’re a heroin addict, points to sexual attraction.\" As her final words land, a brief burst of canned studio laughter swells beneath the dialogue, peaking naturally before fading into the quiet room. The man remains silent, his hands relaxed on the instrument’s neck and body, offering only a faint, knowing smile as the camera holds steady, letting the warm tones of the polished wood and the subtle comedic pause linger in the air.","video_1_relative_path":"videos/7893fdf0d4d4726e.mp4","video_2_relative_path":"videos/059a8dac79f7652f.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_4/example.json::00000090","text_prompt":"A sketch-comedy scene in a brightly lit television studio unfolds in a locked-off eye-level medium two-shot, bathed in even high-key illumination that eliminates harsh shadows and highlights a vibrant palette of magenta geometric panels, warm brown brick textures, and an orange beaded curtain to the right. The composition balances cool and warm tones, emphasizing a comedic contrast between a young man in a crisp light-blue suit and an older man seated beside him in a camouflage bucket hat adorned with a yellow pom-pom and a dangling red cord, paired with a green short-sleeved shirt and white trousers. The suited man stands camera-left, leaning forward with a genial smile, his left hand resting lightly on the older man’s shoulder as he begins to speak. The seated man grips a translucent plastic bucket with red handles, inside which rests a large, flat, reddish-brown sheet resembling cured jerky. Looking up, the older man raises a free hand toward the bucket and replies in a polite, slightly weary Mandarin tone, stating, \"不用麻烦了，我自己拿就好。\"\n\nThe suited man maintains eye contact and a friendly demeanor, his tone shifting as he continues the exchange. The older man shakes his head once, keeping the bucket steady, and offers a firm yet courteous response. The conversation then pivots back to the younger man, who adopts a mock-serious expression, eyebrows raised and voice rising slightly for emphasis. He stresses a hypothetical consequence while keeping his hand firmly on the older man’s shoulder, declaring in a playful yet earnest Mandarin voice, \"哎，不行，如果你逃走的话，就没有人来跟我们签五十年的合约了。\" The older man listens attentively, his eyes widening briefly before settling into a neutral, resigned look. Throughout the sequence, the camera remains completely static, the controlled studio environment stays perfectly still, and the quiet room is filled only by the clear, well-articulated voices of the two performers, capturing the precise, sketch-comedy atmosphere of the set.","video_1_relative_path":"videos/b894c58cf298d8f4.mp4","video_2_relative_path":"videos/23c01c606b5a46be.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_5/example.json::00000000","text_prompt":"A slice-of-life scene opens on a static, eye-level medium-wide shot inside a Japanese high-school classroom, bathed in soft, diffuse daylight streaming from a curtained window on the right and supplemented by neutral overhead fluorescents. The composition holds two male students in black gakuran uniforms near the front: a tall boy with short dark curls stands with hands on his hips, leaning slightly forward toward a seated classmate with wavy blond hair who is quietly unwrapping a brown-paper lunch parcel on a wooden desk. Behind them, a blue-green chalkboard displays scattered handwritten notices and colorful magnets, while a grey metal cabinet nearby holds hardcover textbooks with gold lettering on their spines. The standing student, speaking in a casual, boastful Japanese tone, states, \"自分より喧嘩強い人はさん付けっす。\" Faint indoor ambience fills the space as the seated boy remains focused on his meal, his concentration unbroken.\n\nThe standing boy straightens up, glances briefly toward the lens, and turns back with a half-shrug and a thoughtful frown, his playful confidence softening into mild hesitation as he murmurs in Japanese, \"うーん、あの、ちょっと…\" He then regains his composure, leaning closer and lowering his voice to a conspiratorial register. With a serious expression, he states, \"外に何人か女が待ってます。\" At this, the blond student pauses his unwrapping, lifting his eyes for a fleeting moment before returning to his lunch. In the extreme left foreground, the motionless back of a third student's head anchors the frame, while the camera holds steady on the quiet exchange, emphasizing the subtle shift in social dynamics through the standing boy's micro-expressions and the muted palette of dark uniforms, warm wood, and soft classroom tones.","video_1_relative_path":"videos/1b7e6b2e4cb986ff.mp4","video_2_relative_path":"videos/6d720cfe3c7d6fe1.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_5/example.json::00000054","text_prompt":"A static, eye-level medium shot frames the interior of a small, sun-drenched hair salon, bathed in high-key natural daylight filtering through sheer white curtains. The bright, airy composition is anchored by dominant whites and blues, accented by warm wood flooring and a white heat lamp dotted with green. Through the large window behind the subjects, a parked bicycle and faint greenery establish a quiet street outside, while a black octagonal wall clock reads just past ten and a reversed “SALE” poster clings to the glass door. In the foreground sits a young man with a straight bowl-cut, wearing a blue-and-white zip-up jacket over a white T-shirt. Behind him stands an older Japanese hairdresser in a short-sleeved white uniform, his hands resting gently on the customer’s shoulders. A calm, polite Japanese male voice in his mid-forties with a standard Tokyo accent leans forward and asks, “何にします？”\n\nThe young customer suddenly lifts his head, eyes widening and mouth opening in sudden determination. He shouts energetically, “よーし、行くぜ！” As his voice rings out, a burst of upbeat rock music driven by distorted electric guitar, bass, and drums fades in, injecting a playful, high-energy comedic rhythm into the scene. Without pausing, he leans forward, gesturing emphatically with his right hand while his voice remains loud and enthusiastic, declaring, “金髪にしてバリバリのパーマかけてください！” The brisk rock backing track sustains its tempo beneath the dialogue. The hairdresser’s expression shifts from mild shock to amused disbelief, his eyes widening and mouth parting slightly as he holds his steady posture. The locked-off camera captures the entire exchange without movement, letting the exaggerated, humorous climax of the flamboyant request play out against the deliberately silent, low-noise salon environment before the scene cuts abruptly to black.","video_1_relative_path":"videos/b5d8c01d2ad0626c.mp4","video_2_relative_path":"videos/6bcd9bf21663d196.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_5/example.json::00000062","text_prompt":"A static, medium-wide cinematic shot captures a casual tech-review unboxing set against a pure-black backdrop, illuminated by dual soft key lights that carve crisp, gentle highlights from the shadows. Two East Asian men sit behind a dark wooden table, flanked by large broadcast microphones on boom arms. On the left, a host in his early thirties wears a white hoodie with a multicolored apple-like logo and clear-frame glasses; on the right, a co-host in his late twenties sports a black-and-tan geometric-striped sweater, a black “NY” cap, and thin-rimmed glasses. The tabletop is neatly arranged with a face-down smartphone, three beverage cans, a small silver ring, and a light-grey rectangular box stamped with blue “RAY-BAN” lettering.\n\nThe scene unfolds in a single unbroken take. The left host smiles broadly, turning toward his companion who is already leaning over the Ray-Ban box, fingers tracing its edge. A lively male Mandarin voice begins, stating “视频也玩你的梗。” while both men share a light chuckle. The left host raises both hands, palms open, leaning forward with a teasing yet good-natured cadence as he continues, “因为我跟摄影师说这是我独享的moment。” The right host grins but remains quiet, his attention fixed on the packaging. He lifts the lid to reveal a crisp white interior, his eyes widening with mild excitement as the left host lowers his hands, still smiling. Finishing the thought with a friendly cadence, the left host concludes, “然后就观众有一波互动，哎。” The camera holds steady, capturing the relaxed, humorous atmosphere of the exchange as their soft overlapping laughter fades into the quiet studio space.","video_1_relative_path":"videos/2be4107c7c62187f.mp4","video_2_relative_path":"videos/858171d0be33ffab.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_6/example.json::00000003","text_prompt":"A tense institutional drama unfolds in a static wide shot framed through a doorway into a high-tech operations center, where cool bluish-grey lighting and rows of dark grey cubicles establish a sterile, authoritative atmosphere. Roughly two dozen staff members in business suits and uniforms stand shoulder-to-shoulder facing forward, their expressions intent and alert. Dominating the background is a wall of large monitors glowing cyan and white, displaying maps, graphs, and scrolling data that reinforce the crisis-control environment. A bearded man with glasses, wearing a light shirt beneath a dark vest, stands slightly left of center with an upright posture. He addresses the room in firm, measured Cantonese, stating, \"你知唔知我有權力即刻解除你職務？\" The space falls silent save for a faint, low electronic hum from the equipment, while the assembled listeners remain perfectly still, absorbing his authoritative statement.\n\nA hard cut shifts to an over-the-shoulder medium close-up, isolating a woman with straight, chin-length black hair and a maroon short-sleeved top. She faces the bearded man, whose back is now visible on the right edge. Her brow is slightly furrowed, lips parted in controlled resolve. In a calm yet challenging Cantonese tone, she replies, \"我知，C P 同 D C P 都有咁嘅權力.\" Her steady, slightly higher-pitched voice matches his firmness, her locked gaze signaling confrontation rather than submission. A shallow depth of field softly blurs the surrounding staff and glowing screens, keeping the focus entirely on her determined expression. The ambient hum persists as the scene holds on her unwavering stare, leaving the tense power struggle unresolved.","video_1_relative_path":"videos/ba1dc904a3c14197.mp4","video_2_relative_path":"videos/ea231106e515f03f.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_6/example.json::00000065","text_prompt":"A warm, sitcom-style medium shot framed at chest height captures a cozy apartment hallway bathed in soft amber tungsten light from a square wooden sconce, the palette favoring neutral cream walls and exposed brick to let the costume colors pop. Occupying the left third of the frame is a light-skinned man in his early thirties wearing a light-blue T-shirt layered over a dark long-sleeved shirt, the chest emblazoned with a distressed red-and-yellow “S” shield. He speaks with rapid, energetic enthusiasm, his hands held slightly apart as if measuring invisible space, before lifting his right hand in a sharp forward thrust to illustrate a dive. To his right stands a mid-thirties man with short dark hair and black-rimmed glasses, dressed in a brown zip-up jacket over a black T-shirt featuring a green molecular diagram; he initially looks down with lips pressed together, then raises his gaze toward the speaker, his brows knitting in mild skepticism. Further back, a third man with curly dark hair, wearing a royal-blue blazer over a white collared shirt and a dark-green sweater vest patterned with red motifs, watches with quiet curiosity.\n\nThe camera remains completely still in a single unbroken take, keeping the focus tightly on the performance and the clean, dialogue-only audio track. The narrator’s clear, fast American English voice cuts through the quiet space without music or ambient noise, stating, “Falling, accelerating at an initial rate of 32 feet per second per second.” His eyebrows rise for emphasis as he continues, “Superman swoops down to save her by reaching out two arms of steel.” The scene holds on this moment, the restrained body language of the listeners underscoring their roles as engaged but silent observers against the muted interior backdrop.","video_1_relative_path":"videos/343a39ea49642b97.mp4","video_2_relative_path":"videos/fa568e1497d16be4.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_6/example.json::00000080","text_prompt":"A warmly lit, mid-century suburban dining room bathed in soft household light that casts golden highlights on skin tones and reflective surfaces, rendered in a shallow depth of field with a palette of muted greens, browns, and creams. The scene opens on a static medium two-shot framing two boys seated side-by-side at the left edge of a dinner table. The older boy, an East-Asian child in a dark-green polo, turns his gaze toward someone off-camera to his right and speaks in a clear, polite mid-range voice: \"Vietnamese, sir.\" Beside him, a younger light-skinned boy in a light-beige patterned shirt sits upright, eyes fixed on the speaker with a neutral but attentive expression. Behind them, a wooden sideboard displays a white vase with dried flowers, a framed black-and-white photograph, and a green ceramic bowl, while plaid curtains and sheer drapes frame a window, establishing an intimate, domestic atmosphere.\n\nThe camera cuts to an over-the-shoulder medium shot from behind the boys, revealing a middle-aged Caucasian man in a cream-and-white striped short-sleeve shirt seated opposite them. He lifts a textured amber glass, smiles amiably, and replies in a relaxed, conversational tone with a mild Midwestern accent: \"Sure. You know, I spent a little time over there.\" As he speaks, his gold wedding band and metal wristwatch catch the warm lamplight. Without breaking his posture, the man adds a single, matter-of-fact word—\"Army.\"—while giving a small nod, his tone shifting to something friendly yet authoritative. After a brief pause, the man lowers his glass, leans forward a fraction, and asks with gentle curiosity: \"Your mom’s name isn’t Kim Lee, is it?\" His intonation rises at the end, signaling a quiet question. Both boys remain perfectly still, faces composed, as the scene holds on their silent reactions. The audio remains clean and studio-quality, stripping away background noise to focus entirely on the spoken words and subtle facial shifts, leaving the conversation suspended in the warm, intimate atmosphere.","video_1_relative_path":"videos/eb89b80c05eda367.mp4","video_2_relative_path":"videos/69a0a690497908cb.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_6/example.json::00000090","text_prompt":"A widescreen cinematic shot opens in a dimly lit modern office at night, bathed in cool bluish ambient light spilling from a large window behind the subject. The camera holds a medium close-up on an East Asian man in a dark-grey textured suit, crisp white shirt, and burgundy dotted tie, his brown hair softly waved and a faint mustache accentuating his contemplative expression. Soft key light from camera left models his face while gentle shadows fall across his opposite cheek. Leaning slightly forward, he gazes toward someone off-screen to his right, his brow furrowing and lips parting as anxiety tightens his features. Against a backdrop of a blurred city nightscape glowing with warm bokeh and an out-of-focus leafy plant, a low, hesitant male Mandarin voice begins, stating \"Hey, are you saying this means you're trying to force me out?\" The quiet room is underscored by a barely audible ambient hum.\n\nA straight cut shifts to a matching medium shot of an East Asian woman seated upright in a black mesh office chair behind a dark desk, her long dark-brown hair falling over her shoulders. She wears a tailored black blazer over a vividly colored scarf of purple, red, yellow, and green, her arms folded across her torso as she turns her gaze toward the man just out of frame on her left. Even neutral overhead lighting preserves her natural skin tones while a shallow depth of field keeps her sharply focused against softly blurred office accessories, including colorful file holders, a small framed photograph, and a glossy red ceramic pot. Her eyes widen and brows raise in serious, restrained attention before she finally responds. In a calm yet firm Mandarin voice, she delivers a measured confirmation with a slight downward inflection that conveys certainty tinged with regret, stating \"That is exactly what he means.\" As her eyes narrow fractionally and her mouth closes into a composed line, the static framing and cool blue-grey color grading punctuated by selective warm accents reinforce the tense, intimate atmosphere of a quiet workplace confrontation. The ambient hum persists as both characters fall silent, the shallow depth of field and subdued lighting amplifying the gravity of the moment before the scene holds.","video_1_relative_path":"videos/4b72418f8cae7c12.mp4","video_2_relative_path":"videos/356d59fa78e39e02.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_7/example.json::00000013","text_prompt":"Captured in a static medium close-up with warm, even interior lighting and a shallow depth of field, the scene opens in a lively party setting that sharply isolates Sheldon Cooper and Leonard Hofstadter against a softly blurred backdrop of costumed guests in teal, blue, yellow, and silver. Sheldon, fair-skinned with short brown hair and clad in a black-and-white vertically striped turtleneck, sits upright with his right forearm resting on the teal armrest, his posture leaning slightly forward as he addresses someone off-camera to his right. Leonard, recognizable by his curly brown hair, black-rimmed glasses, olive-green jacket, and brown vest, faces him attentively, nodding once as the faint, low-level murmur of the crowd establishes the casual social atmosphere. Sheldon begins speaking in a clear, analytical tone, stating: \"It seems that the newcomer approaches the existing group with the greeting, 'How wasted am I?'\" He maintains earnest eye contact with Leonard, his eyebrows lifting for emphasis as he continues without pause. Leonard’s lips part slightly, ready to respond, while the background figures remain still, their vivid costumes adding festive visual texture to the scene.\n\nAs Sheldon delivers his next line, his pitch rises slightly on the quoted phrase with confident timing, continuing: \"Which is met with an approving chorus of 'Dude.'\" The moment his words land, a brief burst of overlapping male laughter and enthusiastic exclamations rises from off-screen, punctuating the joke and reinforcing the comedic rhythm. The ambient crowd murmur persists beneath the exchange, keeping the audio clean and grounded as the shot holds steady, capturing the contrast between Sheldon’s precise, observant narration and the relaxed, jovial energy of the gathering.","video_1_relative_path":"videos/f4e0e60c9af18b26.mp4","video_2_relative_path":"videos/6a858b60fc8c192a.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_7/example.json::00000082","text_prompt":"Cinematic domestic drama, shot on a 35mm lens with shallow depth of field, bathed in soft natural daylight and neutral color grading that lends an authentic, everyday realism. The scene opens inside a bright, modern apartment kitchen, framed from behind a wooden shelf that partially obscures the left edge to add compositional depth. Daylight streams through a large window in the background, illuminating white cabinetry and light wood countertops. A young woman stands at the counter in a medium shot, wearing a thick, fuzzy argyle sweater in red, grey, and white, a delicate gold necklace, and her dark hair pulled back. Her focused, slightly anxious expression and knitted brows convey earnest worry as she speaks in Mandarin, her lips moving clearly while she occasionally glances toward a man just out of full view on her left. Subtle household ambience, soft room tone, and the occasional faint clink of utensils underscore the quiet intimacy of the moment. A concerned female Mandarin voice begins, stating, \"我说这事咱们是不是得管管呀？万一爸以后在钱上面出了什么问题的话，咱们就说不清楚了。\"\n\nA straight cut shifts to a medium close-up of the man now fully visible beside open shelving stocked with glass jars of snacks and condiments, beneath a sleek black range hood. Wearing a textured red sweater with a darker maroon band across the chest, he listens intently, his short black hair neatly styled and his eyes fixed on her off-screen. Soft natural lighting casts gentle shadows that highlight the contours of his face, maintaining the scene's restrained, realistic mood. After a brief, resigned pause, a weary yet firm male Mandarin voice responds: \"怎么管？脾气这么大。\" The camera remains static, emphasizing the personal weight of their exchange against the softly blurred domestic backdrop, leaving the quiet kitchen atmosphere to linger on his contemplative expression as the underlying tension of familial duty and generational friction hangs in the air.","video_1_relative_path":"videos/ca90c720e62a00c2.mp4","video_2_relative_path":"videos/8fcf8642e1530e80.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_7/example.json::00000089","text_prompt":"Cinematic domestic drama, shot with a 35mm lens in soft, even daylight against a neutral grey-and-white palette. The scene opens on a medium close-up bathed in gentle morning light, revealing a young man in light-blue pajamas patterned with cartoon animals and the phrase “TERSE THE SPORTER.” He stands slightly angled to the right, his brows raised and lips parted in a mix of surprise and mild exasperation as he turns toward a partially visible older man at the frame’s edge. In the quiet domestic space, underscored only by a faint indoor hum, he blurts out, “I guessed it.” The camera then cuts to a wider static master shot that reveals the full living room: a grey sofa, a glass-panelled door, a wall crowded with framed family photographs, and a large red Chinese knot hanging beside the entrance. Between the characters sits a black wheeled suitcase topped with a duffel bag, hinting at recent travel or an imminent departure.\n\nThree figures now share the frame: the pajama-clad young man, a young woman in distressed blue jeans and a loose white sweatshirt reading “NOT YOUR FUTURE / YOUR ARRIVAL,” and the older man in a dark zip-up jacket over a brown shirt. The older man gestures warmly toward the kitchen and says, “Well then, let’s have breakfast.” The young woman smiles brightly, nods, and says, “Mhm.” Without breaking the static composition, the young man pivots slightly, extending his right arm in a sweeping, welcoming gesture and says, “Let’s have breakfast.” The older man nods, adjusts his jacket, and begins to turn toward the kitchen entrance.\n\nMaintaining the same framing, the young man repeats the invitation twice more in quick succession with a playful, rising insistence, saying, “Breakfast, breakfast.” The young woman laughs lightly, glancing between the two men, while the older man steps partially out of frame toward the kitchen. The scene closes on the trio poised to move, the ambient soundscape remaining minimal and intimate, driven entirely by their voices and the quiet rhythm of a casual family morning.","video_1_relative_path":"videos/65911611484e8cfb.mp4","video_2_relative_path":"videos/17348062e00f6fc9.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_8/example.json::00000033","text_prompt":"Cinematic drama, widescreen aspect ratio, shallow depth of field isolating two characters against a softly blurred hillside dotted with trees and houses under a hazy sky. The scene opens on a static medium-close two-shot bathed in the soft, diffused light of an overcast late afternoon, favoring a muted palette of blues and earth tones that lends a contemplative, romantic atmosphere. A light-skinned man with short brown hair and light stubble sits frame left, wearing an open dark-blue button-down over a white crew-neck tee, his right arm resting casually behind the woman beside him. Frame right, a light-skinned woman with shoulder-length wavy reddish-brown hair faces him in profile, dressed in a pale blue V-neck sweater over a white top. The camera holds steady as the man looks toward her with a mild, attentive expression, while a faint, low-frequency environmental hum underscores the quiet ambience.\n\nA direct cut shifts to a matching reverse angle, bringing both faces more frontally into view with bare tree branches silhouetting against the bright background. The woman lifts her left hand to rest lightly along her cheek and jawline, turning slightly toward him as her lips part and brows rise in quiet curiosity. Delivered in a soft, mid-range female voice with a North American accent and a gently curious tone, she asks, \"Where are we?\" Her words cut through the subtle rustle of fabric as she shifts her posture. The camera hard cuts back to the original over-the-shoulder composition, leaving her softly out of focus in the foreground while the man remains sharply framed in the background. He offers no words, instead responding with a slight, almost imperceptible nod and a small, knowing smile that conveys quiet reassurance. The ambient hum persists at a barely noticeable level, and the absence of music keeps the focus entirely on their intimate, wordless exchange as the image holds.","video_1_relative_path":"videos/f08123595dc7a3ec.mp4","video_2_relative_path":"videos/8311fc5cb9f50f0e.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_8/example.json::00000036","text_prompt":"Cinematic family drama, static medium close-up, shallow depth of field, warm natural daylight against cool indoor ambience. The scene opens on an older East-Asian man seated beside a black metal-framed bed in a softly lit bedroom. Daylight filters through sheer white curtains and beige drapes behind him, casting gentle highlights on his face while leaving the background slightly out of focus. A green cardboard box with white markings rests on a shelf to his right. Wearing a dark navy collared shirt beneath a light brown knitted sweater vest, he leans forward a little, brows knit and eyes moist with frustration. Against a bed of faint room ambience, a firm yet weary Northern-accented Mandarin voice begins, stating, \"He stopped me from going, and he has to come back to give me an explanation.\" His tone is insistent, tinged with hurt, each clause ending with a slight downward inflection that underscores his grievance.\n\nA straight cut reveals a young East-Asian woman standing in the doorway that leads into another part of the house, the camera remaining locked off in a matching medium shot. She wears a cream wool coat over a textured blue sweater, her dark hair tied back with wispy bangs framing her face. Behind her, a red Chinese knot hangs on the wall next to a small chalkboard decorated with colorful drawings, hinting at a family-oriented setting. Bathed in cooler, flatter indoor light than the previous scene, she looks toward the unseen man with a concerned, almost pleading expression. Speaking calmly but urgently, a Standard Mandarin voice addresses him as \"Dad,\" explaining that \"our elder brother and sister-in-law are in the United States, and they are currently unreachable.\" Her measured and sympathetic delivery contrasts with his agitation, leaving the quiet tension of the unresolved conversation hanging in the still frame.","video_1_relative_path":"videos/29f40eaab9bfec47.mp4","video_2_relative_path":"videos/a88514913901eb29.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_8/example.json::00000038","text_prompt":"Cinematic fantasy sequence, static medium-wide shot, even frontal lighting against a dark, smoky teal-grey backdrop that evokes a mystical academy. Two young men stand side-by-side in identical deep-purple double-breasted blazers with white piping, grey trousers, crisp white shirts, and black-and-white diagonal-striped ties, each bearing a gold winged crest on the left breast. The bespectacled man on the left turns to his slightly taller companion, his fists loosely clenched at his sides. A firm, urgent male Mandarin voice begins, stating, “I will use our magic to bind us together, so we are never separated again.” The second man listens with wide, concerned eyes, his posture rigid, while a low, ominous electronic drone hums beneath the scene, gradually joined by faint crackling energy sounds.\n\nThe speaker finishes his sentence, and the listener nods once. A calm, resolute male Mandarin voice replies, “Agreed.” Instantly, both men pivot their torsos inward, raising their hands to chest height with elbows bent and palms facing each other, fingers splayed as if grasping an invisible force. A brilliant blue horizontal beam erupts between them, momentarily washing out the center of the frame, while a sharp crystalline chime rings out followed by rapid ascending arpeggios and a swelling whoosh. Two translucent, glowing blue circular sigils materialize around their raised hands, pulsing outward with concentric rings of light. The locked-off camera holds steady as the score swells into a dramatic orchestral-electronic flourish, layering strings, brass stabs, and percussion over the continuing bass drone. The central beam fades, leaving only the luminous circles hovering near their wrists, emitting a soft ethereal shimmer as the music sustains its peak intensity before gradually diminishing. Both performers maintain their poses, eyes focused forward, faces set in determined concentration, freezing the charged tableau as the scene concludes.","video_1_relative_path":"videos/2c94f59794918798.mp4","video_2_relative_path":"videos/3071ee8669f08835.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_8/example.json::00000067","text_prompt":"Cinematic interior drama, shot on a locked-off tripod with a 35mm lens aesthetic, bathed in soft, even overhead lighting and a neutral wall palette punctuated by vivid red festive decorations. Inside a modest apartment hallway, the camera frames a medium close-up of a young East Asian man with a short undercut, wearing a black bomber jacket with silver zippers over a brown crew-neck shirt. He stands just inside a dark reddish-brown wooden door featuring a gold peephole and ornate handle, a beige canvas tote hanging from a light-blue wall hook nearby. Against a faint room-tone hum, he raises his left hand in a polite, slightly pleading gesture and speaks in clear, standard Mandarin with a courteous urgency: “Can I please borrow your bathroom first?”\n\nA hard cut reveals a static wide view of the corridor outside an identical dark wood door marked by a red plaque reading Room 301, flanked by vertical red Spring Festival couplets and a matching horizontal banner above the frame. The walls are tiled in alternating beige and grey horizontal bands, contrasting sharply with the characters’ darker wardrobes. Two men stand before the threshold, their body language charged with unresolved tension. On the left, an older East Asian man in a dark blue zip-front jacket and olive trousers grips a green-and-silver can at waist level, his face etched with alarm. To his right, another young East Asian man in a tan utility jacket over a white collared shirt and blue jeans holds a short, pale wooden stick in his left hand, extending his right palm toward the older man’s chest in a calming yet firm gesture. He speaks rapidly and insistently in Mandarin: “No, no, listen—I’m telling you he’s just nervous.” The older man immediately interrupts, waving both open palms outward and repeating sharply, “No, no, no!” His loud, agitated voice echoes slightly in the narrow hall, underscoring the domestic festivity disrupted by interpersonal conflict. The scene holds on their tense standoff, the wooden stick hinting at latent intimidation while the can suggests everyday normalcy fractured by the confrontation, leaving the argument suspended in quiet, unresolved tension.","video_1_relative_path":"videos/e81bdfc46decbbc1.mp4","video_2_relative_path":"videos/0f4877b282af7eab.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_8/example.json::00000081","text_prompt":"Cinematic late-night talk show interview, captured in a steady medium two-shot under high-key studio illumination that evenly washes both faces while subtle rim lights separate them from a stylized, illuminated cityscape backdrop. On the left, Donald Trump sits with his hands loosely clasped in his lap, wearing a dark navy suit, white shirt, and vivid red tie accented by a small U.S.-flag lapel pin; he maintains a neutral, attentive posture. Across the curved wooden desk on the right, host Jimmy Fallon leans forward in a charcoal suit with a light blue shirt and patterned purple tie, a vintage silver microphone standing between them alongside two black ceramic mugs bearing the show’s title. Fallon begins speaking with an upbeat, conversational tone, gesturing animatedly with both hands while holding a small white cylindrical object in his right grip. “Thank you from the country, the other candidates say thank you for all the attention you’re bringing to this part,” he says, his delivery lively and expressive. He continues without pause, maintaining steady eye contact and punctuating his next question with open-palm gestures. “What was the rating? You would know the ratings,” he asks, raising his eyebrows for emphasis. Trump turns his gaze directly toward the host, inhales briefly, and interjects with a firm, measured cadence, “I do.” Fallon’s smile broadens as he nods once, then immediately reacts with playful self-mockery, his voice brightening into a teasing lilt. “Oh, I’m such an expert,” he exclaims, lifting the white prop slightly before setting it back down while chuckling softly. Trump offers a brief, approving “Yeah,” accompanied by a slight smirk, and the two share a quiet moment of mutual amusement as the locked-off camera holds the scene steady. The audio mix remains clean and dialogue-forward, with the absence of audience reaction lending the exchange an intimate, closed-set atmosphere.","video_1_relative_path":"videos/560fc7d01e9e6b40.mp4","video_2_relative_path":"videos/ecdb394afd9a4688.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_9/example.json::00000007","text_prompt":"Cinematic medium close-up, warm natural daylight streaming through large side windows of a vintage tram interior, contrasting the rich wooden paneling and chrome grab handles with the cool blue-gray tones of the passing cityscape. A young man sits with his left arm casually draped over the back of the bench behind a young woman beside him. He turns toward her, smiling broadly, and speaks in a relaxed, conversational tone, \"You don’t know Crystal? Well, I knew Crystal.\" The woman answers with a soft, amused chuckle, glancing down at her hands as the gentle sway of the carriage underscores the quiet intimacy of the moment.\n\nThe man leans fractionally closer, maintaining steady eye contact as he continues the easy banter. \"Um, is it my turn now?\" he asks with a mildly hesitant, inquisitive inflection. She lifts her gaze to meet his, offering a light smile before looking back down to fiddle with a small object between her fingers, her laughter subsiding into a quiet giggle. The ambient sound remains subdued, keeping the focus entirely on their exchange. Shifting slightly forward, he raises his eyebrows in mock seriousness, his voice carrying a playful challenge as he leans in. \"Okay, tell me something that really pisses you off.\" She listens attentively, lips parting in anticipation, while outside the red tram glides past, locking them in a moment of mutual focus and growing rapport.","video_1_relative_path":"videos/8e667f2f861e72db.mp4","video_2_relative_path":"videos/83e5f9d51a19a39b.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_9/example.json::00000041","text_prompt":"Cinematic medium two-shot, shallow depth of field, warm morning light filtering through white horizontal blinds to cast soft chiaroscuro stripes across a retro American diner booth. The red vinyl seats and round black-topped table frame a woman on the left and a man on the right. The woman, with short blond hair and bangs, wears a dark purple long-sleeved top and sits upright, cradling a white ceramic teacup in both hands. The man, in an open blue-and-white patterned short-sleeve shirt over a dark T-shirt, leans back with his left arm draped along the booth cushion, gesturing with his right as a low, steady diner hum fills the space. A gruff, slightly raspy British voice delivers an irritated, working-class line: \"They clean the place out and don't even lift a fucking finger.\" The woman lifts her cup to her lips and takes a slow sip, her eyes fixed on him.\n\nShe lowers the cup to the saucer, pauses, then raises it again for another sip before finally asking in a clear, higher-pitched General American voice tinged with quiet concern, \"Did they hurt the little girl?\" The man remains still, watching her attentively as the ambient HVAC murmur persists. He then leans forward, spreading his right palm outward in a dismissive gesture, his tone shifting to a calm but firm explanation: \"I don't know, there probably never was a little girl in the first place, and frankly, the point of the story has nothing to do with a little girl.\" The woman rests her cup back on the saucer, maintaining steady eye contact without speaking further. The camera holds its static position, preserving the symmetrical composition and the subtle wardrobe contrast between her muted purple top and his vivid tropical print, while the crisp, foregrounded dialogue and unobtrusive diegetic ambience underscore the thematic tension between his cynical skepticism and her moral worry.","video_1_relative_path":"videos/ff9b91f182f16e71.mp4","video_2_relative_path":"videos/b8fd4275b95d32d5.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_9/example.json::00000093","text_prompt":"Cinematic office drama, captured on a medium close-up lens with natural daylight dominating the frame, producing soft highlights and minimal contrast across neutral interior tones punctuated by vivid pink storage boxes and a leafy green plant. The scene opens inside a bright, modern office bathed in even illumination filtering through a large window with a half-lowered white roller blind. Framed in three-quarter profile facing right, a young East Asian man in his thirties stands with a tense yet determined posture, wearing a tan-beige suit jacket, crisp white shirt, and a dark purple striped tie. His light-brown wavy hair is neatly styled, a faint mustache–goatee blends across his jaw, and behind him an open shelving unit holds scattered papers. His brow furrows as a firm, controlled male Mandarin voice begins, stating “咱们敞开了说啊，就监理这事什么意思？” His delivery is assertive and impatient, stressing the key syllables to demand clarity, while the quiet room tone underscores his restrained intensity.\n\nA straight cut shifts to a static medium shot of an older East Asian man in his late fifties seated behind a dark wooden desk in a high-backed black leather chair. Dressed in a charcoal blazer over a light-blue collared shirt with short, greying hair, he keeps his hands clasped atop the desk, which is arranged with a closed silver laptop, a folded blue handkerchief, a brown ceramic tea canister, an ornate dark figurine, eyeglasses, a paper tray stacked with documents, and a white electric kettle. A tall green plant rises beside him, and a framed monochrome landscape hangs on the wall, all illuminated by the same soft daylight. Maintaining steady eye contact, he responds with a slightly lower, measured male Mandarin voice, speaking calmly yet defensively: “那是蒙总点的头啊，和我无关。” His slower pace and downward inflection convey resignation, while the deliberate absence of music or extraneous noise keeps the focus entirely on the tense, unspoken power dynamics of the confrontation, highlighted by subtle facial tension and professional decorum.","video_1_relative_path":"videos/784d609fc7c1effb.mp4","video_2_relative_path":"videos/9d1df3917c683d69.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/music/music_1/example.json::00000076","text_prompt":"A static medium shot captures a young red-haired street performer standing on a paved pedestrian walkway bathed in natural daylight. Soft shadows fall across his black T-shirt, which bears partially visible green and yellow lettering, and his dark athletic pants. He holds a light-colored acoustic guitar with a cutaway body, his left hand forming chords on the fretboard while his right hand alternates between steady strums and occasional fingerpicked arpeggios. A microphone on a stand is positioned just below his chin, with a smartphone clipped to it and a clear plastic donation cup resting at the base. Behind him, the modern storefront features large glass windows displaying lingerie-clad mannequins beneath bold pink signage. Pedestrians flow continuously through the background: an older woman in a black cardigan and jeans passes by, a young girl in denim shorts sprints past drinking from a can, a woman in white trousers and sunglasses crosses the frame, and a man in a grey polo shirt and sunglasses leans against the window, glancing at his phone. The framing remains completely fixed, emphasizing the contrast between the performer’s focused, intimate act and the transient rhythm of city life.\n\nThe soundscape is pristine and isolated, stripped of all ambient crowd noise, traffic, or environmental reverb. A solo steel-string acoustic guitar drives the scene at a steady tempo, delivering a simple diatonic progression with consistent dynamics. Over this clean, dry recording, a mid-range male voice with a slight rasp and a casual, conversational tone begins singing, \"She says I’m walking in a straight line.\" The vocal phrasing aligns perfectly with the rhythmic guitar accompaniment, punctuated only by subtle, barely perceptible inhalations between phrases. The overall mood remains calm and observational, capturing a moment of quiet artistic expression against the backdrop of urban anonymity.","video_1_relative_path":"videos/15f06cd447781dd9.mp4","video_2_relative_path":"videos/88ba64ef878aa6c7.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/music/music_1/example.json::00000091","text_prompt":"An intimate acoustic performance captured in a static medium shot, bathed in warm ambient light with a cozy, creatively cluttered palette. A young man with dark curly hair sits in a home music studio, wearing a plain white T-shirt and black over-ear headphones, facing slightly right toward a large condenser microphone. His eyes close intermittently as he focuses, his posture relaxed yet intent while his hands move across an acoustic guitar with a vibrant galaxy-like pattern. The background reveals a lived-in creative space: a white shelving unit holds books, notebooks, and a Darth Vader plush toy, a digital piano keyboard peeks into the left frame, and a laptop displaying a digital audio workstation rests on the right. A whiteboard on a wooden easel stands quietly in the periphery, its handwritten notes blending seamlessly into the soft shadows and gentle highlights that trace the texture of his shirt and the glossy finish of his instrument. The camera remains completely still, holding a steady composition that captures every subtle shift in his expression and weight.\n\nSonically, the scene unfolds as a solo acoustic ballad. A soft, breathy male tenor voice carries a gentle, emotive melody, perfectly synchronized with his fingerpicked guitar. The accompaniment follows a steady, arpeggiated chord progression at a slow tempo, mixed slightly behind the vocals but clearly present, with no percussion or additional instrumentation. As the musical phrase progresses, the singer’s delivery grows more intense, his voice carrying the line “I hope that this moment stays perfect,” elongating the final word with a delicate downward inflection and subtle vibrato. The guitar mirrors this emotional swell, adding gentle dynamic lifts on the downbeats. A faint, clean inhalation is audible just before the climax, captured by the close-mic setup, while the small room imparts a natural, moderate reverb that wraps around the performance. The mix remains balanced and unclipped, preserving the raw, live-take authenticity. The scene concludes as the final note and lingering vocal resonance naturally decay into the quiet space, leaving a sense of suspended time and quiet longing.","video_1_relative_path":"videos/c84173b479ca11cb.mp4","video_2_relative_path":"videos/db6b0d6d3af20669.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/music/music_1/example.json::00000095","text_prompt":"An upbeat pop-folk performance unfolds in a static medium close-up, framed against a warm red-orange backdrop with soft frontal lighting and a palette of muted pinks, greys, and vibrant reds. A young woman with long, wavy blonde hair and straight bangs stands center frame behind a black Shure microphone, wearing a sleeveless floral dress with thin shoulder straps. She sings with an earnest, focused expression, her eyes occasionally dropping to the bright red acoustic guitar as her right hand strums rhythmically and her left hand shifts along the fretboard. To her immediate right, the forearm and torso of a companion in a white T-shirt are partially visible, also holding an acoustic guitar. The audio begins immediately with a clean, studio-quality mix: a moderate-tempo arrangement driven by steady quarter-note guitar chords, a foundational bass line, and crisp kick-and-snare percussion. The female vocalist delivers clear, mid-to-high register lines with confident projection, singing, \"A few mistakes ago, I was in your sights, watching me closely as I tried to hide.\"\n\nA hard cut expands the frame to a wider mid-thigh shot, revealing the full stage setup and the intimate atmosphere of the performance. The lead singer remains anchored at the center, her strumming and vocal delivery continuing seamlessly. To her left, another guitarist in a plain white T-shirt actively plays a sunburst-finish acoustic, while to her right, a young man with shaggy brown hair in a dark long-sleeve shirt stands slightly behind, holding a black acoustic guitar vertically and watching the set with quiet focus. A low-intensity yellow spotlight washes up from below near the right guitarist, adding subtle contrast to the otherwise even lighting, while the dark silhouettes of an audience line the bottom edge of the frame. The track maintains its polished, radio-ready texture with no ambient room noise or crowd murmur, preserving the controlled studio feel. The performance carries its introspective yet upbeat momentum forward until the audio and video terminate abruptly mid-phrase, cutting off without resolution.","video_1_relative_path":"videos/c2a66b59a9d278f2.mp4","video_2_relative_path":"videos/a525db8c89ae2143.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/music/music_2/example.json::00000000","text_prompt":"Cinematic ballad performance, shot on a dimly lit stage framed by deep red draped curtains that catch soft, directional light, creating an intimate concert atmosphere. A static medium shot centers on a young female singer seated on a tall wooden stool at center-left. She has long blonde hair with prominent pink streaks and wears a loose purple hoodie over a lighter top, dark patterned pants, and black boots, with rings adorning her fingers as they rest in her lap. A black microphone stand sits directly before her as she sings with expressive facial movements—eyes occasionally closing, head tilting slightly, and subtle smiles forming—matching the emotional contour of the music. Behind her and to the right, a male pianist in a dark shirt sits at a black grand piano, his hands moving across the keys while he glances toward sheet music. The camera begins a slow, steady zoom-out, expanding from the tight portrait to reveal more of the stage: cymbals and drum hardware appear on the far left, additional mic stands dot the floor, and the full width of the curtain backdrop comes into view. Warm spotlights isolate the performers against the shadowy background, maintaining a moody, focused atmosphere throughout.\n\nAurally, the scene is defined by a tender, unaccompanied vocal line supported exclusively by understated piano chords. The tempo is slow, with gentle arpeggiated chords in the lower register grounding a clear, breathy soprano melody. A calm, breathy female voice begins singing, her legato phrasing soft as she intones, \"I change, I think about it,\" her lips moving in precise sync with the first syllables. The camera continues its smooth pullback as the pianist sustains the harmony, his fingers tracing steady chords while the singer holds a note with gentle vibrato. As the zoom completes and the full stage layout is revealed, she delivers the final phrase with a rising inflection and a relaxed, smiling posture, singing, \"This is the best feeling.\" The audio remains clean and resonant, suggesting close-miking in a treated space with minimal reverb, and the performance concludes abruptly mid-phrase without fade-out or resolution, leaving the sonic field entirely occupied by voice and piano.","video_1_relative_path":"videos/85c6659fcccf2bdd.mp4","video_2_relative_path":"videos/4d35d3e5bddc34ad.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/music/music_2/example.json::00000025","text_prompt":"Cinematic intimate performance piece, framed in a static medium close-up with a 50mm lens aesthetic, bathed in diffuse, even lighting that casts no harsh shadows. A young woman with long, wavy blonde hair sits centered in a softly lit bedroom, wearing a plain black short-sleeved T-shirt and cradling a black acoustic guitar across her lap. The dark instrument contrasts against a muted grey-blue wall, with a white headboard and light blue textured pillow visible behind her to the right, and a small framed picture hanging on the wall to her left. The camera remains completely still as she strums rhythmically with her right hand over the soundhole while her left hand shifts through chords on the fretboard. She occasionally glances down at the strings before returning her gaze directly to the lens, her lips moving in precise synchrony with a gentle, breathy mezzo-soprano vocal line.\n\nThe audio unfolds as a pure, unadorned duet between voice and instrument, establishing a slow, melancholic minor-key melody at a steady sixty-eight beats per minute. Her finger-picked arpeggios ring out with clear, resonant plucks that catch the natural room reverb of a modest, untreated space, while her vocal delivery carries a soft dynamic and subtle vibrato on sustained notes. Faint indoor room tone and a barely perceptible electronic hiss linger beneath the performance, punctuated only by the occasional subtle squeak of fingers on the fretboard and soft inhalations between phrases. The recording highlights an authentic, vulnerable mood, where the steady interplay of voice and guitar unfolds without cuts, production effects, or external distractions, drawing the viewer entirely into the quiet emotional weight of the song.","video_1_relative_path":"videos/6080868870d21a99.mp4","video_2_relative_path":"videos/7b6b0ecf0e4e5992.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/music/music_2/example.json::00000060","text_prompt":"Cinematic medium-close shot, static camera at eye level, warm artificial lighting and a cozy domestic palette frame a middle-aged man seated slightly left of center in a softly lit room that doubles as a home office. He wears black-rimmed glasses and a white button-down shirt patterned with small dark motifs, a multicolored woven strap supporting a steel-string ukulele across his torso. Behind him, a neatly made bed with a light-striped comforter rests to the right, while a desk cluttered with a black computer tower, a circular cooling fan, and scattered papers sits to the left, with a tall floor lamp and office chair fading into the background. The camera remains completely still as he strums the instrument in a steady, moderate tempo, his right hand moving rhythmically above the soundhole while his left hand shifts smoothly between chord shapes along the fretboard. His posture is relaxed, punctuated by subtle head nods as he engages with the music in a calm, intimate atmosphere.\n\nThe audio landscape is clean and focused, featuring only the bright, slightly percussive strumming of the ukulele at a consistent ninety to one hundred beats per minute and the performer’s own vocals, set against a very low noise floor with mild natural room reverb. A clear, mid-range male voice with a relaxed, conversational tone and General American accent begins singing, \"I’m gonna lay by the bay,\" delivering the legato melody with a warm, casual warmth. He continues seamlessly into the next phrase, his voice centered in the mix as he sings, \"Winder River Valley is where I belong,\" with the ukulele providing unwavering rhythmic support beneath. Subtle inhalations between phrases are naturally masked by the music, and no ambient noises, handling clicks, or extraneous sounds intrude, preserving the quiet, personal focus of the solo performance.","video_1_relative_path":"videos/52ae66704b774423.mp4","video_2_relative_path":"videos/353a113762b8cf18.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/physics/physics_1/example.json::00000002","text_prompt":"A bright, sunlit outdoor scene captured in a steady wide shot frames a tranquil campsite in a grassy clearing, surrounded by tall green trees and distant mountains under a clear blue sky. The composition centers on a large, olive-green off-road camper trailer with its pop-up roof fully extended and a camouflage canvas top. The rear doors stand open to reveal neatly organized storage compartments, a mounted red fire extinguisher, and a silver folding ladder leaning against the side, while a small metal table nearby holds a kettle and assorted camping gear. In the background, the partial silhouette of a silver car and a rustic wooden structure hint at a remote, self-sufficient wilderness retreat. An adult male, dressed in a light bucket hat, long-sleeved shirt, and khaki pants, enters from the right and walks steadily toward the left, passing behind the trailer. As his boots meet the grass and dirt, soft footfalls and the faint rustle of his clothing blend into the relentless, high-pitched chorus of cicadas that dominates the soundscape, grounding the scene in a warm, late-summer afternoon. Without music or artificial effects, the naturalistic audio carries his calm, conversational voice as he murmurs, \"Oh, so we’re gonna go past Paul,\" delivering the line with a neutral, unaccented tone that suggests quiet planning or off-camera commentary. The unhurried pacing and authentic environmental textures emphasize a mood of quiet anticipation and rugged readiness, leaving only the subtle rhythm of a journey about to begin.","video_1_relative_path":"videos/422c054296091e3f.mp4","video_2_relative_path":"videos/c1ea459b28781ba2.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/physics/physics_1/example.json::00000026","text_prompt":"A cinematic close-up shot captures a vintage light-blue manual typewriter resting on a dark surface, filmed with a static camera angled slightly from above and to the right. Soft, even lighting washes over the scene, casting gentle shadows without harsh highlights, while the background remains completely obscured to keep focus on the machine, a sheet of blank white paper loaded into the roller, and the hands of an unseen typist. The camera holds steady as the typist’s fingers move fluidly across the black keys with white lettering, driving a rapid, irregular rhythm of active composition. After a brief hesitation where one hand lifts slightly from the keyboard, the typist pulls the carriage return lever, advancing the paper with a decisive mechanical motion.\n\nThe soundscape is entirely diegetic, dominated by the crisp, percussive clack of individual keystrokes and the mid-range thud of internal typebars striking the platen. Sharp transients are punctuated by subtle whirs and the distinct metallic ring of the carriage return, all set against a dry, acoustically quiet space where only a faint, low-level electronic hiss emerges during the brief pauses. There is no music, speech, or ambient room noise beyond the tactile mechanics of the machine itself. The precise synchronization between the fluid finger movements and the rhythmic, analog soundscape immerses the viewer in a nostalgic portrait of pre-digital craftsmanship, emphasizing the physicality and deliberate pace of analog writing.","video_1_relative_path":"videos/8e059ecd9c945dc4.mp4","video_2_relative_path":"videos/d3d2a317bdc9415e.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/physics/physics_1/example.json::00000037","text_prompt":"A cinematic culinary tutorial opens in a tight, static close-up, framed with cool-toned illumination from a visible blue gas flame beneath a black non-stick frying pan that contrasts against warm highlights on shimmering oil and pale garlic. A light-skinned hand enters from the left, gripping a matte-black spatula with a silver handle to rhythmically scrape and stir the garlic across the hot surface. A calm, neutral American female voice, speaking from just off-camera, begins the instruction, stating \"And garlic comes ready.\" The acoustics are dry and enclosed, stripped of music or ambient noise, leaving only the persistent, high-frequency hiss of frying oil and the faint metallic clinks of the utensil against the pan.\n\nThe camera holds its fixed position as the garlic pieces swirl and separate in the golden oil, the stirring motion uninterrupted. The same off-screen cook delivers the next cue, adding: \"Put dried shrimps in.\" Immediately following the words, a clear glass bowl tilts from the top edge of the frame, releasing a cascade of small, orange-red dried shrimp into the pan. The impact triggers a sharp, broadband crackle that momentarily overtakes the steady sizzle, followed by the spatula resuming its gentle incorporation of the new ingredient. The shot remains steady until the end, preserving the balanced composition, the rich texture of the cooking food, and the focused, sensory-driven atmosphere of a precise culinary moment.","video_1_relative_path":"videos/1a8721aa4b655328.mp4","video_2_relative_path":"videos/3bd04b29b7abd518.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/physics/physics_2/example.json::00000043","text_prompt":"A handheld, slightly shaky close-up establishes a quiet domestic interior, focusing on an open black laptop resting on a tiled floor. The screen glows with a cyan-blue desktop and a faint central yellowish icon, while natural but dim lighting casts soft shadows beneath a white desk or cabinet that comes into view as the lens pans slowly downward and rightward, revealing a coiled white cable snaking across the tiles. Over a quiet, minimally reverberant room tone, a calm adult male voice in French begins an instructional narration, stating “Donc vous allumez votre ordi.” The camera continues its descent, bringing the black keyboard with white lettering into focus as a hand enters the frame from below, moving purposefully toward the machine.\n\nThe speaker continues with a steady, clear tone, adding “Je vais faire mon code,” just as the hand settles onto the keys. The shot stabilizes on the floor, emphasizing the texture of the brown-gray tiles and the coiled cable, while the fingers begin typing with rapid, practiced urgency. Each keystroke produces a sharp, distinct mechanical click that syncs perfectly with the visual motion, cutting through the subdued indoor ambience. The scene remains entirely focused on this utilitarian interaction, devoid of music or secondary dialogue, and concludes abruptly mid-action as the rhythmic typing continues without fade-out or transition.","video_1_relative_path":"videos/b917c2b482bd685b.mp4","video_2_relative_path":"videos/eba0acc49b9d6558.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/physics/physics_4/example.json::00000016","text_prompt":"A vertical, static low-angle shot captures a tense, storm-battered landscape under a flat, overcast grey sky. The frame is dominated by a thick, textured palm trunk on the left, its fibrous sheaths ranging from light tan to dark brown, while a smaller palm anchors the lower right. Both trees are caught in a relentless gale, their massive fronds whipped horizontally to the right, leaflets streaming and blurring in perfect synchronization with the roaring wind. The atmosphere is heavy and foreboding, stripped of all human presence or artificial objects, leaving only the raw, elemental struggle between vegetation and weather. Aurally, the scene is immersed in a broad-spectrum rush of wind that fills the stereo field, blending a deep, rolling rumble with sharp, high-frequency hissing. The audio intensity mirrors the visual chaos, surging and receding in subtle, natural fluctuations that reinforce the relentless force of the approaching storm, creating an immersive, visceral experience of nature’s untamed power.","video_1_relative_path":"videos/7ca40835d3f55d90.mp4","video_2_relative_path":"videos/696f819408807980.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/physics/physics_4/example.json::00000046","text_prompt":"Cinematic atmospheric vignette in near-total darkness, illuminated only by a warm, flickering orange glow from the right side of the frame. A young adult male with short brown hair, wearing a dark jacket over a white T-shirt, sits centered in a wooden chair. He holds a large, pale flatbread in his left hand and a clear glass bottle with an orange label and blue cap in his right, while a thin wisp of smoke curls from the bread’s edge. Behind him, a dimly lit wall of horizontal wooden planks recedes into shadow. The audio landscape is immediately dominated by the high-pitched, rapidly fluctuating whine of a small electric motor maneuvering close to the microphone, establishing a sense of proximity and latent tension. A hard cut shifts the perspective to an over-the-shoulder view from behind the man, his silhouette anchoring the lower-left foreground against an almost black background punctuated only by a distant, blurry point of light that pulses faintly. The drone sound muffles slightly, then is abruptly interrupted by a sharp percussive crack, like a whip snap or sudden impact, coinciding with a brief visual flicker near the off-screen light source.\n\nAnother abrupt cut returns to a tight frontal close-up of the man’s face. Sweat glistens on his forehead under the directional lighting, which carves deep shadows across his cheeks and neck. His expression remains neutral but intensely alert, eyes fixed forward on something unseen. The drone’s whine persists at a reduced intensity, gradually layering beneath a low, continuous electrical hum that fills the ambient space. As the camera holds, the man blinks slowly and subtly tilts his head downward, maintaining his steady gaze. The audio narrows to the fading drone whine merging seamlessly into the steady hum, punctuated only by the faintest, barely audible breaths. The composition emphasizes stillness and quiet intensity, leaving the viewer suspended in a tense, unresolved moment within the confined, chiaroscuro-lit environment.","video_1_relative_path":"videos/1a097a6292604acd.mp4","video_2_relative_path":"videos/7d4dddd6179e8a68.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/physics/physics_5/example.json::00000011","text_prompt":"Cinematic documentary style, captured on a prime lens in diffuse daylight with a muted winter palette, opens on a slushy, mud-streaked ground. The camera begins in a low-angle close-up, framing the rear undercarriage and black plastic bumper of a heavy-duty vehicle, with the front wheel of a bright blue compact car resting in the periphery. As the lens slowly pans left and tilts upward, the composition settles on a prominent, wide-diameter black exhaust pipe protruding from beneath the bumper. The pipe bears faint, raised embossed lettering and a metallic license plate holder with a stylized emblem to its right, both catching the soft, shadowless light. Subtle mechanical vibrations ripple through the metal and plastic surfaces, grounding the scene in a quiet, utilitarian atmosphere. Aurally, the environment is stripped bare of wind, traffic, or ambient life, leaving only the unwavering, low-frequency rumble of a large-displacement diesel engine idling steadily beneath the chassis. The sound is acoustically dry and intimate, matching the mechanical presence without fluctuation in pitch or rhythm. The shot holds on this focused study of industrial texture and condition before both the visual frame and the engine’s steady chug cut off simultaneously, leaving a stark, unadorned silence.","video_1_relative_path":"videos/9585317382095944.mp4","video_2_relative_path":"videos/cddbeec223bea1a3.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/physics/physics_5/example.json::00000078","text_prompt":"Cinematic handheld sequence, wide-angle lens at a low waist-level angle, lit in near-darkness with a single harsh key light carving high-contrast shadows across a hard concrete surface. The frame trembles with urgent, handheld energy as two dogs blur past from right to left, their rapid motion streaking across the lens. One is a short-haired light-brown canine in a bright yellow jacket with a dark harness strap, while the other is a fluffy white dog in a blue patterned coat. Their paws pound the ground with sharp, synchronized thuds, bodies overlapping in a playful chase. An off-screen female voice, medium-high pitched and laced with playful urgency, cuts through the sparse soundscape, calling out, \"Want to come here? Where’s your mommy?\" The camera whips to follow their trajectory, amplifying the motion blur before the pair briefly slows. The brown dog glances toward the lens while the white dog presses ahead, their collars emitting a faint metallic jingle and their jackets rustling against the low, continuous hum of the environment. As they exit left, the camera lingers for a moment on the empty, shadowed pavement, capturing only the fading breath of the caller and the raw, unscripted immediacy of the moment.","video_1_relative_path":"videos/54b1d9a1aa682acc.mp4","video_2_relative_path":"videos/c953c994f45d8f9a.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/physics/physics_5/example.json::00000090","text_prompt":"Cinematic industrial realism, shot on a 35mm lens with a slight low-angle medium framing that gradually tightens. The scene opens in a dim, cavernous workshop defined by exposed brickwork, tangled pipes, and scattered tools. High-contrast, uneven lighting casts sharp highlights across the polished metal of a massive bell mounted on a red-painted axle, while warm tones catch the aged wood of the broad, spoked wheel encircling it. The apparatus swings rhythmically, driving a relentless, resonant metallic clang that echoes through the space with a natural, lingering reverb. The camera initiates a slow pan to the right and a subtle zoom, drawing the viewer’s focus toward the rotating assembly. Through the spinning spokes, the cluttered background reveals stacked crates, loose cables, and a parked van visible through an open doorway, with a green wall-mounted indicator glowing faintly on the rear brick. As the mechanical rhythm persists, a man with short dark hair and a dark long-sleeved shirt steps into frame from the right, positioning himself behind the apparatus. He leans forward, hands hovering near the wooden rim, his posture focused and attentive as he monitors the unwavering cycle. The camera holds steady, capturing the interplay of his quiet observation against the hypnotic, percussive strikes. The atmosphere remains austere and utilitarian, stripped of music or dialogue, leaving only the raw, resonant clang and the faint mechanical hum of the drive mechanism to underscore the solitary, ritualistic motion of the machine.","video_1_relative_path":"videos/64c6052978d4f2eb.mp4","video_2_relative_path":"videos/59c1c7c2c01d4226.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/physics/physics_5/example.json::00000091","text_prompt":"Cinematic instructional documentary style, captured with natural daylight and a muted, utilitarian palette. The scene opens on a static wide shot inside a modestly finished room undergoing renovation, where off-white walls and a white radiator frame a space with a light wood laminate floor only partially installed. A bald craftsman in a black short-sleeved shirt and dark work trousers kneels on the bare subfloor near the left wall, his attention fixed on fitting the final plank. His right hand steadies the board’s edge while his left guides a black corded plunge router branded FERROM along the wood. The machine’s steady, high-pitched whir dominates the soundscape, a loud and slightly metallic drone underscored by a low electrical hum and the faint click of tool handling, leaving the environment otherwise hushed and devoid of music or speech.\n\nA sharp cut drops the camera into a tight, top-down close-up of the work surface, isolating the router bit, the freshly routed plank, and the operator’s hands. A crisp red laser line projects across the pale wood grain, tracing the exact cutting path as his left hand guides the tool forward with deliberate control. Subtle shifts in finger pressure and thumb placement are visible against the tool’s body, and the router’s pitch rises momentarily as the blade bites deeper before settling back into a steady rhythm. The mechanical whine persists, punctuated only by soft scrapes against the wood fibers and the quiet friction of his grip, maintaining a focused, tactile atmosphere that emphasizes precision craftsmanship and the quiet intensity of skilled manual labor.","video_1_relative_path":"videos/6052c82a5468fb0d.mp4","video_2_relative_path":"videos/cb146f76383df3d9.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/physics/physics_5/example.json::00000092","text_prompt":"Cinematic instructional footage opens in a warmly lit kitchen with red walls and rich wooden cabinetry, bathed in bright daylight filtering through white horizontal blinds. The camera begins in a medium close-up on the profile of a woman with reddish-brown hair tied up, wearing a gray long-sleeved top and small hoop earrings, before tilting down to focus on her hands holding a white enamel colander filled with pumpkin seeds beneath a running chrome faucet. The acoustic space is dominated by the vigorous rush and splash of water echoing off the hard surfaces, while the black countertop beside the sink holds two large pumpkins—one orange with painted facial features, one pale green—alongside a potted green plant in a red vase, a whole pomegranate, and various small bowls and utensils.\n\nA smooth cross-dissolve transitions to a wider, static shot that reveals more of the kitchen’s stainless steel appliances, a bottle of wine, bananas, and a bowl of tomatoes resting on the counters. The woman now faces the camera, smiling broadly as she shakes excess water from the colander. A warm, conversational female voice begins, stating, \"Okay, so I've rinsed the pumpkin seeds and there's a few bits of pulp still clinging to them, so I'll pick those off next.\" As she speaks, maintaining steady eye contact and occasionally gesturing toward the colander, the water sounds gradually fade into a quiet room tone, leaving only the subtle clinks of glassware and the warm, inviting atmosphere of a home cooking tutorial.","video_1_relative_path":"videos/b09f0efd0ce5b55c.mp4","video_2_relative_path":"videos/6e82aff88503ee93.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/physics/physics_6/example.json::00000011","text_prompt":"Cinematic medium close-up, static camera, warm low-key lighting in a softly cluttered bedroom that feels intimate and unscripted. The background holds a large cylindrical white bolster pillow, a blue-and-white tissue box, folded linens, and the faint silhouette of a baby bouncer nestled in the deeper shadows. Centered in the frame, a young child sits cross-legged on white bedding, wearing a sleeveless red dress dotted with tiny white polka dots and a small yellow emblem, her short black hair secured with a delicate clip at the crown. She bursts into uninhibited laughter, mouth wide open and eyes crinkled, her body rocking gently back and forth as her hands flutter excitedly near her lap, fingers splayed and occasionally tapping the mattress.\n\nA large pink plush toy sweeps abruptly into the foreground from the bottom right, momentarily obscuring her torso in a swift, playful gesture from an unseen off-camera presence. The child’s laughter intensifies in response, her head tilting forward and shoulders bouncing with renewed delight as the soft object glides past and exits the frame. The audio landscape is entirely dominated by her spontaneous vocalizations—high-pitched, breathy giggles punctuated by sharp, staccato squeals and rhythmic breathing—layered over the subtle rustle of fabric, a faint whoosh as the toy cuts through the air, and a low, consistent hum from unseen household appliances. With no music or dialogue to distract, the scene holds its candid warmth, closing on the child still smiling broadly, bathed in the same gentle light, her quiet domestic world framed in pure, innocent joy.","video_1_relative_path":"videos/060b0a6d0ac31c56.mp4","video_2_relative_path":"videos/c91919c2d3db213a.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/physics/physics_6/example.json::00000056","text_prompt":"Cinematic post-apocalyptic aerial sequence, shot from a high-altitude first-person perspective drifting over a desolate wasteland rendered in muted, desaturated earth tones. The landscape is a tapestry of grey-brown ruins and scorched earth, partially veiled by low-hanging clouds beneath a sky that gradients from dusky blue to a faint, bruised orange. A deep, resonant low-frequency rumble dominates the audio bed, filling the stereo field with a non-localized, seismic thrum that evokes distant heavy machinery or atmospheric disturbance. Beneath it, a subtle, airy wind whooshes continuously, reinforcing the sense of elevation and exposure. As the camera executes a deliberate upward tilt and gentle forward drift, the horizon clears to reveal a massive column of black smoke rising vertically into the twilight. Its base pulses with bright, irregular orange flames that cast warm, flickering highlights across the otherwise cold terrain. To the right of the inferno, a solitary cylindrical tower stands intact, while further out, an orange-and-black tracked vehicle sits motionless amid dead vegetation. The camera continues its smooth ascent, unveiling rolling hills and mountain ranges silhouetted against the fading light. The ambient soundscape remains unwavering, the low rumble and wind layer persisting without crescendo or fade, mirroring the visual stillness. The shot eventually settles into a static wide frame, holding on the burning ruin and flanking wreckage as the smoke continues to rise. The sequence concludes abruptly, leaving the viewer in a haunting atmosphere of aftermath and isolation, where the relentless subterranean drone and ethereal wind underscore a world abandoned to the quiet consequences of unseen catastrophe.","video_1_relative_path":"videos/ab1e18ce42c312c1.mp4","video_2_relative_path":"videos/58b2038f27efbcd6.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/physics/physics_6/example.json::00000060","text_prompt":"Cinematic product demonstration, static medium close-up, cool even ambient lighting, and a clean minimalist palette define the opening of a quiet indoor space where a white brick wall and a light wooden shelving unit filled with stacked binders frame the composition. A person’s right arm, clad in a blue, grey, and black striped long-sleeve shirt, extends into the frame holding a translucent red spherical alarm clock suspended by a thin white string looped over the index finger. The clock’s digital display and control buttons face forward, held perfectly steady against the softly shadowed background in a room with a faint, natural reverberation and no external noise. The grip suddenly loosens, and the red sphere slips from the string, dropping swiftly out of the top of the frame. The moment it leaves the hand, a sharp mechanical click gives way to a piercing, continuous electronic buzz that dominates the soundscape. The high-frequency alarm tone, steady in pitch and amplitude with no modulation or fade-out, rings out with abrupt intensity, echoing slightly in the modest interior space. The camera remains completely still as the background holds its minimalist composition, leaving the viewer to focus entirely on the sudden, jarring activation of the device.","video_1_relative_path":"videos/6e4f5cb3e5570eec.mp4","video_2_relative_path":"videos/ecbee283d2e6ab59.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/physics/physics_6/example.json::00000078","text_prompt":"Cinematic scene in a modern apartment kitchen, lit by warm overhead lighting that reflects off stainless steel appliances and dark wood cabinetry. A static wide shot frames the space, capturing a large refrigerator with a water dispenser on the right, a microwave mounted above the stove, and a blender resting on a black countertop scattered with plastic cups and food containers. A young man with tattooed forearms, wearing a pink short-sleeved Henley, dark jeans, white sneakers, and a gold watch on his left wrist, enters from a doorway on the right while holding a smartphone to his ear. Speaking into the phone with an energetic, animated tone, he says, “Yeah.” As he strides toward the center of the room, a loud, continuous sizzling sound—consistent with food frying in a pan—dominates the audio track, cutting through a moderately reverberant indoor space. The camera begins a subtle pan to follow him as he passes the refrigerator. Repeating, “Yeah,” he launches into a rapid, earnest explanation: “No, I’m saying the ratio to women to men is gonna be twenty to one.”\n\nA hard cut shifts to a medium close-up of a second man standing near the stove, dressed in a plain red crew-neck T-shirt with short dark hair and light stubble. Initially looking downward, he slowly lifts his gaze upward and slightly to the right, his eyes widening in quiet surprise or skepticism as he processes the conversation, his lips parting slightly without a sound. The sizzling continues uninterrupted beneath the visual shift. The camera cuts back to the first man, now stationed beside the refrigerator. Nodding while affirming with a relaxed but attentive posture, he says, “Yeah, yeah, twenty,” followed by a final, clipped, “Yeah.” As he finishes his confirmation, the intense frying sound abruptly ceases, leaving only a faint, natural room tone as the camera holds steady on his concluding expression before the scene fades to black. The overall mood is light and conversational, driven by expressive performance and everyday sonic textures rather than dramatic scoring.","video_1_relative_path":"videos/3af88447a314675c.mp4","video_2_relative_path":"videos/839088909a0a2022.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/physics/physics_7/example.json::00000032","text_prompt":"Cinematic wide shot, high-angle and static, capturing a brightly lit indoor sports hall with a polished wooden floor bordered by a red running track marked in crisp white lines. Seven young men stand clustered near the center, all dressed identically in pink hooded tracksuits with their hoods pulled up, each jacket featuring a large white rectangular patch bearing a bold black capital letter D. One member clutches a small white plush toy while subtle shifts in posture ripple through the group; one steps forward toward the track’s edge and another raises a hand to adjust his hood. In the background, other teams in blue and orange tracksuits mill about, establishing the setting as a lively school sports day or team competition. The soundscape is dominated by a dense, rhythmic wall of crowd noise as hundreds of unseen spectators shout in unison, their voices forming a powerful, percussive chant that reverberates across the vast gymnasium ceiling. Delivered with a steady, forceful cadence, the collective roar carries an unmistakable tone of organized fan support and celebratory energy, though individual words dissolve into the unified roar. Beneath the vocal surge, a constant low-level hum from overhead ventilation systems and the natural acoustic echo of the indoor arena ground the scene in reality. With no music or dialogue to distract, the raw auditory power of mass vocalization amplifies the visual unity of the group, immersing the viewer in a moment of shared camaraderie and youthful excitement.","video_1_relative_path":"videos/2dc108bdd7487c0d.mp4","video_2_relative_path":"videos/e2d2850abe64eeee.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/podcast/podcast_1/example.json::00000002","text_prompt":"A cinematic documentary scene opens on a wide, static shot with a 35mm lens, bathed in dramatic purple and teal lighting that washes over angular geometric backdrop panels in a large auditorium. Center-left, the iconic three-dimensional red TED logo stands illuminated against the cool tones, while on a circular red rug at stage center, a bald man in a dark long-sleeved shirt, light grey trousers, and dark sneakers with white soles faces the audience, his posture relaxed as he prepares to speak. Behind him, a large projection screen initially displays a still photograph of three men standing in a sunlit grassy field, one holding a baseball bat upright, and the camera holds this consistent, unbroken framing throughout. As the moment unfolds, a wave of loud, collective audience laughter fills the reverberant hall, its broadband resonance peaking before naturally decaying. The speaker lifts his hands in a light, conversational gesture and begins his address in a calm, neutral male voice with clear articulation and a moderate pace. \"I looked at medical students' grades,\" he states, his tone carrying a slight upward inflection that suggests the narrative is just beginning. Mid-utterance, the projection behind him transitions to a new image: a group photograph of medical students and faculty in scrubs and lab coats posing outdoors. The ambient hum of the auditorium and the natural acoustic reverb linger beneath his measured delivery, while the audience's amusement settles into a quiet, attentive backdrop, focusing all attention on his story.","video_1_relative_path":"videos/13800eb2492abaa3.mp4","video_2_relative_path":"videos/9dcaacc5b42234ca.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/podcast/podcast_1/example.json::00000033","text_prompt":"A medium close-up frames a man standing center stage against a completely black background, isolated by a focused spotlight. He has dark hair pulled back and wears a black high-collared shirt adorned with vertical columns of small purple geometric patterns, with a flesh-colored lavalier microphone clipped near his right cheek. The camera remains static as he speaks directly to the audience, his facial expressions shifting between earnestness and emphasis while his mouth articulates each word in sync with his delivery. A calm, confident male British English voice begins, stating, \"And by the end of this talk, I will have explained what I mean by that, why it’s important, and given you a glimpse of how it might work.\" His steady tempo and explanatory tone are accompanied only by the faint reverberation of a large auditorium, a low-level electronic hum from the sound system, and occasional soft inhalations between phrases.\n\nThe scene abruptly cuts to a wide, static shot from behind the speaker, revealing the full scale of the venue as a grand theater filled with rows of seated spectators. He stands on a circular red rug at the center of the stage, facing away from the camera toward the audience. Overhead, ornate chandeliers hang beneath an arched ceiling bathed in deep blue and purple ambient lighting, sharply contrasted by a bright white spotlight shining down from above. A laptop sits open on a small table beside him as he continues, his voice trailing slightly before resolving into a complete thought: \"But first, let's begin.\" The spoken words fade into silence, leaving only the subtle room tone and the lingering echo of the auditorium as the clip concludes.","video_1_relative_path":"videos/9abaf9d19140af42.mp4","video_2_relative_path":"videos/824c302961884a57.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/voiceover/voiceover_1/example.json::00000025","text_prompt":"A cinematic documentary short opens with a static camera, shallow depth of field, and diegetic canopy lighting that casts soft natural daylight across the scene. The frame isolates a young East Asian man’s face against a creamy blur of verdant forest foliage, his dark hair slightly tousled and his brow furrowed in quiet concentration. He lowers his gaze before parting his lips to delicately bring a small morsel to his mouth, chewing slowly as the camera holds fixed on the subtle movement. A gentle, slow-tempo orchestral score—sustained strings layered with faint piano arpeggios—begins immediately, accompanied by the light rustling of leaves and a constant ambient forest hush. The young man speaks in a calm, reflective Mandarin voice with a clear northern accent, his measured pace and mild enthusiasm carrying a slight smile as he states, \"真是又好吃又营养。\"\n\nA hard cut shifts to an extreme close-up of weather-worn, dark-skinned hands cradling a glistening piece of honeycomb. Golden-brown stains coat the calloused fingers as amber wax cells drip viscous syrup, catching the dappled sunlight that glints off the sticky surface while the red, white, and blue plaid sleeve of a shirt peeks into the upper left of the frame. The orchestral underscore swells slightly to amplify the sensory richness, blending with faint insect chirps and the soft squish of honey. The scene transitions to a medium close-up of an older East Asian man standing amid tree trunks and leafy undergrowth, wearing the same plaid button-down over a darker undershirt. Perspiration beads on his lined forehead and thin mustache, but his face breaks into a broad, crinkling smile as he lifts a honey-coated finger to his mouth and licks it clean. A warm, relaxed male Mandarin voice, tinged with a slight regional inflection and light chuckle, radiates cheerful nostalgia as he says, \"好久没吃到了。\" The camera holds on his delighted expression as ambient birdsong becomes momentarily clearer, the continuous score weaving through the moment before the image gently fades.","video_1_relative_path":"videos/0d27721e2846f71a.mp4","video_2_relative_path":"videos/75fc8de406594425.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/voiceover/voiceover_1/example.json::00000066","text_prompt":"A cinematic scene bathed in cool-toned, overcast daylight and a desaturated palette of blues and greys opens with a static medium-long shot framed through the diamond pattern of a grey chain-link fence that dominates the foreground and partially occludes a weather-worn stone wall behind it. Seated on the ground just inside the barrier is a man in his late thirties to early forties, wearing a dark zip-up jacket and light-brown trousers with his knees drawn up and hands resting loosely between them. His gaze is fixed toward the right edge of the frame, his face solemn and slightly tense as sparse weeds poke through the cracks in the paving stones at his feet. Under a faint, low electronic drone, a calm male Mandarin voice-over begins, stating “这个人是他的亲哥哥。” (This person is his own brother.).\n\nThe view cuts to an extreme close-up from the opposite side of the same fence, the camera handheld but steady and angled slightly upward. Dominating the left half of the frame is the near-profile of a younger man in his mid-twenties, with fair skin, short dark hair, intense blue eyes, and a hint of stubble. His expression is grave, lips pressed together, eyes fixed off-screen to the right, while slightly behind him and out of focus stands another man in a dark blue knit beanie and matching jacket, his right hand gripping the mesh of the fence. As the narration settles, the English-speaking man in the foreground quietly adds, in a subdued and resolute tone, “Because he’s my brother.” The ambient drone continues underneath, the flat, diffused lighting emphasizing the somber mood as both men remain motionless, conveying a heavy sense of tension and solidarity. The image holds on this emotionally charged tableau, the low electronic hum persisting for a brief moment after the final words before fading, leaving the unresolved conflict hanging in the air.","video_1_relative_path":"videos/4288f4f8a1cf5e06.mp4","video_2_relative_path":"videos/130daf3e21b6e01a.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/voiceover/voiceover_10/example.json::00000057","text_prompt":"Intimate period drama, captured on a 50mm prime lens with warm, amber tungsten lighting that casts golden highlights and soft shadows across a vintage European interior dominated by yellow wallpaper, muted greens, and rich browns. The scene opens with a locked medium close-up of a young woman seated indoors, her fair skin and dark brown chin-length bob with straight bangs softly illuminated. She wears a brown cardigan over a pale top, her gaze cast downward in quiet contemplation as a slow, minor-key piano melody accompanied by faint sustained strings begins to play. A calm, reflective male Mandarin voice-over begins, stating \"无数个难眠夜晚的微光。\" The camera remains completely still, framing her upper torso and face while a dark wooden cabinet with glass doors, adorned with small figurines, stands against the wall behind her.\n\nA hard cut shifts to an over-the-shoulder medium shot from behind the younger woman, revealing an older woman seated across from her. The older woman has voluminous curly red hair pinned back with a red bow and wears a short-sleeved dress patterned with dense red and white floral motifs. She holds a folded sheet of paper at chest height, her posture upright and her hands gently adjusting the letter as she looks toward the younger woman with poised curiosity. The same warm lighting bathes the eclectic room, highlighting a green-painted doorway, hanging ornaments including a birdcage, framed pictures, and a large ornate lamp with a reddish-orange shade. Beneath the continuing piano-and-strings score, a gentle, mildly inquisitive female French voice asks: \"Vous aviez écrit des lettres comme ça, mademoiselle ?\" The sparse soundscape and restrained performances emphasize the emotional weight of the unseen letter, evoking a mood of quiet nostalgia, memory, and tender human connection.","video_1_relative_path":"videos/f5dd3190e9142393.mp4","video_2_relative_path":"videos/e29e221bee553286.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/voiceover/voiceover_10/example.json::00000059","text_prompt":"Late-afternoon sunlight back-lights a tranquil riverside canal, establishing a high-contrast cinematic look with warm highlights and cool blue-green tones in the shallow-focus background of blurred trees, concrete embankments, and a low bridge. The camera opens on a locked-off medium close-up of a middle-aged white man with short salt-and-pepper hair and a light-blue button-down shirt, his face softly side-lit with shadows carving one cheek while rim light catches his hair and shoulder. A subdued, low-frequency electronic drone hums beneath the quiet atmosphere as he looks slightly off-camera to his right, lips parted, and delivers a calm, slightly dismissive line in Mandarin: \"虚的,\" completing the thought with a weary dismissal of empty games. The shot holds for a beat before cutting without movement to a matching medium close-up of a bald Black man in a dark suit, light dress shirt, and red patterned tie, standing against the same sun-dappled environment.\n\nHe maintains steady eye contact toward the first man’s position, his voice resonant and measured as he replies in English, \"And for you.\" The ambient synth bed continues quietly, then swells imperceptibly with a faint higher-pitched pad that deepens the tension. The suited man’s expression shifts subtly—eyebrows lifting, mouth corners tightening—as he weighs his words, glancing briefly downward before returning his gaze forward. He leans forward a fraction, his tone growing more personal and emphatic, mixing quiet pride with a direct challenge as he states, \"I’m a native son of South Central, Bosch.\" The camera remains fixed on his intent expression as the warm sunlight contrasts sharply with the cool, blurred environment, the tense electronic undercurrent holding steady until the frame fades.","video_1_relative_path":"videos/dbd1c0930bd090d7.mp4","video_2_relative_path":"videos/894e97b029040eea.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/voiceover/voiceover_11/example.json::00000002","text_prompt":"Open on a warmly lit nighttime patio or covered entryway of a suburban house, where a vivid red carpet stretches toward double glass doors revealing a softly glowing interior. To the left, a large terracotta pot holds a small evergreen tree strung with warm white fairy lights, casting a festive glow against the cool night air. In the doorway, a man in a dark suit watches as two others engage in a vigorous scuffle on the carpet. One combatant is clad in an eye-catching full-body costume of fluffy white feathers, accented with pink ribbons and red thigh-high stockings, his head completely hidden beneath the plumes. His opponent, dressed entirely in black with short brown hair, kneels over him, gripping him tightly around the waist. A calm, neutral female Mandarin voice-over begins, stating \"He’s willing to come to blows with a friend over this,\" while faint rustling of feathers and muffled thuds underscore the physical struggle.\n\nWith a sudden heave, the man in black drives the costumed figure backward, sending them crashing onto the red carpet in a heap. The feathered body flips partially upside-down, its wings splaying outward as dust motes catch the light and loose feathers flutter through the air. The camera remains mostly static but tilts slightly to keep both combatants centered. A sharp male Mandarin narrator interjects, \"Hey, watch out, don't break the wings!\" as the suited observer inside shifts his weight, caught between concern and amusement. Both men settle on the carpet, still tangled. The man in black lies atop, momentarily bracing himself on one forearm before collapsing flat, while the costumed figure wriggles beneath, scattering more feathers. Suddenly, an American-accented male voice shouts urgently from off-screen right, \"Hey, hey, watch the wings! Watch the wings!\" His loud, alarmed tone echoes in the open space, and the scene freezes on this moment of comic chaos, leaving only the layered sounds of fabric brushing, a dull impact, and the fading echo of the warning.","video_1_relative_path":"videos/46644222c6b1cfa4.mp4","video_2_relative_path":"videos/d3965bb1dcaf54a2.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/voiceover/voiceover_11/example.json::00000058","text_prompt":"The scene opens on a tight, low-angle close-up of a light-skinned man in his late thirties, his short dark-brown hair and blue eyes sharply defined against a softly blurred background of warm browns and yellows. He wears a dark suit jacket over a white dress shirt with an open collar, seated in a dimly lit interior where a subtle key light from camera right carves a dramatic chiaroscuro across his face. A calm, measured male Mandarin voice begins, his tone steady and explanatory as he leans into the frame with a restrained half-smile, stating, “What exactly are they looking for? Second, his father never gave him anything to begin with, and now there is simply nothing left to explain.” The audio remains clean and dry, isolating his voice against the quiet tension of the space.\n\nA straight cut pulls back to reveal a wider view of a bathroom bathed in soft, ambient light, its walls painted warm terracotta and accented by a vanity lined in small teal-blue tiles. The man now stands on the rim of a large white bathtub filled with pale water, still in his white shirt and dark trousers, leaning forward to gesture toward a woman seated on the closed toilet lid opposite him. She is a light-skinned woman in her thirties with shoulder-length brown hair, dressed in a dark long-sleeved top and jeans, her head bowed and hands resting in her lap in a posture of quiet resignation. Behind them, a mirror catches the silhouettes of palm trees through a sheer curtain, hinting at a tropical setting, while neatly hung towels frame the intimate space. As his speech concludes, a brief, higher-pitched male voice cuts in from off-screen in English: “Where is it?” The clean audio mix holds the sharp contrast between the languages before the picture cuts abruptly to black, leaving the narrative suspended in unresolved suspense.","video_1_relative_path":"videos/003f4b25651a5fe9.mp4","video_2_relative_path":"videos/7a206c7e3d786432.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/voiceover/voiceover_11/example.json::00000064","text_prompt":"Widescreen 16:9 cinematic frame, shallow depth of field, diffuse cool lighting suggesting an overcast exterior, muted blue and grey palette. The scene opens on a tight, static close-up framed behind the shoulder of an older, light-skinned man with short grey hair and a dark-blue jacket collar. A chain-link fence dominates the foreground in soft focus, separating him from a younger Black man wearing a ribbed navy beanie, a pale-blue collared shirt, and a darker outer garment. The younger man’s brow is slightly furrowed as he speaks, his mouth moving against a backdrop of continuous low mechanical hum. A calm, critical male Mandarin voice-over begins, stating \"真是将无耻演绎到了极致.\" A hard cut reverses to a matching close-up of the older man’s face; he looks downward and slightly right, his eyes half-closing as a restrained smirk touches his lips, the fence still blurring the foreground. The ambient hum persists unchanged.\n\nAnother cut returns to the original angle on the younger man. He raises his gaze toward the older man, speaking with a hint of exasperation, \"Your problem was somebody already gave seven hundred for that room.\" Almost simultaneously, a deeper, gravelly English voice interjects with a brief, amused remark, \"And that bad.\" A quieter background voice follows, completing an explanatory thought, \"The deal is already moving forward without us.\" The fence remains sharply in focus, emphasizing the physical and emotional separation between the characters, while the background stays softly blurred. The low mechanical hum continues until the scene cuts abruptly, leaving the tense, morally ambiguous negotiation hanging in the cool, overcast air.","video_1_relative_path":"videos/6d4df002d4567be8.mp4","video_2_relative_path":"videos/916f2e94cf0caa93.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/voiceover/voiceover_11/example.json::00000069","text_prompt":"Widescreen 16:9 cinematic scene, natural morning light filtering through a dense green forest canopy, casting soft shadows over saturated foliage. An olive-green dome tent rests on a bed of fallen leaves. In the foreground, an older man with long white hair and a beard, wearing a dark fedora and a red-and-blue plaid shirt over a grey tee, stands with a large red hiking backpack. Beside him, a younger blond man in a green-and-black plaid shirt and black vest bends over to adjust tan hiking boots, a black-and-red pack on his shoulders. Just outside the tent, a woman with shoulder-length brown hair, wrapped in a pink fleece jacket and purple Crocs, leans against the tent fabric, eating from a white bowl with a spoon. The atmosphere is quiet, filled only with soft birdsong and faint rustling leaves. A calm, neutral male Mandarin voice-over begins, stating \"第二天一早，两人提前准备好\". The camera cuts to a tighter medium two-shot of the two men. The younger man straightens, holding a boot, and glances toward his companion. Both now wear their full packs, their faces showing mild concentration and quiet anticipation. The narrator continues evenly, adding \"自来熟才刚刚起床\".\n\nA quick cut reveals the woman looking up from her meal, her eyes bright and a broad smile spreading across her face as she tilts her head, clearly excited for the day ahead. The background remains softly blurred, emphasizing her joyful expression. Suddenly, the image freezes on her smiling face, halting all motion while the audio continues. A higher-pitched, energetic female voice with a General American accent calls out cheerfully, \"You guys heading out?\" The static frame and incongruous English interjection create a deliberate comedic pause, leaving a moment of silence before the scene concludes.","video_1_relative_path":"videos/4ce5eb5b162738e2.mp4","video_2_relative_path":"videos/6d71e41a2d4608ef.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/voiceover/voiceover_2/example.json::00000069","text_prompt":"A high-angle static wide shot captures a polished wooden gymnasium floor marked by yellow sports lines, bathed in diffuse overhead lighting that casts minimal shadows and highlights the warm wood tones against the students’ cool navy-blue blazers trimmed in red and white. About ten young East Asian students sit or crouch in a tight circle around a low black table, their attention fixed on a bright yellow picture book held by a woman in her thirties. Wearing glasses, a brown blazer, and a light-pink blouse, she occupies the top of the semicircle, pointing at cartoon illustrations while a calm male voice-over in Standard Mandarin states, “主题是《白雪公主与七个小矮人》。” Large white sheets covered in hand-drawn diagrams and colored markings lie flat on the tabletop. The students lean forward in focused engagement: one writes briskly in a notebook, another rests his chin on his hand in thought, and two others drape their arms casually over each other’s shoulders, conveying a blend of task orientation and friendly camaraderie. The acoustic space remains dry and studio-like, devoid of background music or ambient noise.\n\nWithout breaking the static frame, a man standing directly behind the woman—dressed in a dark blazer with matching red-and-white trim and a patterned tie—leans over the book, points to a specific character drawing, and smiles broadly. The woman lowers the book and turns toward him, prompting immediate reactions from the group. One boy raises his index finger as if offering an idea, another nods appreciatively, and the note-taker continues scribbling. Suddenly, a group of youthful voices bursts into a short, energetic chant in unison, joyfully repeating, “白雪公主七个小矮人！” The vibrant yellows, reds, and blues of the children’s book and diagrams pop against the neutral gym lighting as the playful, team-spirited moment peaks. The scene holds for a fraction of a second after the chant concludes, freezing the image in a tableau of collaborative learning before fading to black.","video_1_relative_path":"videos/7a3ddfddf3715cbf.mp4","video_2_relative_path":"videos/666e8fada0d828cd.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/voiceover/voiceover_2/example.json::00000088","text_prompt":"A historical-fantasy sequence, shot on a 35mm lens with soft, diffused daylight and an earthy palette of muted greys, warm beige, and natural greens, opens in a sun-dappled field of tall grass and scattered weeds. A low-angle medium frame elevates a solitary figure clad head-to-toe in ornate, dark-grey metallic armor etched with intricate relief patterns. The helmet’s visor conceals the wearer’s face, leaving only a human silhouette kneeling on one knee and bowing deeply toward someone just out of frame at screen left. At the extreme left edge, the torso and arm of a second individual are visible, dressed in a white blouse with delicate lace trim beneath a brown, fur-edged cloak fastened by a red cord. A calm, neutral female Mandarin voice-over begins, her measured and advisory tone stating, \"I hope he no longer risks his life for those who aren't worth it.\" The surrounding ambience remains deliberately silent, focusing all attention on the visual weight of the exchange.\n\nA straight cut shifts to a tight close-up of a young woman standing amid the same verdant backdrop. Her fair skin contrasts with neatly styled black hair gathered into an up-do, straight bangs framing a thoughtful expression as she looks downward and slightly to her right, lips parted as though finishing a thought. Natural light illuminates her face evenly against a softly blurred background, isolating her emotionally charged presence. The female voice continues, now delivered directly by the on-screen woman in a quieter, more personal register, her earnest tone carrying a hint of concern as she adds, \"Your enemy is on our side.\" The camera lingers on her face, capturing a dynamic of power and vulnerability, while the deliberate silence and somber lighting deepen the contemplative mood of a pivotal conversation about loyalty and sacrifice.","video_1_relative_path":"videos/251e5202bcfb96e4.mp4","video_2_relative_path":"videos/24e4f07740aa84e2.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/voiceover/voiceover_3/example.json::00000010","text_prompt":"A moody, satirical scene opens in a steady, locked-off medium shot within a dimly lit, teal-walled study densely packed with antique timepieces and framed paintings, rendered in dramatic chiaroscuro. Warm practical light from a two-bulb candelabra on the left and a soft blue-white table lamp on the right carve out the faces of two figures standing close together, both draped in identical deep-red velvet hooded capes that evoke a conspiratorial atmosphere. The older man, mid-forties to early fifties with short, slightly tousled black hair and a fair complexion, leans forward with wide, intensely manic eyes. A clear, forceful male Mandarin voice begins, stating “反正自己和当年永远的死无关，凶手再怎么杀，也轮不到他的头上。” As he delivers the line, he lifts a small white cylindrical vial in his right hand, gesturing emphatically toward himself while the younger figure remains mostly motionless, visible only from behind and in profile, head tilted slightly downward in quiet observation.\n\nAbruptly, the older man’s intense expression fractures into a broad grin, and a strained male Japanese voice rises in triumphant bravado: “俺は安全だ！” A sharp, high-pitched electronic sting underscores the declaration, immediately followed by loud, unrestrained laughter. He throws his head back, shoulders shaking as the sustained, joyful cackle fills the frame, while the camera holds its static position. The crimson capes stand out starkly against the muted, shadow-draped background, emphasizing the sudden shift from frantic declaration to manic release. The scene lingers on this visual crescendo of laughter and stillness before fading to black, leaving only the echo of the electronic sting and the older man’s boisterous voice in the dimly lit room.","video_1_relative_path":"videos/99cda1ba1d93c9a6.mp4","video_2_relative_path":"videos/e00cd1f33013576b.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/voiceover/voiceover_3/example.json::00000012","text_prompt":"A moody, tech-noir cinematic scene opens in a dim, cluttered control room or workshop, illuminated by a dual-source lighting setup that blends warm tungsten from a desk lamp with the cool cyan spill of two computer monitors. Shot from behind the right shoulder of a seated man, the camera frames his back and the side of his head in the foreground while wooden shelves stacked with vintage electronics, a wall clock, and tangled wires dissolve into a soft, out-of-focus background. A low, persistent electronic hum fills the minimalist soundscape. The man, dressed in a brown V-neck sweater over a white collared shirt and wearing large black over-ear headphones, sits motionless before turning his head slightly left toward the nearest screen. A calm, concerned Cantonese voice asks, \"有咩問題?\" (\"Any problem?\"). The shot holds without cutting as he finishes turning, his eyes locked on the display and his shoulders tense, the faint blue monitor light flickering across his glasses while the ambient machinery noise continues uninterrupted.\n\nA hard cut shifts to a tight profile close-up of the same man from the opposite side, his shallow depth of field rendering the room into indistinct bokeh. His brow is furrowed and his expression intent as he listens through the earpieces. A measured, documentary-style male narrator begins speaking in Mandarin: \"看到基地裡只剩下自己和阿祖，古仔很快就有了一个大胆的想法。\" The steady low-frequency hum remains the only sound as the clip lingers on his focused profile, emphasizing psychological tension through static camera work and a stark, high-contrast palette.","video_1_relative_path":"videos/8ea79a8dd6c91c1f.mp4","video_2_relative_path":"videos/d6c22f0e816dfd5d.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/voiceover/voiceover_3/example.json::00000043","text_prompt":"A psychological thriller sequence captured in tight, static close-ups, utilizing a cool, clinical color grade with a warm front-left key light on the older subject contrasting a flatter, cooler fill on the younger. The scene opens in a dim, muted green-grey interior resembling an interrogation room or medical observation cell. A tight close-up frames a middle-aged man with dark, slightly disheveled hair and light stubble. His eyes are wide and bloodshot, locked intensely toward someone just off-camera to his right. He wears a pale collared shirt softly illuminated from the front-left, while the background remains softly blurred. Beneath the image, a low, ominous electronic drone hums almost imperceptibly. A calm yet grave male Mandarin voice speaks, stating, “This means he doesn’t need to sleep at all.”\n\nA straight cut shifts to a younger man with a short buzz-cut and a grey crew-neck T-shirt, leaning back against a hard surface. Behind him, a stainless-steel sink and pale tiled wall reinforce the sterile, clinical atmosphere. His expression mixes confusion and apprehension as he looks upward and slightly to the left, mouth slightly parted. The ambient synth pad continues quietly in the background. In a slightly higher, anxious tone, he asks, “What does that mean?” The camera cuts back to the first man, still holding his intense, unwavering gaze. He takes a slow breath and answers in a low, deliberate voice with a faint rasp, “It means I don’t sleep.” The tense, sustained chord in the musical bed holds without change, underscoring the unsettling revelation. The shot freezes on his stare, ending abruptly to leave the narrative suspense unresolved and implying a deeper story beyond the moment.","video_1_relative_path":"videos/b8dd52975995e57b.mp4","video_2_relative_path":"videos/58b859bff3255998.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/voiceover/voiceover_3/example.json::00000062","text_prompt":"A refined, documentary-style cinematic sequence opens with a close, slightly low-angle static shot of three green-tinted wine bottles standing in a neat row on a glossy tabletop that mirrors their bases and the soft amber light overhead. Each bottle bears an off-white paper label bordered by a thin dark line, featuring a small reddish-brown crest above two lines of black serif capitals, with the most legible reading “LEON CAPELLO” and a partially obscured year beneath. The edge of a fourth bottle intrudes gently from the right, while the background dissolves into a warm, softly blurred interior where daylight filters through glass doors and indistinct figures move about, including one person in a red garment crossing the frame. Beneath this composition, a gentle, slow-tempo instrumental track dominated by plucked guzheng-like strings plays quietly as a calm, neutral male Mandarin voice-over begins, stating “他的发迹史要大大晚于海参。”\n\nA single hard cut shifts the perspective to an extreme close-up high-angle macro view of a shallow bowl filled with clear, golden-amber liquid, its surface shimmering with tiny ripples and scattered reflections. From the upper left, a pair of dark wooden chopsticks enters the frame to delicately pinch a pale, translucent, ribbon-shaped morsel reminiscent of soaked abalone or sea cucumber. As the utensil lifts the food, droplets fall back into the bowl, producing faint splashes that catch the warm directional key light and rich specular highlights. The background remains intentionally soft to isolate the glistening textures and liquid sheen, while the serene string music continues seamlessly underneath the narrator’s steady, measured delivery as he adds, “算是酒席上的新贵。” The entire scene maintains a shallow depth of field, a subtle, refined atmosphere, and an audio mix that prioritizes the narrator’s clarity with the instrumental track sitting quietly beneath, free of environmental noise or additional voices.","video_1_relative_path":"videos/c5ea17d8321d3acd.mp4","video_2_relative_path":"videos/54b17bf7e2cf7a40.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/voiceover/voiceover_4/example.json::00000046","text_prompt":"A tense historical wartime drama unfolds in a sun-dappled forest, captured in a tight, slightly low-angled medium close-up framed by the rough bark of a tree trunk at screen-left and blurred green foliage behind. Natural daylight filters through the canopy, casting soft shadows and dappled highlights across a muted earth-tone palette. Three men crouch or kneel together, half-hidden by branches. The man closest to camera, mid-aged with short black hair and a dark blue-grey jacket over a light collar, glances sideways with an alert yet mischievous half-smile. Beside him, a younger man in his early twenties, wearing a brownish-grey tunic and tousled black hair, grips a small pale crumpled object and beams broadly toward his companions. A third figure, farther back and partly obscured, wears a black beanie and a red-and-black backpack, peering forward with tense focus. Soft natural ambience, carrying distant birds and a faint rustle, underlies the moment as a lively adult male narrator in Standard Mandarin begins, stating \"The heroic rogue hatched a plan.\" The camera remains static but tightens slightly on the trio. The young man’s grin widens into a gleeful expression as he turns his head rightward, still clutching the object, while the leader’s smile fades into concentrated determination, his eyes narrowing as he surveys the unseen threat ahead. The beanie-wearing companion maintains a wary stare. The narrator continues without pause, urging, \"Don’t blink ahead, brothers!\"\n\nA sudden cut shifts perspective to a distant, shaky long shot viewed from behind a dark foreground obstruction, suggesting covert observation. The three protagonists are no longer visible; instead, a steep earthen embankment covered with shrubs fills the frame. From the lower right, a lone figure wearing a loose white shirt patterned with dark spots runs upward across the slope, arms pumping and body leaning forward in urgent motion, kicking up dust. Ambient forest sounds persist beneath the narrator’s final words. As the runner nears the crest, a young adult female voice erupts in a panicked, high-pitched scream: \"Help!\" The image holds for a brief instant on the fleeing figure before the scene concludes, leaving the outcome unresolved. No additional music or effects follow; only the lingering echo of the cry and faint environmental noise carry the final moments, reinforcing the sparse, suspenseful sound design and shallow depth of field that isolates the guerrilla encounter.","video_1_relative_path":"videos/c72672e8134e6e7a.mp4","video_2_relative_path":"videos/1e781bbed6ac4270.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/voiceover/voiceover_4/example.json::00000069","text_prompt":"A tense, desaturated prison drama unfolds in high-contrast chiaroscuro, shot on a static camera with shallow depth of field to isolate subjects against blurred institutional backdrops. The clip opens on a tight, slightly low-angled close-up of a young white inmate in a white ribbed long-sleeve shirt. Cold bluish side-lighting from camera right sculpts his face, plunging the left half into deep shadow while highlighting his right cheek and forehead, with a faint vertical strip of daylight bleeding through a barred window behind him. His eyes are wide and fixed just off-camera to the right, mouth parted mid-breath as a calm, neutral male Mandarin voice-over begins, stating, “电影什么的事情，就把这个事啊给交代了。” A barely audible low electronic hum underscores the scene. A hard cut shifts to a medium close-up profile of an older white prison guard seated at a desk, his dark uniform jacket bearing a circular shoulder patch that reads “RIVER PENITENTIARY.” Cool directional light casts crisp shadows across his cheek and sleeve as he lifts a light-blue disposable cup with a straw and takes a slow sip, a slim monitor edge intruding at the frame’s left. The scene then widens to a static view of the holding room, where grey cinder blocks plastered with pinned notices and photographs line the walls behind the standing inmate. Horizontal blinds to the left cast slatted shafts of light, while a black gooseneck desk lamp in the right foreground adds a warm practical glow to the otherwise blue-grey palette. The inmate steps forward, gesturing emphatically with his right hand, palm outward, then points toward the seated guard whose back faces the camera. Simultaneously, a clear, neutral-accented English male voice cuts through the ambient hum: “In the yard today.” The restrained editing and static camera keep the focus entirely on the psychological tension and the stark, somber atmosphere of the interrogation space.","video_1_relative_path":"videos/356c06b476c8c65a.mp4","video_2_relative_path":"videos/674951cd17e4c4e3.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/voiceover/voiceover_5/example.json::00000010","text_prompt":"A tense, low-key thriller sequence captured with tight close-ups and shifting wide angles, bathed in high-contrast chiaroscuro lighting that carves deep shadows across a confined, claustrophobic interior. Three men huddle near a heavy, scuffed metal hatch set into a blue-grey floor. In the foreground, a bald man with a goatee lies on his back, sweat glistening on his forehead, eyes wide and strained as he stares upward. Behind him, a dark-haired man grips his shoulders, leaning in with tense focus toward something just out of frame. A male Mandarin voice-over begins, calm but urgent, stating “老DB库珀毕竟年纪大了，来不及上来，先把地毯盖上再说了。” The narration holds steady over the quiet tension, the ambient space otherwise still.\n\nThe perspective shifts to a profile of the bald man, now crouched and breathing heavily, jaw clenched against the strain. The camera pulls back to show a small group gathered around the opening: a blond man in a black shirt peers down into the narrow concrete shaft, while another in a dark jacket holds a flashlight, their postures radiating urgency. The camera drops to a direct overhead angle, looking straight down into the debris-strewn pit where the bald man struggles upward through dust and rubble. Suddenly, a loud, low-frequency rumble erupts—a brutal mix of mechanical grinding and structural groaning that shakes the space. From within the shaft, the bald man thrusts both arms upward toward the light, fingers splayed in desperation. A strained male English voice cracks with panic as he shouts, “Stay back!” The exclamation rings out over the swelling noise, the camera holding on his terrified, defiant expression as the sound design swells to a crescendo, leaving the outcome suspended in the dark.","video_1_relative_path":"videos/665105da9f4c88ad.mp4","video_2_relative_path":"videos/450053d73f26cc9d.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/voiceover/voiceover_6/example.json::00000026","text_prompt":"Cinematic documentary style, 35mm lens, cool pre-dawn lighting transitioning to bright natural daylight, a palette of desaturated blues and greys shifting to warm sun-washed tones. The frame opens on a dark, pre-dawn seascape from the perspective of a small wooden boat rocking gently on calm water. Positioned slightly behind and to the right, a fisherman stands in the foreground, his back to the camera, wearing a broad-brimmed straw hat secured with a red string and a faded blue work jacket. He faces a horizon where the sky softens from deep indigo into pale grey-blue, while a slim flagpole at the bow holds a tiny red flag fluttering in the still air. A calm, documentary male voice in standard Mandarin begins, stating “这些海蟹将出现在大城市的餐厅。” Beneath his measured delivery, a soft orchestral bed emerges, led by low strings and an airy synthesizer pad. The camera eases backward, revealing weathered planks, scattered crates, and tangled fishing gear, along with a second figure seated quietly farther aft. The water’s surface mirrors the muted dawn hues, and distant landforms emerge as barely discernible silhouettes. As the narrator’s sentence concludes, violins introduce a slow, lyrical motif, thickening the score while the ambient soundscape remains purely musical and vocal, devoid of engine hum or breaking waves.\n\nAn abrupt cut transitions to broad daylight, locking the camera into a static wide shot that looks out over a sweeping bay dotted with green, rolling islands beneath a bright azure sky streaked with white clouds. Sunlight glints across gentle ripples, and the wooden deck in the immediate foreground is sun-washed, its grain clearly visible and slightly damp from the morning mist. The orchestral score swells modestly, gaining warmth through richer string harmonies that evoke an uplifting, reflective mood without percussion or brass. The scene holds on this tranquil vista, visually reinforcing the quiet transition from pre-dawn harvest to the promise of abundance, leaving the viewer in a moment of suspended, cinematic stillness.","video_1_relative_path":"videos/312eaa66cafb0c55.mp4","video_2_relative_path":"videos/5f7acf1408268d8f.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/voiceover/voiceover_6/example.json::00000039","text_prompt":"Cinematic documentary style, cool earth tones of deep greens and muted browns, shallow depth of field. The scene opens in a tight close-up of a moss-covered fallen log resting beside shallow, dark water. A weather-worn right hand, its skin tanned and calloused, reaches out and presses flat against the wet bark, fingers splayed for grip. Shot with a static but handheld camera that lends a faint natural sway, the frame captures soft, diffuse daylight filtering through overhead foliage to produce mottled highlights on the damp wood. Beneath this quiet visual, a calm, measured male Mandarin voice-over begins, stating \"现在，他准备摆脱藤条。\", while a low, atmospheric bed of sustained strings or synthesized pads swells gently in the background.\n\nThe perspective shifts to a low-angle medium shot from beneath a thick tree trunk as a climber, clad in dark navy-black trousers, sturdy boots, and a matching jacket with a lighter collar lining, steps into frame. Gripping a gnarled vine that hangs diagonally across the lens, the figure pulls upward, their clothing rustling and the vine creaking under tension. The camera tilts slightly to follow the ascent, maintaining a shallow depth of field that blurs the surrounding foliage into soft green bokeh while keeping the focus on the physical exertion. An extreme close-up then isolates the climber’s boot pressing firmly against the rough bark, rendering the texture of the wood, the weave of the fabric, and the surface moisture in crisp detail. Low-key lighting emphasizes the contrast between the shadowed folds of the clothing and the brighter highlights on the wet wood, sustaining an intimate, contemplative mood. As the climber holds their effortful posture, the scene fades to black, leaving only the lingering resonance of the final musical chord to underscore the quiet struggle.","video_1_relative_path":"videos/74a5cd8117a327bd.mp4","video_2_relative_path":"videos/8ca8ccd496cb0d1e.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/voiceover/voiceover_6/example.json::00000080","text_prompt":"Cinematic domestic drama, shot on a steady medium lens with warm amber color grading and soft yellow lighting, opens in a cozy living room where a light-brown-haired man in his late thirties stands at frame-left, wearing a dark blazer over a red-and-white plaid shirt and solid red tie, facing slightly rightward with an easy half-smile. In the mid-ground, a curly-blond seven-year-old boy sprints from a hallway toward the camera, arms pumping and mouth wide open in excited shouts, while to the right, a blond five-year-old girl sits on a brown sofa, her head turned toward the man with bright, smiling eyes and a tablet resting on the cushion behind her. The room’s domestic décor, featuring white trim, a dark door, a side-table lamp, and a large abstract green-yellow painting, grounds the scene. Over this image, a calm, neutral male Mandarin voice-over begins, stating “子孙满堂，令他不禁称赞。” beneath a soft, sentimental bed of slow piano and faint strings.\n\nThe frame cuts directly to a warmly lamplit bedroom, holding a steady medium close-up on an older man with long gray hair and a full white beard, seated upright on the edge of a metal-framed bed dressed in pink sheets and floral pillows. He wears an unbuttoned black-and-gray plaid flannel over a red T-shirt bearing a small white circular graphic, with two bedside lamps casting a gentle glow over framed photographs and scattered clothing. Looking slightly off-camera to his right, he delivers a gravelly, affectionate line with sincere warmth: “You really pulled it off, Bryson.” The subdued piano theme continues quietly beneath his words, underscoring the cross-cultural celebration of family prosperity and personal achievement that ties the two intimate moments together.","video_1_relative_path":"videos/7d31f96d51579588.mp4","video_2_relative_path":"videos/200ce6a4aadf978d.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/voiceover/voiceover_6/example.json::00000099","text_prompt":"Cinematic drama, captured with a 50mm lens and shallow depth of field, opens in a dimly lit, upscale venue awash in saturated magenta and violet bokeh against a palette of deep reds, purples, and blacks. A static medium close-up frames a fair-skinned man with light-brown hair, wearing a dark-gray suit jacket over an open-collared white shirt. His head is bowed and shoulders hunched in dejection as a calm, neutral male Mandarin voice-over begins, stating “三观尽碎的马克起身准备离场。” Beneath the narration, a soft, slow piano melody plays quietly. The man lifts his gaze toward someone off-screen to his right, his expression tightening into restrained anger as his lips part. He speaks in a measured, accusatory tone with a firm American accent, “You think I’m a parasite, don’t you, Mr. Baum?” The narration ceases, leaving only the gentle piano underscore to fill the tense silence.\n\nA straight hard cut reveals the addressee in a matching close-up against a darker, less illuminated background. The East Asian man wears a charcoal suit, white shirt, and patterned tie, offering a faint, knowing smile as he replies in a calm, evenly paced, and mildly sardonic voice, “But, apparently, society values me very much.” The subdued piano persists at a low volume, underscoring the dramatic irony of the exchange. The camera remains completely static throughout, emphasizing the emotional isolation created by the key lighting and blurred background. The frame holds briefly on the second man’s composed face before cutting to black.","video_1_relative_path":"videos/a2b93a4517fccc9d.mp4","video_2_relative_path":"videos/a986f14fd6eaa22c.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/voiceover/voiceover_7/example.json::00000019","text_prompt":"Cinematic drama, shot on a 50mm lens with naturalistic lighting, opens on a medium shot of a middle-aged, fair-skinned man seated alone at a small white round table on an outdoor terrace under an overcast sky. He wears a light-blue-and-white check-pattern button-down shirt with sleeves rolled to the forearms and a dark wristwatch on his left arm, his hands gently cradling a grey ceramic mug on its saucer while a black smartphone lies face-up beside it. Behind him, a black metal railing frames a softly blurred city skyline of high-rises. His brows are slightly knit and lips pressed, conveying quiet concern as a faint, low-volume electronic synth pad establishes a subdued, somber ambience that will persist throughout. A calm, reflective male Mandarin voice-over begins, stating “买账的却都是纳税人。” (“…but in the end it’s always the taxpayers who foot the bill.”).\n\nThe image cuts abruptly to a tight close-up of a different man, early to mid-thirties with a short dark buzz cut and clean-shaven, standing outdoors against a weather-worn pale stone wall textured with vertical grooves and scattered cracks. He wears a dark maroon short-sleeved collared shirt and a silver metal-link watch on his left wrist, holding a black smartphone to his right ear. Natural daylight casts soft shadows across his face as he speaks forcefully, eyes narrowed and jaw set, his brow furrowed in anger. … a strained, indignant male English caller …: “But at least we’re going to see some of them go to jail.” The continuous atmospheric music underscores his accusatory delivery as the static camera holds on his mid-gesture, the cool greys and muted blues of the terrace giving way to warmer earth tones to subtly shift the mood from introspection to confrontation.","video_1_relative_path":"videos/a728222e28a6a2cc.mp4","video_2_relative_path":"videos/65c35d914df36f34.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/voiceover/voiceover_7/example.json::00000076","text_prompt":"Cinematic industrial thriller sequence. The scene opens in a dim, bluish-green industrial interior, captured in a locked low-angle close-up that frames two feet planted firmly on rough concrete. At screen left, a right foot is sheathed in a polished brown leather dress shoe with trousers neatly tucked inside, while at screen right, a left leg is encased in a dark blue orthopedic walking boot, its sole resting flat against the ground. Beneath this stark visual contrast of pristine footwear and clinical rehabilitation gear, a faint, tense electronic drone hums through the space. A calm, neutral male voice-over in Standard Mandarin begins, stating, \"He tried it on, and indeed, he looks like a recovering patient.\"\n\nThe perspective shifts to a static wide shot that reveals a cavernous, sparsely furnished warehouse or shooting range defined by pale grey brick walls, concrete pillars, and scattered equipment like black crates, a wheeled cart, and distant target boards bearing human silhouettes. Harsh sidelight from high windows cuts across the floor, casting long, dramatic shadows. Center-frame stands a young man with short light-brown hair, wearing a cream button-down shirt with sleeves rolled to the elbows, khaki cargo trousers, a black belt, and the same dark blue walking boot on his left foot. His hands rest in his pockets, his shoulders slightly hunched as he gazes downward at the boot in quiet contemplation. The low-frequency musical bed continues to swell, unifying the sterile lighting and sparse props to evoke a sense of clandestine preparation and covert tension.\n\nA final cut introduces a medium shot of an older, balding man seated behind a waist-high metal grid cage. He sports a trimmed beard, a light collared shirt beneath a dark vest, and a silver wristwatch on his left arm. Leaning back with his arms folded, he smiles broadly and speaks in a measured, lightly accented English, noting, \"The scanner will pick up the metal components.\" His delivery is matter-of-fact yet faintly sardonic, underscoring the underlying theme of deception and containment. An ambient synth pad sustains beneath his words, maintaining the subdued, suspenseful atmosphere as the scene holds its quiet, watchful stillness.","video_1_relative_path":"videos/8b2e5c5d8d61fa96.mp4","video_2_relative_path":"videos/9ea7a9baa379d787.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/voiceover/voiceover_8/example.json::00000036","text_prompt":"Cinematic military drama, captured on a 50mm lens under bright, cloudless daylight. The sequence opens in a tight close-up on the weathered face of an older East Asian general, his eyes moist and bloodshot, brows deeply knotted, lips pressed in restrained grief and resolve. He wears a green greatcoat with a dark fur collar catching the harsh sunlight, topped by a peaked cap adorned with a red band and intricate gold braiding. A calm, authoritative male Mandarin voice begins, stating \"画面你们自己看\". The audio remains starkly silent otherwise, leaving only his measured breath and the weight of the moment.\n\nThe camera cuts to a medium two-shot, pulling back to reveal rolling, forest-covered hills beneath the same clear blue expanse. The general remains in the foreground, his back and shoulders framing the left side of the image as he faces his visitor. Standing opposite him is a heavier-set middle-aged officer in grey-green camouflage fatigues, his uniform marked by red-and-yellow epaulettes and a red chest patch bearing yellow stars, signaling high command. A younger soldier stands slightly behind, holding a black assault rifle at rest. A deep, formal male English voice with a slight non-native accent speaks with solemn respect: \"General, your son was a brave soldier.\" The scene is stripped of all music and ambient noise, relying entirely on the visual tension between the two figures and the quiet gravity of the delivery to drive the emotional pivot from private sorrow to public acknowledgment.","video_1_relative_path":"videos/21a3bb5c17276f80.mp4","video_2_relative_path":"videos/3f87b5d0077d6107.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/voiceover/voiceover_8/example.json::00000053","text_prompt":"Cinematic night scene, static medium-close over-the-shoulder shot with shallow depth of field, framing a young woman with dark hair in a low ponytail as she faces a man seated opposite her outside a brightly lit convenience store entrance. Cool fluorescent light spills from the doorway, illuminating shelves of yellow and white cartons and several red plastic buckets on the pavement, while the vivid blue of the man’s cartoon-print T-shirt and the warm tones of their faces create a subtle visual contrast against the mundane commercial backdrop. The woman’s face is wet with tears, her eyes glistening and lower lip quivering as she speaks in a soft, trembling Mandarin voice, \"想办法.\" Simultaneously, a calm, studio-quality male narrator overlays the moment with a subdued, sorrowful tone, stating, \"他不知道妈妈为什么会这么难过.\" A faint, steady low-frequency hum of distant traffic or an air-conditioning unit underscores the quiet tension, grounding the raw, on-location dialogue in a realistic environment.\n\nWithout camera movement, the woman raises her right hand to gently wipe a tear from beneath her left eye and brushes stray hair from her cheek, her expression shifting from pain to quiet resolve. The man watches her intently, his brows knit and mouth pressed in concern, while behind him through the glass door, rows of cardboard boxes and a slightly out-of-focus red sign reading \"Cute\" hang in the store’s interior. She lowers her hand but holds his gaze, her voice firming slightly through her tears as she declares, \"我会筹到钱。\" The narrator resumes for a brief moment, his reflective tone trailing into a melancholic completion: \"也不知道成年人该如何独自面对生活的重担。\" The shot holds steady on their silent exchange, the juxtaposition of polished narration and unvarnished emotion capturing a poignant moment of familial sacrifice and resilience.","video_1_relative_path":"videos/459fcc70948ea537.mp4","video_2_relative_path":"videos/39fb1a80e8863b1f.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/voiceover/voiceover_9/example.json::00000087","text_prompt":"Cinematic widescreen 16:9 frame opens in a warmly lit, wood-paneled study reminiscent of a vintage hotel suite, rendered in rich earth tones and bathed in the soft, golden glow of two brass wall lamps with white shades. A dark-haired man in a grey long-sleeved shirt lies prone on a chaise lounge, propped on his elbows as he quietly studies a large open book or sketchpad illuminated by the practical lighting. At the rear of the frame, near a closed wooden door, a light-brown-haired man in a black high-collared shirt stands watching with a neutral, attentive posture. A calm male Mandarin voice-over begins, stating “Peter had already witnessed all of this.” Beneath the hushed atmosphere, a steady, low-level electronic hum underscores the scene as the room remains still, the ambience thick with quiet concentration and unspoken tension.\n\nA hard cut shifts the perspective to a tighter medium close-up of the standing man, where soft key lighting from camera left models his features while casting gentle shadows across his opposite cheek. A measured, slightly questioning male English voice breaks the silence: “Was that Meredith?” Without breaking the frame, he shifts his gaze fractionally downward, his expression tightening briefly before softening into contemplation. A softer, contemplative male English voice murmurs to himself: “Was who Meredith?” Delivered with a rising inflection that conveys mild puzzlement, the line hangs in the sparse audio mix alongside the persistent electronic hum. The camera holds on his thoughtful expression as the image gently freezes, leaving the dramatic focus entirely on his internal realization.","video_1_relative_path":"videos/401931e204190689.mp4","video_2_relative_path":"videos/d6b3610e8979bd3d.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_davinci/multitalker/multitalker_2/example.json::00000019","text_prompt":"A cinematic scene set in a brightly lit civic testing center, captured with a medium-wide, slightly low-angled lens that slowly pushes in to a tighter medium shot. Even fluorescent overhead lighting casts a cool, shadow-minimal wash over warm wood-paneled lower walls and pale upper walls, establishing a balanced palette of rich browns, cool blues, and neutral grays. Behind a long, dark-brown wooden counter, an elderly balding man in a white shirt and dark vest leans forward with a warm, amused smile. Facing him, a young man in a navy polo with red and teal horizontal stripes rests a pen above a registration form, while a woman with long wavy brown hair, glasses, a purple patterned blouse, and a denim skirt holds an open booklet toward him. A calm, authoritative male voice begins, “I’m usually the one giving the tests, but today I’m taking one.” The room hums with the quiet ambient sounds of an administrative space: faint paper rustling, low chatter, distant shuffling, and the occasional click of ballpoint pens.\n\nAs the camera holds steady on the trio, the elderly man straightens slightly, his expression shifting to a firm yet genial authority. He delivers a crisp, measured command: “No talking.” The young man pauses mid-stroke, lifting his gaze toward the counter, while the woman lowers her booklet a fraction in acknowledgment. In the background, rows of brown plastic chairs hold other applicants quietly filling out paperwork, and a tall security officer in a light-gray shirt and striped tie stands watch near the rear wall. High above the entrance, a blue sign reads “TESTING AREA,” with a yellow vertical banner beneath it warning “DON’T DRINK AND DRIVE,” while a handwritten “SILVER” notice is taped to the left wood paneling. The scene closes on this restrained moment of bureaucratic irony, leaving the room’s quiet bustle and the subtle tension of enforced silence hanging in the air.","video_1_relative_path":"videos/b0605d8d68089ecb.mp4","video_2_relative_path":"videos/606edcc06257f1ee.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_davinci/multitalker/multitalker_4/example.json::00000060","text_prompt":"A single uninterrupted medium two-shot captures a brightly lit, shadow-free office space with pale green walls and white shelving units lined with binders, books, a model pirate ship, a robot figurine, and other decorative objects. Two young East Asian men stand side by side, facing slightly right of camera. The man on the left wears a blue denim jacket over a white T-shirt and maintains a neutral, attentive posture. Beside him, the man on the right, dressed in a vivid green hoodie with red hood lining and sleeve stripes and wearing yellow-tinted sunglasses, raises his right hand in a dismissive gesture. A calm, self-assured male Mandarin voice begins, stating \"No need.\" He then places his hand over his chest, his tone shifting to a wry, theatrical resignation as he continues, \"I have already become a mature spare tire.\" His delivery carries a measured, self-mocking humor, followed by a lightly determined declaration: \"I should learn to take the top spot myself.\" Faint room ambience underscores the dialogue, with no background music present, while the bright, even lighting highlights both faces clearly against the orderly background.\n\nThe speaker leans forward and wraps his arms around the denim-clad man in an exaggerated, playful hug, his voice warming with theatrical gratitude as he says, \"Thank you, Lawyer Zhang, for your kindness.\" The man in the denim jacket’s eyes widen and his mouth parts in surprise, his hands instinctively rising to rest on his friend’s back. Beneath the embrace, a brief burst of canned laughter cuts through the quiet room. Almost immediately, the denim-clad man’s expression hardens into irritation mixed with disbelief. He abruptly pushes the hoodie-wearer away with both palms, shoving him backward out of frame to the right with a soft thud. A forceful, irritated male Mandarin voice cuts in: \"Get the hell out of here.\" His shoulders tense and his brows knit as he watches the empty space where his friend just stood, the scene ending on his stunned, exasperated silence under the bright, even studio lighting.","video_1_relative_path":"videos/c4ab16feecc0362b.mp4","video_2_relative_path":"videos/4f9b3c9cc95f429d.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_davinci/multitalker/multitalker_5/example.json::00000001","text_prompt":"A static medium two-shot captures a dimly lit outdoor patio at night, where dense green foliage forms a dark backdrop crossed by faintly glimmering white fairy-lights. A bicycle leans quietly against the leaves, hinting at everyday life contrasting with the still, introspective moment. At frame-left stands Woman A, a young East-Asian woman with dark hair in a low ponytail, wearing a white tank top beneath brown overalls and an open pastel-striped cardigan, her hands resting casually in her pockets. Slightly to her right, Woman B sits on a wooden bench, her long wavy dark hair loose, dressed in a multicoloured patterned blouse, grey sleeveless vest, and light blue jeans. Low-key, cool-toned illumination softly highlights their faces while the verdant background melts into shadow, establishing an intimate, hushed nocturnal mood. The only sounds are a barely audible ambient hum and the quiet tension of the space.\n\nA calm, slightly defensive female Mandarin voice begins, stating, \"I am not an alcoholic. I only use it to help me sleep.\" As she finishes, Woman B lowers her gaze and shifts forward, resting her elbows on her knees in a posture of fatigue and distress. Her expression softens but remains troubled. After a brief pause, Woman B raises her head, meeting Woman A’s eyes. A firmer, mildly admonishing female Mandarin voice replies, \"那更不应该呀。\" Her delivery carries gentle reproach. The quiet room tone holds for a moment, broken only by a faint rustle of clothing as Woman B adjusts her posture.\n\nFollowing a short silence, Woman B exhales audibly—soft, weary—and a quiet, confessional female Mandarin voice resumes, completing the fractured thought: \"我从来都没有想过我会走到今天这一步。\" Her voice trails into vulnerability. Woman A listens intently, her stance unchanged and composed, as the fairy-lights continue to twinkle subtly behind them. The camera remains entirely still, allowing the emotional weight of their exchange to dominate the frame while the minimalist soundscape emphasizes the deeply personal nature of their conversation.","video_1_relative_path":"videos/2db9a528c07ab8aa.mp4","video_2_relative_path":"videos/cab26edcc405458d.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_davinci/multitalker/multitalker_6/example.json::00000016","text_prompt":"A warm, late-afternoon light bathes a gently curving, light-grey paved walkway bordered by dense green shrubbery on one side and pale residential buildings with flower boxes on the other. The camera tracks smoothly from behind as a woman with shoulder-length wavy blonde hair, wearing a sleeveless black lace-trimmed top and blue jeans, walks side-by-side with a clean-shaven man in a charcoal suit jacket and open-neck white shirt. She carries a dark cross-body bag and turns her head toward him as they stroll, her voice calm and reflective. A reflective female English voice begins, stating, \"What really surprised me is that I was dealing with life the same way I am now.\" Soft shadows stretch to their right, and the ambient soundscape of distant city murmur, faint traffic, and sporadic birdsong underscores their unhurried pace.\n\nA straight cut shifts to a frontal medium shot as the pair continues forward, now facing the camera. The woman places her right hand briefly over her chest for emphasis, her expression a blend of earnestness and gentle nostalgia, while the man listens attentively, offering a slight smile and occasional nods. In the background, another couple converses near the metal railing, beside which a circular red-and-white prohibition sign is mounted. She continues, her tone carrying a hint of wistful amusement: \"I was much more hopeful and naive back then, but the core, and the way I was feeling things, is exactly the same.\" The golden ambience and natural lighting reinforce the scene’s introspective mood, contrasting the quiet everyday realism of the urban setting with her personal reminiscence as the audio lingers on the resonance of her words.","video_1_relative_path":"videos/721fbc4f5f0373b0.mp4","video_2_relative_path":"videos/24528e873d10af01.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_davinci/multitalker/multitalker_6/example.json::00000038","text_prompt":"A widescreen 16:9 cinematic scene set inside a dimly lit car at night, filmed in a single continuous take from a fixed low angle on the dashboard looking forward through the windscreen. Shallow depth of field isolates the two occupants against a backdrop of blurred city lights and soft bokeh, while practical dashboard glow models their faces in high contrast. A dark-haired man in his mid-thirties sits on the right, turning slightly toward the blonde woman on the left with a half-smile of mild exasperation. Under a faint, steady engine hum, he remarks in a calm yet irritated baritone, “A bunch of amateurs.” Without breaking the frame, he leans fractionally closer, his tone sharpening but remaining controlled as he adds, “I mean, you’ve studied for Christ’s sake.” The passenger keeps her gaze fixed ahead, jaw set, absorbing the critique. Finally, she swivels toward him, eyes narrowing in annoyance, and cuts in with a brisk, clipped voice, “Could we stop talking about it now?” The tension instantly eases; the driver relaxes his expression, offering a brief conciliatory nod and a small smile before answering curtly, “Sure.” The quiet exchange plays out entirely through subtle facial shifts and restrained blocking, the ambient engine noise and distant city atmosphere remaining subdued beneath the foregrounded dialogue, capturing a micro-conflict that hints at an ongoing relationship shaped by professional expectations and quiet friction.","video_1_relative_path":"videos/b830bcae327c9900.mp4","video_2_relative_path":"videos/ac7167cd2f3c7734.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_davinci/multitalker/multitalker_7/example.json::00000013","text_prompt":"Cinematic domestic drama, captured on a 50mm lens with tight over-the-shoulder framing behind a man standing on the left. Diffuse daylight streams from a window at camera right, casting soft shadows across pale blue-grey tiled walls and a white glass-door cabinet, while a muted palette of whites, greys, and browns is subtly punctuated by a red dish towel and green spice jars. In front of him, a young woman with dark hair tied in a loose bun and straight bangs stands slightly right of center, wearing a white rib-knit sweater with semi-sheer lace sleeves. Her arms are folded tightly across her chest, gaze fixed downward on a quiet stainless-steel pot on the stovetop. The ambient room tone is hushed and tense. A low, irritated adult male Mandarin voice, mid-pitch and slightly raspy, begins with clipped emphasis: “那张丧脸还牛。”\n\nA straight cut reverses the perspective to a medium close-up of the man, now framed from the mid-torso up, his dark brown turtleneck contrasting sharply with the cool background. He continues without pause, his voice rising in exasperation with sarcastic, brisk pacing: “牛的都快上天了，不就有几个臭钱吗？” Throughout his tirade, the woman’s profile remains visible at the frame’s edge, her eyes lowered, jaw tense, and shoulders rigid. The scene then cuts back to the original over-the-shoulder angle as the man falls silent. The woman finally lifts her head, her eyes widening in sudden realization. After a brief, sighing intake of breath, a young adult female Mandarin voice, mid-high pitch and clear, shifts from defensive to conciliatory, delivered with firm but soft pleading: “行了，你别这么说了，那是你亲妹。” Her eyebrows lift slightly as she speaks, the quiet domestic setting grounding the emotional weight of her intervention. The sequence closes on her earnest expression as the man listens in silence, the camera remaining static to emphasize the raw vocal nuance and unspoken tension between them.","video_1_relative_path":"videos/8f24480037178ab9.mp4","video_2_relative_path":"videos/5ab241d35ee3cb1b.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_davinci/multitalker/multitalker_8/example.json::00000086","text_prompt":"Cinematic medium-close two-shot, locked-off at eye level, set in a sparsely furnished, sun-lit makeshift office. Natural daylight pours from camera-left, casting bright highlights and soft shadows across muted interior tones of brown, grey, and green, with a shallow depth of field keeping both subjects sharp against a softly blurred window glow. In the foreground, a younger man with short dark hair and light stubble wears a black hoodie with a red lining printed in bold black lettering; he leans forward, elbows near his knees, fingers pressed nervously to his lips as he stares off-screen left. Behind him, an older bald man in rimless glasses and a green-and-white vertical-striped button-down shirt faces the same direction. Between them sits a battered cabinet holding a small wood-grain CRT television, initially showing a grainy black-and-white close-up of a person’s profile. A faint, low-level hiss fills the quiet room as the older man begins to speak in a calm, corrective tone, stating “Chili powder.”\n\nThe camera remains completely still as the older man finishes the phrase and pauses, allowing the television screen to flicker and transition into a vivid color image of a clear glass vase filled with yellow flowers against a white background. The younger man’s tense posture persists, his wide eyes and covered mouth betraying his anxiety. The older man resumes, his voice steady but edged with frustration: “Did I not already tell you how moronic that was, before we even started?” The audio cuts off abruptly mid-thought, leaving a heavy silence while the frame stays locked on both men frozen in place. The high-key illumination and gentle chiaroscuro emphasize the psychological tension between them, while the sudden shift from monochrome human profile to bright floral still life on the television reinforces a stark contrast between personal conflict and trivial distraction, concluding the scene in quiet, observational stillness.","video_1_relative_path":"videos/38b8cefeb08133af.mp4","video_2_relative_path":"videos/8fe31e127fa942e7.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_davinci/voiceover/voiceover_1/example.json::00000018","text_prompt":"A cinematic thriller sequence opens with a desaturated palette of cool blues and muted earth tones, captured on a fixed lens under soft overcast daylight that flattens shadows and lends a stark, clinical quality to the frame. An extreme close-up holds on the right side of a middle-aged man’s face, his pale, faintly stubbled skin illuminated by the diffused light. His brow is furrowed and his jaw set, conveying grim determination as a low-volume, tense electronic drone begins to underscore the moment. A measured male Mandarin voice-over begins, stating, “Kellerman wants to take this opportunity to suffocate Lincoln.” The camera then executes a hard cut to a detached high-angle medium shot looking straight down onto a patch of dry, yellow-green grass.\n\nFrom above, the same man is seen kneeling beside a supine figure whose dark blue jacket and bright yellow inner garment are starkly contrasted by vivid red blood staining the upper chest and neck. The victim’s hands are secured behind their back with silver handcuffs as the attacker grips a black leather glove on his right hand and presses it firmly over the victim’s mouth and nose. A sharp, wet impact punctuates the motion, immediately followed by a brief, muffled gasp, while the ominous musical pulse continues to swell. The camera holds steady as the attacker maintains his pressure, the victim’s body twitching once before falling still. Over this frozen tableau, a lower-pitched, calm English male voice speaks quietly, “It was very peaceful,” his detached delivery contrasting sharply with the brutal stillness beneath the gloved hand. The ambient score sustains its low-frequency tension, leaving the frame locked on the lifeless figure as the scene fades into silence.","video_1_relative_path":"videos/b6c2b1849dcc048a.mp4","video_2_relative_path":"videos/9984740fd53e64a2.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_davinci/voiceover/voiceover_1/example.json::00000042","text_prompt":"A historical-fantasy sequence, shot on a 35mm lens with soft, diffused daylight and an earthy palette of muted greys, warm beige, and natural greens, opens in a sun-dappled field of tall grass and scattered weeds. A low-angle medium frame elevates a solitary figure clad head-to-toe in ornate, dark-grey metallic armor etched with intricate relief patterns. The helmet’s visor conceals the wearer’s face, leaving only a human silhouette kneeling on one knee and bowing deeply toward someone just out of frame at screen left. At the extreme left edge, the torso and arm of a second individual are visible, dressed in a white blouse with delicate lace trim beneath a brown, fur-edged cloak fastened by a red cord. A calm, neutral female Mandarin voice-over begins, her measured and advisory tone stating, \"I hope he no longer risks his life for those who aren't worth it.\" The surrounding ambience remains deliberately silent, focusing all attention on the visual weight of the exchange.\n\nA straight cut shifts to a tight close-up of a young woman standing amid the same verdant backdrop. Her fair skin contrasts with neatly styled black hair gathered into an up-do, straight bangs framing a thoughtful expression as she looks downward and slightly to her right, lips parted as though finishing a thought. Natural light illuminates her face evenly against a softly blurred background, isolating her emotionally charged presence. The female voice continues, now delivered directly by the on-screen woman in a quieter, more personal register, her earnest tone carrying a hint of concern as she adds, \"Your enemy is on our side.\" The camera lingers on her face, capturing a dynamic of power and vulnerability, while the deliberate silence and somber lighting deepen the contemplative mood of a pivotal conversation about loyalty and sacrifice.","video_1_relative_path":"videos/6efb0d282b20d14a.mp4","video_2_relative_path":"videos/cdd79c1ace2866c3.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_davinci/voiceover/voiceover_2/example.json::00000069","text_prompt":"Cinematic medium close-up, naturalistic lighting, and a subdued palette open on a middle-aged East Asian man indoors, framed from the mid-chest upward. He wears a dark navy-to-black rib-knit sweater layered over a lighter crew-neck undershirt, holding a silver smartphone to his right ear, a plain silver ring catching the light on his ring finger. Soft, diffused daylight spills from camera left, illuminating the left side of his face while casting the right in a gentle shadow, establishing a subdued and slightly tense atmosphere. The background remains softly blurred, revealing muted interior décor and the warm glow of a lamp that hints at a quiet residential setting. Over this intimate portrait, a calm, neutral female Mandarin voice-over begins, stating, \"She told her husband, A Qiang.\"\n\nA straight cut shifts the perspective to the interior of a modern car, viewed from the rear passenger seat. The cabin is dimly lit, suggesting late afternoon or early evening, with cool ambient light filtering through the front windshield. In the left foreground, the driver’s silhouette is visible, his head turned toward the road ahead. Dominating the dashboard is an illuminated infotainment touchscreen displaying large icons for Navigation, Radio OFF, and Media, alongside a digital clock reading 6:14 PM. The atmosphere grows contemplative as the cool, low-key lighting contrasts sharply with the warmth of the previous scene. A middle-aged male voice, speaking in a clear, measured General American accent, breaks the quiet silence: \"Will you stay for the actual interview, or are you leaving by then?\" The delivery carries a mild, inquisitive tone, recorded cleanly without background noise, leaving the weight of the conversation to hang in the still air.","video_1_relative_path":"videos/3565ae320d3263f4.mp4","video_2_relative_path":"videos/d2a22e4464686f2e.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_davinci/voiceover/voiceover_2/example.json::00000082","text_prompt":"Cinematic night scene, static medium-close over-the-shoulder shot with shallow depth of field, framing a young woman with dark hair in a low ponytail as she faces a man seated opposite her outside a brightly lit convenience store entrance. Cool fluorescent light spills from the doorway, illuminating shelves of yellow and white cartons and several red plastic buckets on the pavement, while the vivid blue of the man’s cartoon-print T-shirt and the warm tones of their faces create a subtle visual contrast against the mundane commercial backdrop. The woman’s face is wet with tears, her eyes glistening and lower lip quivering as she speaks in a soft, trembling Mandarin voice, \"想办法.\" Simultaneously, a calm, studio-quality male narrator overlays the moment with a subdued, sorrowful tone, stating, \"他不知道妈妈为什么会这么难过.\" A faint, steady low-frequency hum of distant traffic or an air-conditioning unit underscores the quiet tension, grounding the raw, on-location dialogue in a realistic environment.\n\nWithout camera movement, the woman raises her right hand to gently wipe a tear from beneath her left eye and brushes stray hair from her cheek, her expression shifting from pain to quiet resolve. The man watches her intently, his brows knit and mouth pressed in concern, while behind him through the glass door, rows of cardboard boxes and a slightly out-of-focus red sign reading \"Cute\" hang in the store’s interior. She lowers her hand but holds his gaze, her voice firming slightly through her tears as she declares, \"我会筹到钱。\" The narrator resumes for a brief moment, his reflective tone trailing into a melancholic completion: \"也不知道成年人该如何独自面对生活的重担。\" The shot holds steady on their silent exchange, the juxtaposition of polished narration and unvarnished emotion capturing a poignant moment of familial sacrifice and resilience.","video_1_relative_path":"videos/11fb091d86facafa.mp4","video_2_relative_path":"videos/b67e26ec981b651c.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_davinci/voiceover/voiceover_2/example.json::00000092","text_prompt":"Cinematic scene in a contemplative drama, captured in a single continuous medium shot with natural daylight casting soft, even illumination across a weather-worn courtyard porch. The palette leans into warm earth tones, featuring faded red-pink stucco walls, muted greens on the foliage and doorframe, and rustic wooden furniture. An older man in his late sixties, wearing a black beret, a beige knitted vest over a purple-and-white plaid shirt, and dark trousers, stands just outside a green-framed doorway that opens into a warmly lit interior lined with bookshelves. A calm, reflective Italian baritone from the older man states, \"Con la semplicità o la complessità delle cose.\" Behind him, slightly out of focus, a younger man with dark wavy hair steps through the doorway, dressed in a light grey T-shirt under a tan blazer and light jeans, carrying a brown leather satchel across his shoulder while holding a matching flat cap in both hands. A faint rustle of clothing accompanies his entrance. The older man turns rightward, lowers himself onto a simple wooden chair near a low table, and settles with a quiet sigh. The camera executes a gentle pan to keep both figures centered as the younger man remains standing, his eyes crinkling with a gentle, warm smile while he relaxes his posture and shifts his weight. As the ambient daylight continues to emphasize the textured walls and the quiet intimacy of their familiar, mentor-like dynamic, a neutral adult male Mandarin voice-over begins, stating, \"马里奥又问及了昨天看到的诗句。\" The scene holds steady on the seated elder with his back partially turned to the camera, the younger man still smiling in place, underscored only by the fading tail of the Italian speech, the soft exhalation, and the sparse, realistic ambient sounds that deepen the contemplative mood.","video_1_relative_path":"videos/4211c0c42238a05e.mp4","video_2_relative_path":"videos/e9626767d583a547.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_davinci/voiceover/voiceover_3/example.json::00000065","text_prompt":"Widescreen 16:9 cinematic framing, shallow depth of field, and soft frontal lighting from overhead fluorescents establish an intimate, tense atmosphere in a modest cafeteria. The background dissolves into a soft bokeh of blurred tables and distant patrons, keeping the visual focus locked on two East Asian men seated across from each other. On the left, an older gentleman in his late fifties wears a dark olive-green short-sleeved shirt and a small white earring in his left ear, his forehead lined with age. He leans forward, brows knitted and eyes narrowed, his medium-low Cantonese-accented voice cutting through the quiet room with controlled anger. A reproachful male voice states, \"You actually fool even the dead!\" Across the table, the second man remains perfectly still, head bowed in silent absorption, his presence anchoring the heavy atmosphere.\n\nThe camera holds its static position, capturing only the subtle shifts in the speaker’s expression as his delivery slows and hardens into stern admonition. The ambient hum of the eatery fades into the background, leaving only the weight of his words. A firm, didactic male voice continues: \"If you want others’ respect, you must first respect yourself.\" The muted earth tones of the setting—the olive shirt, the neutral walls, the soft even lighting—mirror the grounded, principled rebuke, leaving both men frozen in a moment of quiet tension as the final syllable hangs in the air.","video_1_relative_path":"videos/3f057e256fd5356e.mp4","video_2_relative_path":"videos/82b13e1606266d88.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/instruments/instruments_1/example.json::00000062","text_prompt":"A high-energy pop-rock performance unfolds in a dimly lit studio captured through a static overhead lens with a subtle fisheye distortion. A single top-down spotlight isolates a full drum kit against a dark, wood-paneled floor, leaving the surrounding cables and microphone stands swallowed in shadow. Behind the kit, a male performer in a plain white T-shirt and dark jeans sits upright, his posture relaxed yet poised for precision. The track launches immediately with a driving four-on-the-floor kick, a crisp snare backbeat, and steady eighth-note hi-hat pulses layered over a bright electric-guitar riff and a tight bass line. Over this rhythmic foundation, a male tenor vocalist enters with clear enunciation and moderate vibrato, singing, \"Holding you tightly, afraid to lose control,\" his phrasing perfectly aligned to the straight-eighth groove.\n\nAs the verse progresses, the drummer intensifies his pattern with wrist-driven ghost notes on the snare and rapid micro-movements that keep the hi-hat consistently open, producing a tight metallic sizzle. His shoulders rise and fall with each stroke, and his head nods visibly in time with the downbeats. The vocalist sustains the next phrase, singing, \"’cause everything that you thought I would be,\" while the drummer responds by driving harder into the snare on the backbeats and executing a quick snare-to-tom fill that bridges the emotional peak. The focused key light catches brief, sharp flashes from the cymbals with every strike, visually punctuating the rhythmic accents. The mix remains clean and compressed, with the forward, slightly nasal vocal sitting prominently above the punchy low-end and sharp high-frequency shimmer.\n\nThe arrangement swells as the guitarist’s two-bar motif loops and the bass line anchors the harmonic progression, pushing the track toward its natural resolution. The drummer increases his striking force, his wrists snapping for staccato attacks and his arms lifting higher for the final accents, while the vocalist elongates the last syllable with a subtle upward pitch glide before resolving downward. Just as the rhythm reaches its full intensity, the entire mix cuts off abruptly mid-measure, leaving the final chord and the drummer’s decaying tom hit hanging in the sudden silence. The scene holds on the static overhead frame, preserving the controlled studio atmosphere and the raw, synchronized energy of the performance.","video_1_relative_path":"videos/f20fc08b77ca6fe5.mp4","video_2_relative_path":"videos/dee266846d4e69db.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/instruments/instruments_2/example.json::00000007","text_prompt":"Cinematic close-up, fixed medium-close framing, neutral even lighting, and a clean, uncluttered palette establish an intimate performance space. A young woman stands upright with relaxed shoulders, her face out of frame, holding a vibrant red hollow-body mandolin against her torso. The camera remains completely still, locked on her hands and the instrument’s ornate blue-green scroll, which catches the light without glare. Behind her, rows of black hard-shell instrument cases line the wall vertically, two Union Jack tags hanging from the handles. As the scene opens, a bright, metallic mandolin tone erupts at full volume, dry and close-miked with zero ambient reflection.\n\nHer right hand drives a relentless alternate-picking pattern with metal picks, striking the strings just above the soundhole in a crisp, rapid flurry that matches a brisk tempo. The left hand shifts swiftly up and down the fretboard, executing quick chord changes and smooth slides that trace a melodic contour rising in pitch before landing on two pronounced, accented peaks. The performance flows into a legato-like descending phrase, where the left hand glides downward and the right hand maintains its steady rhythm, softening the dynamic slightly as the notes connect. Every pick strike produces a sharp transient against the silent background, accompanied by the faint mechanical click of fingers lifting from the frets.\n\nThe sequence resolves on a single sustained tonic note, both hands holding their positions momentarily before the right hand rests lightly over the strings. The tone rings clearly, decaying naturally into absolute silence as the frame lingers on the static composition. No breaths, chair creaks, or environmental sounds break the quiet; the camera remains fixed on the performer’s relaxed posture and the instrument, leaving only the clean, resonant aftermath of a virtuosic showcase.","video_1_relative_path":"videos/f41fc7fc6b5596c1.mp4","video_2_relative_path":"videos/f200d51178a88886.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/instruments/instruments_2/example.json::00000031","text_prompt":"Cinematic medium close-up, fixed tripod shot at eye level, framing a seated guitarist against a black wall patterned with repeating raised squares. Soft frontal illumination highlights the rich wood grain and gold hardware of a hollow-body electric guitar, casting uniform shadows across the background while keeping the performer’s head cropped out to focus entirely on the hands and instrument. The musician, dressed in a dark gray button-down over a black undershirt and blue jeans, sits upright with the guitar resting on the right thigh, neck angled slightly upward for ergonomic access. The performance begins with a brisk, even rhythm as the right-hand pick strikes the wound low strings, producing a bright, slightly metallic attack that blooms into a warm sustain. A walking bass line anchors the groove, with clear root notes on the downbeats and chromatic passing tones weaving through the off-beats, all captured in a clean, close-miked studio environment with a subtle plate-style reverb adding spatial depth. As the piece progresses, the left hand glides smoothly up the fretboard to the seventh through ninth positions, executing a fluid legato phrase built on hammer-ons and pull-offs. The right hand alternates between precise single-note picking and light arpeggiated strums, maintaining a moderate tempo while the melodic contour gently rises before resolving downward in harmony with the implied jazz-blues progression. Approaching the conclusion, the left hand settles near the fifth and sixth frets to articulate a descending cadential figure, outlining a V–I resolution before settling into a held chord. The right hand eases its pressure for a gentle decrescendo, fingers relaxing slightly as the pick lifts just enough to mute the strings, allowing the full-bodied resonance to fade naturally into the room’s short reverb tail. Throughout the sequence, the camera remains completely still, emphasizing the polished technique, dynamic control, and seamless transitions of a confident solo performance.","video_1_relative_path":"videos/2dd7c343e01aae7f.mp4","video_2_relative_path":"videos/5ba10b41ba9f8521.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/instruments/instruments_2/example.json::00000074","text_prompt":"Cinematic outdoor scene, shot on a 35mm lens with soft, diffused overcast lighting and a muted, earthy palette. Four adult French-horn players stand in a shallow arc on a mountain overlook, their instruments held at chest level with bells angled upward, while a small girl in a purple coat and pink knitted hat stands centered before them, watching with quiet intensity. The camera opens in a medium-wide shot, then begins a gentle leftward pan while slowly dollying in. As the ensemble initiates a full-bodied low-register chord, the attack is perfectly synchronized, the brass resonance blooming into a slow, legato melody that floats through the thin mountain air. The melody ascends with a rubato, expressive pulse, each player’s left hand moving with precise, incremental valve adjustments while steady airflow connects the phrases in smooth legato. Faint valve clicks and soft inhalations punctuate the natural micro-pauses between phrases, grounding the performance in tactile realism. As the musical line climbs toward a modest climax, the musicians lean minutely forward, tightening their embouchures to brighten the tone and increase volume. The girl remains nearly still, her hands clasped as she tilts her head slightly to follow the shifting harmonies, her posture mirroring the ensemble’s focused discipline.\n\nThe final phrase descends gracefully, the brass timbre softening into a warm, rounded decay that lingers against the muted, hazy mountain backdrop. The players gradually relax their embouchures, angling their horns slightly downward as the sound fades into residual breath and the quiet hum of distant wind. The camera settles into its tightest framing, capturing the subtle release of tension in their focused eyes and relaxed jaws, along with fleeting, synchronized glances between the musicians. The performance concludes in stillness, the last horn tone dissolving naturally into the overcast atmosphere, leaving only the gentle rustle of the outdoor environment.","video_1_relative_path":"videos/ca09aa60c85fab89.mp4","video_2_relative_path":"videos/2f72fd0cbd53bfcc.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/instruments/instruments_2/example.json::00000086","text_prompt":"Cinematic showcase of American bluegrass tradition, captured on a high-resolution macro lens with crisp studio lighting that highlights the wood grain and metallic hardware against a neutral dark background. The scene opens on a tightly framed close-up of a black-and-sunburst mandolin, its carved body and fretboard filling the frame. Picture-in-picture insets frame the performer’s hands: the left hand glides along the neck with the thumb anchoring behind the frets while the fingers execute rapid hammer-ons, pull-offs, and scalar runs, and the right hand drives a steady, alternating downstroke and upstroke picking pattern. The audio is a bright, metallic, and resonant solo performance, maintaining a brisk tempo with an even eighth-note pulse and occasional syncopated accents. Each steel-string pluck strikes sharply and decays quickly, forming a continuous stream of evenly spaced notes that outline an energetic folk melody, punctuated by faint string squeaks during left-hand shifts and light vibrato on sustained tones. The camera holds static, allowing the rhythmic precision and clean, close-mic capture to take center stage.\n\nThe shot transitions to a full overhead view of the instrument resting motionless inside its open hard case, lined with plush red fabric. The music continues uninterrupted, the same brisk tempo and ringing tone persisting without visual motion, emphasizing the mandolin’s ornate headstock, f-holes, and sunburst finish. A closer, angled cut isolates the headstock and six gold tuning pegs, maintaining the static framing as the scalar runs and alternating picking pattern carry forward. Finally, the perspective shifts to a top-down view of the closed case. A hand enters from the left, grasps the brass latch, and rotates it clockwise. The moment the latch clicks shut, the music abruptly ceases, the sudden silence aligning perfectly with the mechanical closure to mark the definitive end of the session. The recording remains clean and consistent throughout, with no ambient noise or additional instruments, leaving only the crisp resonance of the steel strings fading into quiet.","video_1_relative_path":"videos/dd86910abbe761ea.mp4","video_2_relative_path":"videos/e9543825168b6e46.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/movie/movie_1/example.json::00000028","text_prompt":"A cinematic nighttime winter battlefield unfolds in cool blue-gray tones, punctuated by the orange glow of distant fires and explosions. Shot from a low ground-level angle behind a camouflaged tank, the frame captures its barrel aimed toward a burning village of thatched-roof huts. Soldiers clad in heavy white camouflage scramble around the armored vehicle, one scaling the turret while another mans a mounted machine gun. The air is thick with smoke and drifting snow, intermittently lit by muzzle flashes and firelight. An intense orchestral score drives the scene forward with fast-paced strings and pounding percussion, layered beneath deep artillery booms, sharp small-arms fire, and the metallic grind of tank treads over frozen ground.\n\nA sudden, massive detonation erupts near the center of the frame, hurling flames and debris skyward. The blast washes the scene in a brief, blinding orange flare before the cold blue palette returns. Soldiers react instinctively, diving for cover and bracing against the tank’s hull as the camera shakes violently to mirror the impact and surrounding chaos. The soundtrack swells with a brass crescendo and cymbal crashes synchronized with the explosion, followed by the high-pitched whine of shrapnel and the rattle of falling rubble. Ambient wind howls through the snow, mingling with the fading roar of the blast and the strained breathing of the troops.\n\nThe perspective tightens to a close-up of a soldier firing the heavy machine gun from atop the tank, his face partially hidden behind frost-covered goggles as he shouts orders lost to the overwhelming din. Rapid muzzle flashes strobe across his grim expression while another soldier sprints past in the foreground, rifle raised and kicking up plumes of snow. Quick pans and tilts track the movement, heightening the disorientation. The scene then shifts to a medium shot following two soldiers advancing side-by-side through the swirling snow, one gripping a submachine gun at the ready, their breath visible in the frigid air. Moving cautiously with bodies low and weapons trained ahead, they navigate the uneven terrain as the orchestral score recedes slightly, allowing the crisp crunch of boots on packed snow and the distant echoes of gunfire to emerge clearly beneath the relentless rhythm of combat.","video_1_relative_path":"videos/4c6c7b59f7f3647b.mp4","video_2_relative_path":"videos/2a3c0fc10bdf16aa.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/movie/movie_1/example.json::00000085","text_prompt":"A gritty urban thriller sequence opens on a high-angle wide shot looking down a narrow alley at the pale, overcast hour of dusk or dawn. Warm golden light from unseen windows and streetlamps slants across weathered brick façades, carving deep chiaroscuro shadows into the alley’s depths. The camera tilts downward to track a figure clad in dark clothing as they drop from an upper fire escape onto a corrugated metal awning. The impact rings out with a sharp metallic clang followed immediately by a dull thud, punctuated by a brief, strained grunt of exertion. As the figure recovers momentum, the camera shifts to a low-angle perspective, emphasizing the vertical drop, and sweeps alongside them swinging across the gap toward an opposing building. Their silhouette cuts against the bright sky, accompanied by a rapid, broadband whoosh that matches the velocity of the leap.\n\nJust before clearing the gap, the figure strikes a protruding fire escape ladder, triggering a heavy composite crash of scraping metal and splintering wood as they tumble downward. A hard cut drops the viewer to a static, eye-level wide shot at ground level, where the motionless body now lies on wet asphalt amidst scattered trash bags, cardboard, and loose planks. A single overhead lamp casts a pool of bluish-white light that pools in the puddles, heightening the grim, stark atmosphere. The soundtrack strips away all music, leaving only the visceral foley: the lingering reverberation of the final impact fading into near-silence, the low-frequency rumble of the distant city, and the occasional sharp echo of water dripping off concrete. The sequence closes in this heavy stillness, capturing the abrupt failure of an acrobatic pursuit and leaving the outcome unresolved but visually conclusive.","video_1_relative_path":"videos/0f004bbbb2dc4dce.mp4","video_2_relative_path":"videos/d87e57522863c7fc.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/movie/movie_2/example.json::00000057","text_prompt":"A medium close-up, eye-level shot captures a narrow metallic corridor with overhead ventilation grates, bathed in cool, even lighting that casts soft shadows across the brushed-steel walls. A man in a dark long-sleeved shirt stands before a wall-mounted rectangular panel and presses a latch with deliberate precision. A sharp metallic click rings out, immediately followed by a low-frequency mechanical whir and a faint scraping sound as the cover slides smoothly into its housing. The camera tracks a fraction forward, keeping him centered as his brow furrows and his lips part, eyes locked on the newly exposed recess. A subtle, low-volume ambient hum fills the confined space, grounding the scene in a dampened, machinery-heavy environment.\n\nHe reaches in and lifts a white storage box, rotating it until the lid faces the lens. Bold black marker lettering reads “DO NOT OPEN UNTIL THANKSGIVING!!” in uppercase, underscored by a small circular NASA insignia sticker. As the container settles into his hands with a soft thud, his expression softens from concentration to mild surprise, a faint smile touching his lips. The audio landscape remains sparse and tactile: the residual room tone, the subtle rustle of his sleeves, and his shallow, controlled breathing. The sterile, industrial atmosphere is quietly punctuated by the ironic holiday warning, blending routine technical procedure with a grounded sense of levity.","video_1_relative_path":"videos/f0bbd948c39348ad.mp4","video_2_relative_path":"videos/e93c66a6f840e9f1.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/movie/movie_3/example.json::00000017","text_prompt":"A sweeping high-angle wide shot establishes a sci-fantasy epic, opening on a vast, desolate battlefield under a hazy, smoke-choked sky. The dark, uneven ground is littered with debris, while multiple colossal glowing orange dimensional rifts dominate the background, bathing the scene in an ominous golden hue. A densely packed army of soldiers in dark armor stands in rigid formation, their upright spears forming a metallic forest, while smaller squads move with chaotic urgency in the foreground. Fiery projectiles detonate in the lower right, casting flickering orange light across the terrain as the camera begins a slow, deliberate pan upward and to the right. As the frame shifts, sleek, angular futuristic aircraft carve through the air between the luminous portals, and on the far right, a colossal figure clad in red and gold armor stands utterly motionless, towering over the chaos like a silent sentinel. The lighting dynamically shifts with the camera movement, emphasizing the stark contrast between the encroaching darkness and the brilliant, otherworldly glow of the rifts.\n\nThe soundscape opens at full force with a thunderous symphonic score, driven by pounding timpani, aggressive brass fanfares, and rapid, tense string ostinatos that mirror the visual escalation from static formation to battlefield movement. A deep, resonant wordless choir swells beneath the instrumentation, adding gravitas to the mounting tension, while a constant low-frequency rumble of distant artillery and heavy machinery underpins the entire scene. Sharp, percussive cracks resembling cannon fire or magical impacts punctuate the mix, perfectly synchronized with the visual bursts of fire on the ground. The audio remains dense and cinematic, with clear separation between the orchestral layers and environmental effects, creating a broad, immersive stereo spread that conveys urgency, grandeur, and foreboding. With no dialogue present, the music and layered sound design serve as the primary narrative driver, establishing this monumental pre-battle assembly as the opening sequence of a larger, epic conflict.","video_1_relative_path":"videos/d7245022f80ea3a0.mp4","video_2_relative_path":"videos/3cd74428332f8b02.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/movie/movie_5/example.json::00000002","text_prompt":"Cinematic thriller sequence, captured on a low-angle lens with cool, greenish fluorescent lighting in a dimly lit concrete tunnel. The camera looks up at the front of a white double-decker bus, its destination panel glowing with route number 102 and the bilingual markers for Shau Kei Wan. On the upper deck, a man in a dark vest over a light shirt leans forward through the windshield, aiming a handgun downward toward the street level below. The environment is tense, underscored only by a faint mechanical hum from the idling bus engine, until a sudden burst of automatic gunfire erupts from off-screen right. Bright muzzle flashes and violent bullet impacts shatter the tunnel wall, sending concrete shards and smoke billowing outward. A sharp metallic clang rings out, quickly followed by a heavy thud that suggests a body striking the ground. The perspective widens to reveal a gridlocked traffic queue ahead, where sedans, SUVs, and a yellow minibus bearing a red Mong Kok sign sit trapped in the chaos. Figures clad in tactical gear sprint between the vehicles, some crouching behind doors for cover while others advance cautiously through the drifting haze.\n\nThe camera drops to ground level near a black SUV parked along the curb, its driver-side window already marred by a small circular bullet impact. A figure in full black tactical gear sprints past from right to left, boots pounding sharply against the concrete as echoing footsteps layer over the lingering hiss of escaping gas from ruptured pipes. A single, loud crack echoes through the enclosed space—a close-range gunshot—immediately followed by a guttural male grunt of pain and exertion. Another dark-clad individual rushes past the lens in a blur of motion, weapon drawn, his face strained and mouth open in a silent shout lost to the ambient chaos. Behind him, scattered silhouettes flee deeper into the tunnel, their forms swallowed by swirling dust and fading light reflections. The scene’s raw, unscored realism peaks as a brief, high-pitched electronic alarm tone pierces the air, then cuts abruptly to silence as the frame freezes on the fleeing silhouette.","video_1_relative_path":"videos/963da3153420c854.mp4","video_2_relative_path":"videos/2ea6a4b862ad67a0.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/movie/movie_5/example.json::00000083","text_prompt":"Gritty urban action sequence, framed with a 35mm lens and a handheld kinetic aesthetic under overcast daylight that gradually catches the flickering orange glow of a burning blue bus. The scene opens with a low-angle medium shot of a man perched on the roof of a dark vehicle beneath a rust-stained steel bridge, clad in a black beanie, dark tactical jacket, grey pants, and fingerless gloves. He grips a large multi-barrel rotary machine gun fed by a backpack-mounted ammo supply, his jaw set and expression focused as he unleashes a relentless barrage. The camera holds steady as the perspective widens to a street-level view, revealing the overturned, flame-engulfed bus and two figures kneeling on the asphalt, aiming rifles upward toward the bridge. Brick buildings, parked cars, and green trees frame the chaotic urban tableau as the audio swells with the deep thumps and rapid mechanical cycling of the rotary cannon, layered with crackling fire, distant debris impacts, and the sharp metallic pings of bullets striking nearby surfaces. The viewpoint cuts inside the burning bus, where a figure in dark clothing sprints past through shattered windows, partially obscured by smoke and strobing firelight. Sparks rain down into the cabin as the camera returns to a tight low-angle close-up of the shooter, his face intermittently illuminated by violent muzzle flashes. The lens pushes in to an extreme close-up of the rotary barrel spinning rapidly, glowing red-hot at the tips as bright orange flames erupt with each rotation and a piercing mechanical whine peaks over the fusillade. Spent casings arc through the air and scatter across the vehicle’s hood, bouncing slightly from the residual vibration as the man’s gloved hands adjust their grip. The relentless gunfire continues unabated, gradually tapering into a fading echo of mechanical discharge and strained breaths, leaving only the ambient city hum and the persistent roar of the blaze below.","video_1_relative_path":"videos/68355c62e15a8db7.mp4","video_2_relative_path":"videos/6a95f98b89ae884c.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/movie/movie_5/example.json::00000095","text_prompt":"In a post-conflict urban wasteland bathed in bright, clear daylight, a high-angle wide shot framed through a 35mm lens captures a two-lane asphalt road running horizontally across the frame. Three tan military vehicles—two armored cars followed by an open-top utility truck—travel in single file from right to left, their steady, unhurried progress kicking up faint dust trails. The surrounding terrain is scarred by extensive destruction, with piles of rubble, shattered concrete, and scattered debris dominating the grassy verges and vacant lots. In the distance, a dense cluster of mid-rise buildings stretches across the horizon, many damaged or unfinished, their exposed brickwork and hollow window frames speaking to long-term abandonment. Sparse vegetation clings to the dirt among the ruins, while silent streetlights line the roadway at regular intervals. As the convoy advances, the camera slowly pans upward and slightly zooms out, widening the frame to emphasize the vast scale of the devastated cityscape. No human figures are visible anywhere in the scene.\n\nThe soundscape mirrors the visual isolation, dominated from start to finish by a deep, low-frequency mechanical rumble. This continuous, moderately loud drone of heavy diesel engines moving over pavement is centered in the stereo field, conveying proximity without overwhelming the open, dry acoustic space of the outdoor environment. There is no music, dialogue, wind, wildlife, or distant traffic—only the relentless, grounding thrum of machinery, which maintains its intensity until the scene cuts abruptly to black. The combination of the static composition, gradual camera reveal, and unbroken mechanical sound establishes a mood of tense anticipation and stark aftermath, functioning as atmospheric exposition that underscores the impersonal power of the vehicles moving through the ruins.","video_1_relative_path":"videos/ab517553facfc83f.mp4","video_2_relative_path":"videos/2d93c0c5c58685b5.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/movie/movie_5/example.json::00000096","text_prompt":"In a sci-fi clinical thriller captured with a cinematic wide shot that hard cuts to a tight medium close-up, cool blue-gray lighting and a sterile, high-tech palette define a futuristic medical bay. The space is dominated by sleek metallic surfaces, softly glowing control panels, and a towering circular diagnostic scanner pulsing with a faint blue rhythm. A male patient in light gray scrubs sits rigidly on the edge of a raised, translucent examination table, his short brown hair and tense expression betraying quiet apprehension as he glances toward the machine. To his right, a female physician in a white lab coat stands with her back partially turned, her curly shoulder-length hair and layered dark necklace visible as she studies a wall-mounted console streaming abstract data and graphical readouts. A persistent low-frequency mechanical hum fills the space, underscored by sporadic electronic chirps and the soft whir of active cooling systems, establishing a sterile, isolated atmosphere heavy with unspoken tension.\n\nA hard cut abruptly shifts the perspective over the doctor’s shoulder, bringing her face into sharp focus against a softly blurred background where indistinct figures continue their work. Her neutral concentration fractures into startled realization; her eyes widen, eyebrows lift, and her lips part slightly as she turns her full attention to the patient. The ambient hum remains steady, grounding the moment before a calm, authoritative female Mandarin voice delivers a measured warning, stating, \"The environment here is extremely harsh; you have not undergone any training.\" Her tone is firm yet controlled, conveying professional caution without raising her volume, while her lips move in exact sync with the audio. The camera holds steady on her reaction as the mechanical soundscape persists, leaving the high-tech chamber suspended in a tense, foreboding quiet.","video_1_relative_path":"videos/a994c7966f8e55db.mp4","video_2_relative_path":"videos/6b790aad10623b47.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/movie/movie_6/example.json::00000027","text_prompt":"Set in a sci-fi military thriller, the scene opens with a low-angle wide shot capturing a dimly lit industrial hangar at night, where wet, reflective ground mirrors sparse overhead lighting. Three soldiers clad in light-colored, full-body protective suits walk away from the camera toward the center, their movements deliberate against the gloom. The central figure carries a large, bulky weapon with glowing orange tips slung over his shoulder, while to the right, a massive military tank sits idle, its hull marked with yellow-and-black hazard stripes and exposed mechanical details. A deep, ominous orchestral score immediately takes hold, driven by low brass and timpani to establish a tense atmosphere, layered beneath by a constant, low-frequency hum that mimics heavy machinery and ventilation systems.\n\nThe perspective shifts to a static wide frame showcasing a colossal, multi-level military transport ship docked within the cavernous space. Dark metal plating dominates the upper half of the view, bearing a weathered American flag along its side, while below the main deck, parked tanks and tiny silhouettes of soldiers emphasize the vessel’s staggering scale. The camera slowly tilts upward, tracing intricate mechanical gears and structural supports near the ship’s bow. The ambient drone continues, now joined by faint, echoing metallic clanks that reverberate through the vast interior. As the orchestral arrangement swells with high strings, the tension builds, heightening the sense of anticipation while leaving the environmental sounds to anchor the scene.","video_1_relative_path":"videos/e3b3d4a0e3a4600f.mp4","video_2_relative_path":"videos/49ed2b5e8d38e5e2.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_1/example.json::00000062","text_prompt":"A cinematic hospital drama unfolds in a static medium-wide shot, rendered in cool, even fluorescent lighting with a muted clinical palette of pale greens, soft blues, and neutral beiges. An older bald patient lies propped in bed, wrapped in a blue textured blanket over a pale green patterned gown, a red wristband visible on his right wrist. Beside him, a younger dark-haired man in a striped long-sleeved shirt leans forward, gently wiping away tears from the patient’s face while resting a reassuring hand on his shoulder. At the foot of the bed, a blonde woman in a beige cardigan over a white lace-trimmed top watches with a warm, hopeful smile. The quiet room is filled only with the faint, steady electronic hum of medical equipment. As the younger man withdraws his hands, the patient’s quiet weeping gives way to a soft, relieved smile, and a slightly raspy male voice murmurs, “So good to see you,” carrying a tone of profound gratitude and emotional release.\n\nThe blonde visitor steps closer, her expression softening with concern as she gently places her right hand on the patient’s left forearm. In a tender, measured female voice, she asks, “How do you feel?” The patient nods faintly, his eyes moist but calm, while the younger man straightens to his full height beside the bed, offering quiet, steadfast support. The camera remains completely motionless throughout, holding the balanced composition of the three figures against the quiet clinical setting, allowing the subtle interplay of facial expressions and comforting gestures to carry the emotional weight. The scene lingers on this moment of reconciliation and hopeful recovery, underscored only by the persistent low hum of the hospital environment.","video_1_relative_path":"videos/9ccb49d398758db4.mp4","video_2_relative_path":"videos/b8f81ca5b47c4491.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_1/example.json::00000073","text_prompt":"A cinematic medium close-up framed through an open side window of a small aircraft cockpit during a daytime flight, bathed in warm amber sunlight that spills across the dim interior, casting soft shadows and highlighting the olive-green flight jackets of two young aviators. The camera holds steady as a young woman with long dark hair tied in high pigtails leans against her co-pilot’s shoulder, her black fingerless gloves resting near her face while she gazes out at the pale, cloud-streaked sky. A steady, low-frequency engine rumble fills the cabin as she turns slightly toward him, a clear, lightly excited female Mandarin voice stating \"幸亏有你。\" Without breaking eye contact, a playful smile spreads across her face as she adds in a tone of pure admiration, \"太帅了。\"\n\nThe man keeps his hands firmly on the control yoke, his eyes fixed ahead until a brief pause draws his attention. He glances sideways at her with a mildly exasperated half-smile, a casual yet self-assured male Mandarin voice cutting through the cabin air: \"喂，我才是功臣。\" The woman’s amused smile lingers in the warm cabin light, the continuous drone of the aircraft engine underscoring their easy camaraderie as the scene holds on their shared gaze and the quiet confidence of their flight.","video_1_relative_path":"videos/10e5e3399cb8dcd1.mp4","video_2_relative_path":"videos/0096d783a5e6daca.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_10/example.json::00000009","text_prompt":"Cinematic realism, 16:9 widescreen, natural daylight, and a shallow depth of field frame a static medium-close shot of a bright red convertible gliding slowly down a sun-drenched suburban street, the camera locked directly ahead through the windshield as reflections of passing trees and vehicles glide across the glass. Inside, a young man with short dark hair and a dark-gray T-shirt bearing a small orange-yellow crescent and star graphic sits in the passenger seat, his expression neutral and slightly tense as he stares forward. Beside him, the driver—a young woman with straight chin-length blonde hair, blunt bangs, and a vivid pink top—rests her hands on the black steering wheel and turns her head toward him. A faint, steady low-frequency hum of the idling engine underscores the quiet cabin as she speaks in a clear, mildly curious tone, “How come you didn’t go into work today?”\n\nHe maintains his forward gaze, lips pressed together in a moment of quiet hesitation before answering without turning his head, his voice measured and tinged with restrained indignation, “I’m taking a sabbatical because I won’t kowtow.” Each word is deliberately enunciated, cutting through the ambient engine hum and the soft, out-of-focus backdrop of distant traffic and leafy roadside foliage. As he finishes, the woman’s face softens into a faint, knowing smile, her curiosity giving way to quiet amusement and familiarity. The camera remains completely still, keeping the occupants sharply in focus while the blurred suburban scenery drifts past, preserving the intimate, dialogue-driven tension of the moment as the car continues its slow, steady advance.","video_1_relative_path":"videos/310b4250f83d6d4c.mp4","video_2_relative_path":"videos/2986c46fa3962c7a.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_2/example.json::00000064","text_prompt":"A contemplative urban vignette captured in a medium, eye-level tracking shot that glides smoothly backward at a steady walking pace. Natural daylight diffuses evenly across the frame, casting a slightly cool, green-dominant palette punctuated by a tan bamboo fence on the left and the muted grays of pavement and distant buildings in soft focus. An adult woman in a purple-and-blue patterned blouse beneath a gray knit vest walks side by side with a young girl wearing a blue baseball cap with a red emblem and a layered graphic tee. The woman holds a small paper cup and a brown paper bag marked with casual dark lettering reading (adult) SODA, while the girl focuses on stirring her own cup with a wooden stick. As they move along the leafy sidewalk, the camera maintains a gentle retreat, keeping both subjects centered while background details like a distant sanitation worker near a blue utility vehicle fade into the periphery.\n\nBeneath a continuous, low urban traffic hum, a calm, neutral female Mandarin voice begins, stating \"原来的好看，但是它也有一种美。\" (It might not be as beautiful as before, but it still holds a certain beauty.) Her free hand rises with an open palm gesture, underscoring her thought as she glances toward the attentive girl. Her reflective tone continues as she adds, \"这种美好像在提醒我们，文明也许不是一直在前进。\" (This kind of beauty seems to remind us that civilization doesn't always move forward in a straight line.) As the woman lowers her hand and resumes a relaxed posture, her voice trails off mid-thought, completing the fragment as \"太匆忙了。\" (too rushed.) The scene closes on their unhurried pace, the ambient city murmur persisting as the philosophical reflection lingers in the cool, natural light.","video_1_relative_path":"videos/f55a358586445472.mp4","video_2_relative_path":"videos/7fd6276093287286.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_2/example.json::00000077","text_prompt":"A contemporary romantic-comedy scene opens with a medium rear tracking shot, bathed in warm late-afternoon sunlight that casts soft shadows across beige stone buildings and a tall black wrought-iron fence bordering a courtyard with a domed classical building. The camera glides backward, maintaining a steady distance as a casually dressed couple advances toward the lens. The man, with short brown hair and a dark gray blazer over a crisp white shirt, turns his head slightly toward his companion. She has blonde hair loosely tied back, wears a cream textured jacket over a black top, and carries a brown shoulder bag that sways gently with each step. As they walk, a calm, conversational male voice begins, stating, \"He was the one who had warned me about French chicks.\" His lips move in precise sync with the audio, his expression neutral yet engaged. The soundscape is naturally captured outdoors, layered with the steady rhythm of their footsteps on pavement, a low urban rumble, faint pedestrian chatter, and a light wind brushing past the microphone.\n\nA clean cut shifts to a frontal medium shot as the pair face forward, continuing their leisurely pace beneath the golden hour glow. The background reveals leafy green trees, a parked blue sedan, and a red circular traffic sign mounted on a pole. The woman turns fully toward him, eyebrows slightly raised and lips parted in playful curiosity, and asks, \"What did he tell you about French women?\" Her clear, mid-range voice carries a lighthearted intonation that matches the relaxed atmosphere. The man smiles broadly, his eyes crinkling as he glances down for a moment before meeting her gaze. Responding with animated hand gestures, he first raises his right palm outward dismissively, then opens both hands wide for emphasis while delivering his reply: \"Nothing. The guy—he’s never met any French women, okay? He’s never been east of the Mississippi.\" His delivery is quick and lightly amused, punctuated by a subtle stammer and a soft inhalation just before the final clause. Behind them, pedestrians drift through the periphery, one man in a dark suit walking away while another crosses a distant intersection. The scene maintains its grounded, romantic-comedy tone, ending mid-stride with the couple still moving forward, symmetrically framed against the historic Parisian backdrop, their natural dialogue and ambient city textures weaving together into a seamless, intimate moment.","video_1_relative_path":"videos/83588fb57cef5773.mp4","video_2_relative_path":"videos/f834d4187bfdec64.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_4/example.json::00000000","text_prompt":"A modern domestic comedy sketch unfolds in a static medium-wide 16:9 frame, captured on a locked-off camera with high-key, diffuse lighting that eliminates harsh shadows and bathes the scene in a clean, sitcom-like brightness. The color palette contrasts vivid reds, cool blues, and warm browns: a man in a red short-sleeved T-shirt and dark jeans lounges on an off-white sofa to the right, clutching a leaf-patterned cushion while extending his left arm to point accusingly at two women standing near sheer white curtains and heavy brown drapes. Beside them, a potted plant with purple blossoms adds organic texture. The woman closest to the camera wears a white oversized graphic tee and a patched light-wash denim skirt, planting her hands on her hips as she glares defiantly. Slightly behind her, a second woman in a light-blue cold-shoulder ruffled blouse and frayed white shorts watches with folded arms and a concerned expression.\n\nA faint, steady indoor room tone underlies the tense exchange as a sharp, irritated young male Mandarin voice rings out, his index finger still jabbing forward: \"I know it stings to realize you threw your money away.\" His facial muscles tense, eyebrows knitting as he emphasizes each syllable. The woman in the white tee shifts her weight but holds her ground, snapping back with a quick, emphatic female Mandarin voice: \"But you shouldn't be talking nonsense like that.\" The man’s pointing hand drops momentarily before rising again, startled by her forceful delivery. The woman in the blue blouse steps half a pace forward, uncrossing her arms to interject with a firm, supportive female Mandarin voice: \"Exactly.\" Her decisive tone locks eyes with the man, whose expression shifts to widened surprise and parted lips. A brief, off-screen burst of audience laughter erupts, peaking and fading within a second, confirming the staged, comedic nature of the recording. The scene concludes on the lingering, frozen tableau of the three characters mid-confrontation, bathed in even, shadowless light.","video_1_relative_path":"videos/74951fb3d67c7230.mp4","video_2_relative_path":"videos/39485e23644eab28.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_4/example.json::00000060","text_prompt":"A realistic domestic drama unfolds in a modest modern apartment living room at night, captured in a 16:9 frame with warm tungsten practical lighting and soft ambient fill that yields gentle contrast and soft facial modeling. The opening medium, eye-level shot isolates a young woman in a black double-breasted coat sitting stiffly on the left end of a grey fabric sofa, her hands clasped and gaze lowered in quiet sorrow. Beside her, a man in a dark suit reclines with his right arm draped over the backrest, leaning forward as he begins to speak. Behind them, an ancestral memorial altar holds a framed portrait of an elderly woman flanked by white flowers and a flickering candle, anchoring the room in grief, while a refrigerator dotted with magnets and a glass-front dining cabinet sit softly blurred in the background. A low, steady room tone underlies the soundtrack as the man’s voice rises in sharp indignation, a forceful male Mandarin tone stating, \"I went too far,\" before he accuses with renewed emphasis, \"She smashed Mother's urn.\" The woman’s eyes lift briefly toward him before returning to her lap, her expression pained yet controlled, while the camera remains static, holding the three-quarter profile of the man and the side view of the woman.\n\nA straight cut widens the frame into a full-room composition, revealing a third figure: a man in a charcoal suit sitting upright in a tan leather armchair opposite the sofa, his hands folded calmly on his knees. A low coffee table between them bears a pale tissue box, and beyond the group, a large window frames the cool glow of city lights outside. The armchair man responds in a deeper, measured male Mandarin tone, his voice cutting through the tension as he says, \"Yes, but it was just an accident,\" gesturing subtly with one hand while his brow furrows in explanation. The woman turns her head toward him, listening intently, while the reclining man watches the exchange in silence, his jaw tight. As the armchair man concludes with a reproachful cadence, \"You treated Mingyu like that back then,\" his final words trail off into the quiet room. The characters freeze in a tense, unresolved stillness, the absence of music and extraneous noise amplifying the intimate weight of their conflict as the scene holds on their silent standoff before fading to black.","video_1_relative_path":"videos/4fdf18108073c270.mp4","video_2_relative_path":"videos/da94dd5d50b71187.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_5/example.json::00000036","text_prompt":"A static medium-wide shot captures a warmly lit, traditional Chinese tea house, bathed in diffused overhead light that casts soft shadows and accentuates the rich textures of dark wood, earthy browns, muted greens, and beige accents. Symmetrically framed across a long table, a man in a brown turtleneck sweater sits on the left while a woman with long dark hair, dressed in a black blazer and blue jeans, leans forward on the right with her chin resting in her hand. The scene opens with a faint ambient hum and the soft rustle of fabric as the man raises his right palm toward an off-screen server and calls out cheerfully in Standard Mandarin, stating “来，老板，买单了。” The woman lowers her hand, straightens her posture, and answers in a calm but decisive Standard Mandarin tone, saying “你甭管了，我来吧,” offering a small nod and a faint smile that conveys measured confidence.\n\nMaintaining steady eye contact, the woman tilts her head slightly, eyebrows lifting in a teasing manner as she adds in a confident, playfully proud Standard Mandarin voice, noting “我可以打折。” The man’s eyes widen and his mouth parts in pleasant surprise, accompanied by the faint creak of his chair as he shifts his weight back. Reacting immediately, he exclaims in a surprised Standard Mandarin pitch that quickly settles into amused agreement, declaring “真的？也对，该你请,” lifting both hands in a half-shrug before letting them fall. The camera holds on their relaxed postures amid the softly glowing pendant lights, wooden lattice screens, potted plants, and a framed landscape scroll in the background, while the clean dialogue and subtle environmental sounds sustain a light, humorous dynamic that emphasizes their familiar rapport without any musical accompaniment.","video_1_relative_path":"videos/c1a03ed37d4fc140.mp4","video_2_relative_path":"videos/d33886f3472727e3.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_6/example.json::00000055","text_prompt":"A warm, cinematic medium two-shot captures a spontaneous comedic exchange in an upscale restaurant defined by dark-wood beams, wall sconces, and a softly glowing candle in a square glass holder at the center of a white-clothed table set with silverware and three empty wine glasses. The background gently falls into shadow, revealing shelves of wine bottles and dimly lit patrons that reinforce the fine-dining atmosphere without distracting from the foreground. A dark-haired man in a black suit jacket over an open-neck white shirt, with a lavalier microphone clipped near his collar, speaks with lively, conversational enthusiasm, stating, \"People that have style with food that has style.\" He continues without pause, adding, \"You know, so much of the time, you really have to match the presentation to the flavor,\" punctuating his words with animated gestures. Conan O’Brien, tall with reddish-blond hair and wearing a casual dark jacket over a charcoal T-shirt, gently interrupts, raising his right hand in a polite \"wait\" gesture and replying, \"I hear you,\" their voices overlapping in a natural, friendly rhythm. Conan reaches down, lifts a neatly folded white cloth napkin from his lap, and theatrically tucks it under his chin like a bib, adjusting it with both hands. With playful enthusiasm, he declares, \"Let’s get the grub on, huh?\" An off-camera audience responds with light, collective laughter that rises above the low restaurant murmur. Still holding the napkin in place, Conan leans back slightly, smiles broadly, and emits a brief, gleeful exclamation, \"Eh!\" The other man watches him with a mild smile, hands now resting calmly in his lap. The camera holds steady on the two-shot, preserving the cozy ambiance and convivial atmosphere as the warm dining room lights linger over the scene.","video_1_relative_path":"videos/224719edb94bd8ff.mp4","video_2_relative_path":"videos/e690c6ce14ed76f1.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_7/example.json::00000060","text_prompt":"Cinematic domestic drama, captured in a single locked-off medium two-shot with a 50mm lens, bathed in warm, intimate living-room lighting. Blue curtains frame a window behind a beige sofa where a floor lamp casts a soft glow at screen right. A young woman with long, wavy brown hair, wearing a maroon T-shirt and lace-trimmed cardigan, sits beside a young man in a dark pin-striped jacket over a patterned shirt. She leans toward him, holding a folded white paper, and gestures with it as a firm, slightly exasperated female Mandarin voice begins, stating “这样，一三五归你，我绝不打扰。” Her lips match the dialogue precisely against a backdrop of clear indoor room tone, with no music or ambient distractions.\n\nWithout breaking the static frame, the woman abruptly stands, still clutching the paper, and quickly exits left, leaving a brief visual gap as a faint rustle of fabric echoes. The man remains seated, watching her departure with a neutral expression. She re-enters from the left and sits back down beside him. He immediately turns his head, gesturing lightly with his right hand, as a calm, mildly complaining male Mandarin voice responds, saying “我还没说完呢，让我出去约会也可以，不过这年头带个女孩出去太贵了。” The woman listens intently, her gaze fixed on him in a composed posture, as the quiet room tone and subtle cloth movements sustain the conversational, slightly tense atmosphere until the scene holds.","video_1_relative_path":"videos/e9cf67c91a6e91ac.mp4","video_2_relative_path":"videos/a1f7248235e5bc8f.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_7/example.json::00000086","text_prompt":"Cinematic domestic drama, shot on a 50mm lens with soft natural daylight streaming through white horizontal blinds, casting gentle shadows and establishing a muted, cool ambience. A medium close-up frames a middle-aged East Asian man seated at a wooden dining table, wearing a dark brown rib-knit cardigan over a light blue denim-style shirt with a crisp white inner collar. His brow is furrowed and his gaze is fixed on someone just out of frame to his left. A forceful, urgent male Mandarin voice declares, “这事啊，我爸必须要来美国，我必须要养，除非你不认我爸。” The audio is completely dry, stripping away all ambient noise or music to heighten the raw tension of his clipped, insistent delivery. \n\nA hard cut immediately shifts to an over-the-shoulder reverse shot from behind his right shoulder, revealing a young East Asian woman seated across the table. Her dark hair is loosely pulled back, and she wears a thick pale blue turtleneck sweater that complements the scene’s muted earth-tone palette. Her eyes widen and her mouth parts in visible shock as his words land, the soft even lighting catching the wall-mounted photo collage and window blinds behind her. A calm but firm female Mandarin voice responds, “我没有不认你爸，我只是希望你能够量力而行.” She leans forward with her hands clasped on the tabletop, her expression shifting from surprise to earnest pleading as her eyebrows knit together. The man remains silent, listening intently with rigid posture and an unwavering gaze, while the camera holds static on the unresolved exchange, leaving the intimate domestic space heavy with unspoken weight.","video_1_relative_path":"videos/1bbefbacacfd5a60.mp4","video_2_relative_path":"videos/8d5577c162465083.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_8/example.json::00000020","text_prompt":"Cinematic drama, narrow Parisian street at dusk, warm ambient lighting from shop windows and streetlamps, static medium two-shot, intimate framing. The camera holds steady on a man in his early thirties, wearing a dark gray suit jacket over a white shirt, and a woman in her mid-twenties with blonde hair in a loose ponytail, dressed in a cream knit cardigan over a black top. They stand close together, facing one another before a furniture store window that displays a golden cherub statue and elegant French lettering, while a green street sign and a red-and-white traffic marker hang above them. The composition remains completely still, anchoring the scene in quiet stillness and emotional tension.\n\nA calm, reflective male voice begins, stating, “that there are a lot of serious problems in the world,” as he gestures earnestly with his right hand, palm open and fingers relaxed. The woman listens intently, her eyes fixed on him, offering a brief, polite smile before settling into a neutral, attentive posture. A soft, slightly weary female voice responds, “Okay, thank you.” The man continues, his voice lowering as he hesitates, searching for the right words before raising his left hand slightly and murmuring, “Okay. I mean, I don’t even have one published.” The audio is stripped down to their clear, close-miked dialogue, with only a barely perceptible layer of distant city hum and minimal outdoor reverb, leaving the narrative tension unresolved and the focus entirely on their vulnerable exchange.","video_1_relative_path":"videos/ee6d40ec67901933.mp4","video_2_relative_path":"videos/eead430f0b51d185.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_8/example.json::00000052","text_prompt":"Cinematic historical drama, shot with a 35mm lens and soft, diffused frontal illumination that eliminates harsh shadows while accentuating the textures of silk and polished wood. The scene opens in a symmetrically framed, static medium-wide shot within a dimly lit, high-ceilinged hall dominated by a palette of muted purples, blacks, creams, and dark woods. Centered in the composition, an elderly man sits upon an ornate, dark wooden throne-like chair whose back rises to his shoulders, his hands resting calmly on the armrests as he wears a lustrous, deep-purple robe embroidered with subtle gold patterns. Directly behind him stands a younger attendant in a black, intricately patterned robe, maintaining a respectful posture with his eyes lowered. To the elder’s left, an older court official dressed in layered pale cream robes over a darker inner garment and topped with a tall black hat steps slowly from the background, gripping the hem of his sleeve. A faint, steady mechanical hum underlies the atmosphere, hinting at unseen machinery or ventilation. The official halts beside the throne, bows slightly, and a calm, mid-low male Mandarin voice begins, stating \"是他自己琢磨的。\" The seated elder listens impassively, his face composed, before offering a short, thoughtful \"嗯。\" accompanied by an almost imperceptible nod, while the attendant remains perfectly still.\n\nAfter a brief pause, the camera very gradually eases backward in a slow, imperceptible dolly-out, widening the composition to reveal more of the carved lattice wall and flanking doors without disrupting the symmetrical framing. The elder resumes speaking and a deeper, resonant male Mandarin voice continues, stating \"论他的年纪，这般年轻能有这心思也不错。\" The official straightens while maintaining deference, and the attendant shifts minutely but never raises his gaze. All three figures hold their positions as the low mechanical drone persists beneath the dialogue, the soft lighting casting gentle shadows that preserve the solemn mood until the scene naturally fades to black.","video_1_relative_path":"videos/58a3fb63585c7a48.mp4","video_2_relative_path":"videos/b439dfd01fbe6e1c.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_9/example.json::00000045","text_prompt":"Cinematic medium two-shot, static eye-level framing, shallow depth of field, warm amber key lighting, and a saturated red-and-gold color palette establish an intimate lounge or bar setting. A wall sconce casts soft highlights across a round wooden table holding a neat stack of black poker chips, while out-of-focus liquor bottles rest in the right foreground and a glass doorway framed by red velvet curtains reveals blurred fairy lights in the background. Two young men face each other across the frame. The man on the left, dressed in a blue blazer over a yellow-and-blue plaid shirt and light trousers, speaks first with a calm, earnest tone. A calm, earnest male Mandarin voice begins, stating \"I didn't spot the flaw in the contract, that's my problem.\" As he speaks, he lifts his right hand palm-up to underscore his accountability. His counterpart on the right, slightly taller with black-rimmed glasses and an open red-blue-white plaid shirt over a white tee, listens in silence, posture upright but relaxed, his eyes fixed steadily on the speaker.\n\nThe camera holds its position without movement or cuts, maintaining the subdued, high-stakes atmosphere as the speaker lowers his hand and continues with measured resolve, stating \"I signed the contract with my own hands.\" The listener maintains unwavering eye contact, lips pressed together, offering only a barely perceptible dip of his chin in acknowledgment. The speaker concludes with firm finality, delivering a slight nod as he states \"I admit this point.\" The scene lingers on this quiet tension, the warm bar setting and shallow focus keeping all narrative weight on the raw, unspoken gravity of the exchange before fading out.","video_1_relative_path":"videos/cb1f92a9ef826f38.mp4","video_2_relative_path":"videos/249036590ba9ecb6.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/music/music_2/example.json::00000041","text_prompt":"Cinematic medium close-up, shallow depth of field, warm directional lighting, and a muted domestic palette frame a young woman seated in a softly lit bedroom, her long straight hair fading from dark brown at the roots to blonde at the ends. She wears a black top with sheer, vertically pleated sleeves and a delicate silver necklace, her eyes closed in quiet concentration as she performs. A dark wood acoustic guitar with white binding rests against her, a black capo clamped on the second fret while her left hand shifts smoothly across the fretboard and her right hand fingerpicks near the soundhole. The blurred background reveals a white tufted headboard, crisp pillows, and a blue-and-black abstract painting on the wall, while a subtle vignette draws the eye to her centered, intimate presence.\n\nThe audio unfolds as a solo steel-string acoustic performance, recorded clean and close with minimal reverb, capturing the natural short-decay warmth of a small room. A gentle, breathy female voice begins mid-thought, singing \"It felt like the party time,\" her soft timbre and clear enunciation matching the steady seventy-two beats per minute fingerstyle progression. As her left hand glides along the strings, producing faint, organic squeaks and the subtle thump of her body against the guitar, the instrumental interlude maintains a consistent mezzo-piano dynamic. The vocal returns for a final, emotionally resonant phrase, delivered with restrained wistfulness: \"And yet, the quiet remained.\" The take holds its stillness without cuts or camera movement, ending abruptly on a lingering guitar sustain that leaves the raw, reflective intimacy of the moment fully intact.","video_1_relative_path":"videos/e455ed7fe5fe4725.mp4","video_2_relative_path":"videos/6447f290a17eac4e.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/music/music_2/example.json::00000097","text_prompt":"Cinematic, intimate musical performance captured in soft, diffused natural light under a pale overcast sky, with a muted teal and earthy color palette. The camera frames a man from the chest up against a serene backdrop of a vast lake and hazy, layered mountains. He wears a faded teal t-shirt with a small orange graphic on the left chest, his shoulder-length brown hair tucked beneath a backwards dark baseball cap, a trimmed beard and mustache framing his face. A black microphone on a stand sits directly before him as he cradles a light-colored acoustic guitar with a black pickguard and a circular mountain sticker reading BANFF NATIONAL PARK near the soundhole. To the right edge, the arm and torso of a second guitarist in a white long-sleeve shirt are partially visible. The camera begins a slow, smooth push-in, gradually tightening the frame from a medium shot to an intimate close-up on the singer’s face and the guitar neck.\n\nA gentle, breathy tenor voice begins, accompanied by warm, fingerpicked acoustic guitar chords that carry a subtle, reverberant sheen. He sings, \"Are you thinking of me?\" with a soft, emotive delivery, his eyes closing tightly as he sustains the final vowel into a quiet hum. His head tilts downward in concentration, and the shallow depth of field blurs the water and mountains into a soft, painterly wash. The audio remains cleanly isolated, stripping away any ambient wind or traffic to focus entirely on the steady, eighth-note pulse of the guitar and the singer’s controlled breathing. The scene holds a contemplative, gently melancholic mood, lingering on the unresolved question and the sustaining chords as the frame tightens and the moment fades into quiet resonance.","video_1_relative_path":"videos/22f9756d422f3671.mp4","video_2_relative_path":"videos/2576ebea5bb46acd.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/music/music_3/example.json::00000022","text_prompt":"The scene opens on a medium close-up of a male keyboardist seated at his instrument, his upper torso and face framed against a dark stage washed in saturated purple light. A static but subtly handheld camera lends a gentle, organic sway that tracks his natural movements. His short dark hair and trimmed beard catch the magenta glow as he looks down at the keys, eyes focused and lips parted in concentration. A black in-ear monitor rests in his right ear with a thin cable trailing out of frame, and he wears a plain black T-shirt while a boom microphone hovers nearby, unused. Over this intimate visual, a slow-tempo pop-rock ballad unfolds: clean electric guitar arpeggios ring out over a soft synth pad, anchored by a steady kick-snare pattern and a rounded bass line. The mix is spacious and heavily reverbed, evoking the acoustic footprint of a large venue or professional studio, with moderate dynamics and no extraneous crowd noise.\n\nA sharp cut shifts to a side-profile close-up of the lead vocalist standing center stage. He sports a shaved head, small round sunglasses with silver frames, and a white V-neck T-shirt, accessorized with a black studded leather wristband, a simple chain necklace, and a black circular earring. A colorful flame-style tattoo wraps around his left forearm, partially visible beneath his sleeve. He grips a black vocal microphone topped with a yellow windscreen, delivering an emotionally charged performance with a clear, mid-range tenor voice that cuts cleanly through the instrumentation. His jaw moves rhythmically with the melody, his expression earnest and eyes slightly narrowed behind the lenses. Behind him, vertical columns of glowing pink-purple lights pulse softly, adding depth to the dark backdrop, while a blurred silhouette of another band member lingers to the far right. The camera remains fixed on the singer, capturing subtle head tilts and hand adjustments on the mic stand as the track continues seamlessly, before the footage and audio cut off abruptly mid-phrase.","video_1_relative_path":"videos/4428be35dde7ad7a.mp4","video_2_relative_path":"videos/7ee7d6dbed901833.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/physics/physics_2/example.json::00000021","text_prompt":"A documentary-style, daytime sequence opens with a fixed, dashboard-level perspective from inside a moving commercial truck, bathed in bright natural sunlight that illuminates a two-lane rural road. Trees line the left shoulder while open fields and scattered houses stretch to the right, utility poles receding into the hazy distance. A red semi-truck maintains a steady pace ahead in the same lane. The dark dashboard anchors the foreground, its windshield wipers resting at the bottom edge, while a side-view mirror catches the glint of a yellow-orange object. Beneath this steady forward motion, a low, continuous engine rumble blends with the subtle high-frequency hiss of tires on pavement, establishing a quiet, enclosed cabin atmosphere.\n\nThe camera then executes a deliberate pan to the left and downward, shifting focus from the road into the utilitarian cabin. A small black oscillating fan mounted on the dash comes into view, followed by a white control panel studded with circular gauges and switches. A human hand briefly brushes the top-left corner near the fan before the frame settles on the lower passenger-side footwell. There, a red plastic trash bin with a white liner sits beside a red fire extinguisher topped with a green nozzle, surrounded by scattered leaves and dirt on the floor mat. As the camera locks onto these objects, a sharp metallic clank echoes through the cab, immediately followed by a brief scraping sound, implying an unseen hand adjusting equipment nearby. The engine hum persists underneath, gradually softening as the shot holds static on the interior details, closing the scene on a mundane, observational note.","video_1_relative_path":"videos/949df9b8911b046d.mp4","video_2_relative_path":"videos/b951d86846e8534b.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/physics/physics_3/example.json::00000065","text_prompt":"A static, full-frame cinematic composition opens on a soft radial gradient, where an overexposed white center bleeds into a pale, muted green vignette, establishing a dreamlike, sun-drenched palette. The frame remains completely motionless until the word \"Paradise\" begins to fade in at the exact center. Rendered in a stylized serif typeface, the letters initially appear as translucent gray before quickly sharpening into a solid, dark olive-green hue. As the typography solidifies, delicate line-drawing floral motifs—simple flowers and leaves—fade in around the letters 'a', 'd', 'i', and 's', anchoring the minimalist design in organic elegance. The entire visual settles into a still, serene title card that radiates natural tranquility.\n\nConcurrently, the audio track unfolds as a high-fidelity ambient tropical soundscape, beginning immediately with a slow, legato synthesized flute melody soaring in a higher register. A sustained, airy synthesizer pad provides warm harmonic support, while a low-frequency bass note grounds the arrangement. As the floral graphics emerge, a rhythmic shaker or maraca enters at a steady, moderate tempo, perfectly synchronizing with the visual transition to establish the main musical phrase. The instrumentation maintains a consistent volume and texture throughout, with no room tone or environmental noise, creating a clean, studio-polished meditative atmosphere. The seamless marriage of the gentle flute lead, organic percussion, and the serene olive-and-white palette establishes an inviting, tranquil tone, functioning as a calm and elegant introduction to the \"Paradise\" theme.","video_1_relative_path":"videos/b7284187749dc18c.mp4","video_2_relative_path":"videos/d8cbc7fdd515f277.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/physics/physics_5/example.json::00000043","text_prompt":"Cinematic documentary-style sequence, locked medium-wide static shot, evenly lit industrial testing bay with overhead fluorescent lighting. The scene frames a large, vertically mounted vehicle windshield on a stand at center-left, its surface already extensively spider-webbed with fractures radiating outward. A man dressed entirely in black—long-sleeved top, pants, gloves, and clear safety glasses—stands to the right of the pane, gripping a heavy, dark hammer-like tool. He begins a methodical, rhythmic assault, swinging the implement downward onto the windshield’s lower-right quadrant with forceful, measured strikes. Each impact delivers a sharp, high-frequency metallic clack or snap, immediately followed by a duller, resonant thud as mass transfers into the glass. Tiny shards scatter and fresh cracks rapidly propagate with every blow, while the pane visibly flexes and vibrates under the strain. Behind him, a white box truck is parked diagonally with its driver-side door open, and further back to the left, a second individual in a blue shirt sits motionless on a flatbed trailer, observing the procedure without intervening. The environment is grounded by gray concrete flooring, a wire mesh cage packed with fibrous insulation, and a wheeled cart bearing faint red indicator lights. The audio landscape is stripped to its mechanical essentials, with no dialogue, music, or ambient chatter breaking the tension. Only the percussive impacts dominate, layered with subtle glass fracture textures that shift from fine tinkling in the early strikes to louder, cascading cracks as the damage accumulates. A low-level broadband room hum and a short, hard-surface reverb complete the clinical, forensic atmosphere, directing full attention to the progressive fragmentation of the windshield and the raw physics of the destructive test.","video_1_relative_path":"videos/0322caa5ac684dc5.mp4","video_2_relative_path":"videos/609698a421211149.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/physics/physics_7/example.json::00000053","text_prompt":"Cinematic, minimalist nocturnal scene captured in a single, unbroken static shot with a fixed camera perspective. Against a nearly black backdrop, heavy rainfall cascades in dense, vertical streams, rendering fine white streaks that catch the ambient light with occasional brighter highlights. The lower third of the frame reveals a wet asphalt surface, where scattered points of blue-white light reflect and ripple outward in an irregular band of sparkling glints with every drop’s impact. The composition remains austere and uncluttered, focusing entirely on the relentless descent of water and its interaction with the glistening ground, with no other objects, figures, or text present.\n\nThe soundscape is a pure, immersive wall of environmental rain noise that perfectly synchronizes with the visual intensity. A broad-spectrum roar fills the mix, anchored by a deep low-frequency rumble and layered with a constant mid-to-high frequency hiss and sizzle from countless droplet impacts on both air and pavement. The audio remains loud, enveloping, and unwavering throughout, completely devoid of wind, thunder, mechanical sounds, or any musical or vocal elements. This seamless audiovisual alignment crafts a meditative, hypnotic atmosphere that emphasizes the raw, solitary force of nature, delivering a clean, uninterrupted sensory experience ideal for immersion and focus.","video_1_relative_path":"videos/a8a2f369d2d105a4.mp4","video_2_relative_path":"videos/17a5ceffb537e55c.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/podcast/podcast_1/example.json::00000022","text_prompt":"A contemplative presentation scene, shot in a steady medium close-up that transitions to a static wide, opens on a bald, bearded man standing center stage against a dark maroon-purple backdrop. A single warm spotlight strikes from the front-left, carving soft shadows across his patterned blue shirt speckled with yellow and purple, while a discreet headset microphone rests near his left cheek. He drops his gaze for a moment before lifting his eyes to the unseen audience, lips moving with calm, deliberate cadence as subtle head nods and eyebrow lifts punctuate his measured delivery. The audio is pristine and isolated, carrying only his clear, neutral English voice with no music, crowd noise, or ambient room tone to distract. A calm, measured male voice continues, finishing the trailing thought with '…or the loud rubbing of surfaces.' The frame holds steady before a hard cut transitions to a wider perspective that reveals the full architectural context. He now stands smaller, centered on a circular red rug atop a polished black floor, flanked stage left by a large three-dimensional red logo and stage right by a towering LED screen displaying a deep blue underwater photograph of two humpback whales swimming side by side. Behind him, a geometric grid wall is accented by thin vertical white light strips and scattered orange dots, while rows of seated audience members fade into the foreground shadows. The lighting remains tightly focused on the speaker and stage elements, preserving the stark, minimalist atmosphere. He gestures with open palms at chest height for emphasis, his steady delivery unbroken as he states, 'I believe we can and should rehaul our approach to how we make machines,' leaving the auditorium in a hush of intellectual anticipation.","video_1_relative_path":"videos/f988b42727acf545.mp4","video_2_relative_path":"videos/96d8a773b150e913.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/voiceover/voiceover_10/example.json::00000076","text_prompt":"Night falls over a quiet urban corner, captured in a static medium shot that frames two middle-aged men seated on a dark-green metal bench running horizontally across the lower frame. Behind them, a matching green-tiled pillar and railing anchor the composition, while faint tree silhouettes fade into a deep blue-black backdrop. Warm artificial light from an unseen streetlamp at the upper left spills across the scene, casting soft shadows and highlighting their faces against a cool palette of desaturated greens and blues. The man on the left, dressed in a white suit with a loosened pink tie, slumps forward with his elbows on his knees and his right hand pressed to his forehead, his shoulders trembling as he draws a shaky breath. Beside him, the man in a beige trench coat over a pale shirt sits upright, his gaze fixed with quiet concern. He extends his right arm across the bench, resting a steady hand on his companion’s shoulder in a silent gesture of support. Beneath this stillness, a subdued electronic underscore begins—a low synth bass pulse layered with airy pads and a sparse, bell-like motif that establishes a somber, psychologically tense atmosphere. A calm male Mandarin voice-over begins, stating, \"Once addiction takes hold, it is incredibly difficult to break.\"\n\nThe distressed man lifts his head slightly, his eyes glistening and lips quivering before he bows it again, his voice cracking as he pleads, \"I truly wanted to accomplish something to make you proud.\" His tone is strained and wavering, carrying the weight of unmet expectations. The second man remains motionless, maintaining unwavering eye contact and a steady, comforting posture as the minor-key pads sustain the emotional tension. The lighting, framing, and restrained score hold firm, preserving the quiet intimacy of the moment as the scene naturally lingers in stillness, leaving only the lingering resonance of their unspoken bond and the quiet hum of the city night.","video_1_relative_path":"videos/ea106ce6efe01270.mp4","video_2_relative_path":"videos/052674e8da2b7339.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/voiceover/voiceover_11/example.json::00000021","text_prompt":"Set in a rustic historical martial arts drama, the scene opens with a high-angle, medium-long shot of a quiet woodland clearing, where a palette of earthy browns and muted greens dominates the frame. Brown earth is scattered with dry leaves and twigs, and thick, gnarled tree roots curve across the foreground. An elderly man with long, greying hair tied back sits hunched beside the roots, clad in a dark, patched tunic that speaks of wear and travel. His posture radiates fatigue and deep contemplation as soft, natural daylight filters through an unseen canopy, casting gentle, mottled shadows. A calm, steady male narrator begins in clear Standard Mandarin, his baritone voice resonant and gently earnest, stating, “报答苏灿的恩情，老鬼庆也趁着苏灿熟睡之际，把自己的绝学睡梦罗汉拳传授给了他。” Beneath his words, a low-volume, slow-tempo instrumental bed dominated by a guzheng-like plucked string timbre and sustained strings establishes a wistful mood, while the deliberate absence of ambient forest sounds lends the moment a detached, storybook quality.\n\nA straight cut shifts to a static medium close-up framed from the chest up, showing the man now leaning against a massive tree trunk, his weather-beaten face and sparse, dishevelled hair filling the frame. He wears a loosely woven, striped shirt with patched sleeves and cradles a small bundle of pale straw or dried plant matter in his hands. His expression shifts between a faint, grateful smile and earnest concentration as his lips move in quiet sync with the off-screen narration, his eyes glancing down at the bundle before lifting briefly toward something off-screen right. The background remains softly blurred, revealing only dappled greenery and muted earth tones that reinforce the period ambiance. The subdued traditional score persists unchanged, wrapping the scene in a contemplative hush as the camera holds on the man’s quiet reverence, the steady pacing of the narration and the gentle string harmonies blending into a seamless, reflective tableau.","video_1_relative_path":"videos/0bfaf71f62fc459d.mp4","video_2_relative_path":"videos/5db2e9b455b727e0.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/voiceover/voiceover_3/example.json::00000019","text_prompt":"A naturalistic, slightly desaturated documentary scene unfolds under calm, overcast morning light, framed by a steady tripod lens in a medium-long shot from the water’s edge. A narrow waterway winds through dense, waist-high reeds toward distant low farmhouses beneath a grey-white sky as a dark-brown wooden skiff glides slowly from left to right. At the stern, an older woman with short black hair, dressed in a purple short-sleeved T-shirt and dark trousers, braces a long wooden pole against the muddy bank to push the boat forward, while an older man in a pale straw hat and dark jacket sits quietly at the bow, gazing ahead. Gentle ripples lap the hull and soft bird calls echo faintly as a calm, measured male Mandarin voice-over begins in a documentary tone, stating \"It is peak season for taro cultivation, and Old Xia and his wife are busy all day in their paddy fields.\" The camera then cuts to a very wide, static view from behind foreground reeds that partially veil the lower frame, leaving the boat small and distant as it continues its rightward journey through the muted greens of the marshland.\n\nThe perspective shifts abruptly to a fixed close-up inside the vessel, focusing on a weathered wooden gunwale and a single black shoe resting against it. A pair of hands lift a fine-mesh fishing net brimming with wriggling silver fish, shaking it free as droplets scatter into the air. One fish slips back into the murky water with a crisp splash, its tail flicking briefly before vanishing beneath the surface. The ambient soundscape remains minimalistic and grounded, relying solely on the hush of water, occasional birdsong, the subtle rustle of the net, and the sharp splash to evoke authentic rural labor. As the simple, self-sufficient rhythm of wetland farming unfolds under the quiet skies, the calm male Mandarin voice-over concludes with a steady cadence, adding \"Their lunch will be ready right at the field’s edge.\"","video_1_relative_path":"videos/34e9f5d28bf3b416.mp4","video_2_relative_path":"videos/9d1b37a5f61ceaa0.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/voiceover/voiceover_3/example.json::00000036","text_prompt":"A poignant cinematic sequence opens in high-contrast monochrome, shot on a tight lens with a slightly handheld close-up that drifts across two ornate silver picture frames mounted side by side on a wall. The left frame holds a black-and-white portrait of a smiling young woman in a sleeveless dress, while the right displays a formally dressed couple in wedding attire. A slow, melancholic piano arpeggio layered with subdued string pads swells gently beneath a calm female voice-over speaking in reflective Mandarin: “Sixteen is the greatest love for eternity.” The muted earth tones and soft directional lighting soon give way as the scene shifts into color.\n\nA hard cut introduces an elderly East Asian man framed from mid-torso upward, seated against a dark wooden backdrop etched with faint vertical panels. Balding, wearing rimless glasses and a neatly trimmed grey moustache, he is dressed in a light-colored robe detailed with subtle floral embroidery. Soft light from camera-left carves the right side of his face while leaving the opposite side in gentle shadow, deepening the contemplative mood. His gaze drops to a small rectangular photograph or booklet held steadily in both hands at chest level. As his lips move with deliberate slowness, a low-pitched Japanese voice murmurs with solemn resolve: “I will fulfill my daughter’s dream.” The piano and strings continue their quiet, unbroken cadence, underscoring the poignant juxtaposition of youthful memory and an elder’s enduring vow.","video_1_relative_path":"videos/77b1432d800e29d4.mp4","video_2_relative_path":"videos/e65277c19c71a300.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/voiceover/voiceover_4/example.json::00000040","text_prompt":"A tense crime-drama scene unfolds outside a high-security prison complex under soft, overcast daylight, captured in a static medium-wide shot that emphasizes grey stone walls, barbed wire, and a distant watchtower. Near an open gateway where the silhouette of a white bus is faintly visible, three figures stand in tense formation. On the left, a young man in a light-blue short-sleeved shirt and clean-shaven face faces right with an expectant, guarded expression. Beside him, a correctional officer in a black uniform jacket bearing a silver star badge and a peaked cap holds a manila folder at waist height, his posture rigid and authoritative. To the right, an older, heavy-set man in a dark business suit, crisp white shirt, and patterned red tie stares directly at the younger man, his slicked-back greying hair and prominent mustache lending him a stern, official demeanor. As the camera holds steady, a calm, neutral male Mandarin voice-over begins, stating “决定反水，阻止了转移啊。” The ambient soundscape remains hushed and controlled, emphasizing the institutional gravity of the moment.\n\nA straight cut shifts to a tighter close-up, isolating the suited man’s face and upper torso against a softly blurred backdrop of masonry and chain-link fencing. His brows remain knitted in determination as he speaks with firm, measured cadence, his mouth articulating each word with deliberate authority. In sync with his lip movements, a deeper, formal English-speaking male voice delivers the line, “He has a medical condition which precludes transfer.” The camera stays locked off, holding on his resolute expression as the statement settles into the quiet yard, reinforcing the scene’s tense, thriller-like atmosphere and the unspoken power dynamics between the trio.","video_1_relative_path":"videos/e953eb015f89d27c.mp4","video_2_relative_path":"videos/ec2d1d89713a9f6e.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/voiceover/voiceover_6/example.json::00000016","text_prompt":"Cinematic documentary sequence, steady medium close-up, soft naturalistic daylight from camera left, muted neutral palette of light blues and whites. The scene opens on an older East Asian man in a light-blue short-sleeved collared shirt, his slightly perspiring face revealing fine lines and thinning dark hair against a modest, out-of-focus interior of pale walls and white curtains with a small silver desk lamp to the right. The ambient silence underscores a calm, neutral male Mandarin voice-over, who begins stating, \"母亲却和厨子争执起来，因为他是用水手做的诱饵。\" A single straight cut transitions the locked-off, eye-level composition to a starkly different setting: a tight close-up of a younger South Asian man against a bright, high-key white backdrop that flattens his features and heightens the emotional tension. Framed in a plain white T-shirt with shoulder-length wavy dark-brown hair, he initially keeps his eyes closed and brow furrowed in distress before the Mandarin narration yields to a simultaneous English voice-over that matches his lip movements. His expression shifts from pained concentration to sudden shock as he looks downward and then snaps his gaze directly into the lens, delivering the line with firm, hurt emphasis: \"And mother slapped him hard right across the face.\" The static frame holds on his wide-eyed, parted-lip freeze of disbelief as his voice drops to a dazed, slower tempo, concluding with the quiet, resonant admission, \"I was stunned.\" The scene lingers on his stunned visage in the clinical frontal light, leaving only the weight of his testimony in the silence.","video_1_relative_path":"videos/6bc32f1ecca0bbf3.mp4","video_2_relative_path":"videos/36127267d903349b.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/voiceover/voiceover_6/example.json::00000049","text_prompt":"Cinematic documentary style, shot on a 35mm lens with a cool, desaturated palette of whites, greys, and muted browns, opening on a static close-up of a weather-worn wooden fence lightly dusted with fresh snow. Behind the upright posts, blurred evergreens and a small roofed structure sit under a soft, overcast sky as snowflakes drift through the muted daylight. A calm, low-pitched male Mandarin voice-over begins, stating \"冬季，不仅是土地和作物休息的时间，也是忙碌一年的人们归家并团聚。\" The narration is accompanied by a soft, slow orchestral score built from sustained strings and gentle piano arpeggios that establish a reflective winter mood. The camera then cuts to a wide, slightly high-angle view of a snow-covered valley nestled against a forested hillside, where sparse rural houses with dark roofs dot the landscape. Shallow depth of field blurs bare branches in the immediate foreground while keeping the mid-ground village softly focused, maintaining the subdued tempo and contemplative tone of the underscore.\n\nA sharp cut transports the viewer into a brightly lit train-station concourse crowded with travelers, where fluorescent ceiling lights cast an even glow on tiled floors and glass partitions. The handheld camera glides forward through the crowd, capturing the ambient murmur of footsteps and rolling suitcases that blends seamlessly with the continuing orchestral score. A woman in a vivid green puffer jacket and red scarf moves purposefully toward the lens, her intent expression fixed on overhead information boards, her saturated clothing standing out against the cool, neutral tones of the architecture. The scene transitions to an outdoor platform beside a stationary red-and-white passenger train, illuminated by natural daylight softened by cloud cover. A young girl in a bright red hooded jacket walks hand-in-hand with a small child wearing a blue-and-yellow backpack, both looking ahead with quiet anticipation as other passengers linger in the background. The string-and-piano music gently swells to underscore the theme of seasonal return and reunion before tapering off as the image and sound fade out together, leaving a lingering sense of warmth and quiet arrival.","video_1_relative_path":"videos/ca051b640c9da7f7.mp4","video_2_relative_path":"videos/a466b3dd0a09f044.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/voiceover/voiceover_7/example.json::00000000","text_prompt":"Cinematic drama, captured with a 50mm lens and shallow depth of field, opens in a dimly lit, upscale venue awash in saturated magenta and violet bokeh against a palette of deep reds, purples, and blacks. A static medium close-up frames a fair-skinned man with light-brown hair, wearing a dark-gray suit jacket over an open-collared white shirt. His head is bowed and shoulders hunched in dejection as a calm, neutral male Mandarin voice-over begins, stating “三观尽碎的马克起身准备离场。” Beneath the narration, a soft, slow piano melody plays quietly. The man lifts his gaze toward someone off-screen to his right, his expression tightening into restrained anger as his lips part. He speaks in a measured, accusatory tone with a firm American accent, “You think I’m a parasite, don’t you, Mr. Baum?” The narration ceases, leaving only the gentle piano underscore to fill the tense silence.\n\nA straight hard cut reveals the addressee in a matching close-up against a darker, less illuminated background. The East Asian man wears a charcoal suit, white shirt, and patterned tie, offering a faint, knowing smile as he replies in a calm, evenly paced, and mildly sardonic voice, “But, apparently, society values me very much.” The subdued piano persists at a low volume, underscoring the dramatic irony of the exchange. The camera remains completely static throughout, emphasizing the emotional isolation created by the key lighting and blurred background. The frame holds briefly on the second man’s composed face before cutting to black.","video_1_relative_path":"videos/f970f0dd4431e870.mp4","video_2_relative_path":"videos/def610f3aa4f50ff.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/voiceover/voiceover_7/example.json::00000068","text_prompt":"Cinematic historical drama, shot with a 50mm lens and high-contrast lighting. Open on a tight medium close-up of a middle-aged man in plain white robes, seated against dark wooden panels that evoke an austere interior. His long black hair is tied back and a small goatee frames his chin as he squints hard, wrinkles his nose, and throws his head slightly backward in comic recoil. A lively male voice-over bursts out, stating “打出了经典表情包，太残暴了！”, punctuated by a sharp, high-pitched electronic boing that underscores the exaggerated shock. The scene then cuts to a wider shot of a spacious, brightly lit ceremonial hall, where ornate bronze vessels and bowls of food rest on a low table. Centered behind the table stands an emperor figure in an elaborate dark robe embroidered with gold patterns, topped by a tall headdress draped in beaded curtains. Behind him looms a large circular screen painted with a stylized golden dragon, while a courtier in a green robe and black hat stands partially cropped to the left, looking downward. The narrator’s tone shifts to a calm, explanatory register, noting “从来不吃牛肉的周天子，竟收到了宴请…”, as ambient room tone replaces the earlier stinger. The emperor raises his right hand toward his mouth as if to take food, then slowly lowers it, maintaining a composed yet faintly stern expression. The voice-over completes the thought with “…邀请他共赴盛宴。” before the audio cuts abruptly. The tableau freezes for a fraction of a second, holding the stark contrast between the dim wood-paneled memory and the bright ceremonial present, before fading to black.","video_1_relative_path":"videos/f3546a58d94858ca.mp4","video_2_relative_path":"videos/a5283c2013e0493d.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/voiceover/voiceover_7/example.json::00000075","text_prompt":"Cinematic industrial thriller sequence, shot with a 35mm lens and a cool blue-gray palette, bathed in soft, low-contrast directional light. The frame opens on a dim, bluish-gray concrete floor inside a cramped, unfinished basement corridor, where a circular metal drain grate sits flush in the center. The toe of a dark work boot steps into view beside it, grounding the scene in tactile reality. A low, steady electronic drone hums beneath the ambience. A calm, neutral male Mandarin voice-over begins, stating, “Break the floor, clear the pipes below, and prepare for what comes next.” The camera pulls back to a slightly high-angled wide shot, revealing three men in dark work clothes navigating the utilitarian space. A bald man kneels on the left, leaning forward to press his right hand flat against the concrete near the grate, while a companion stands behind him, gesturing toward the floor. Against the rear wall, a red plastic bucket, a folded gray tarpaulin, and a small table holding assorted tools sit quietly in the subdued light.\n\nA tight close-up isolates the kneeling man’s hand as dust motes drift through the weak illumination, followed by a medium close-up of his face. He has a short buzz cut, fair skin, and wears a dark collared jacket over a gray T-shirt, his brow furrowed with intense concentration as he studies the ground. The ambient drone persists, underscoring the quiet tension of the inspection. A second male voice, deeper and speaking with a measured North American English accent, chimes in calmly: “This goes down four feet… and connects to the main pipe.” The scene holds on his focused expression, the cool industrial atmosphere and steady synthetic hum framing a moment of precise, cross-cultural technical assessment.","video_1_relative_path":"videos/bf71530fc145e5e2.mp4","video_2_relative_path":"videos/7867d5be90aecfb7.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/voiceover/voiceover_8/example.json::00000037","text_prompt":"Cinematic nature documentary, cool-toned desaturated palette emphasizing blues, greys, and deep greens. A low-angle wide shot looks straight up through a dense bamboo forest, where dark, nearly black trunks rise in converging lines toward a pale blue-white sky veiled in thin mist and drifting haze. The camera tilts slowly upward in a fixed position, creating a gentle sense of ascent that mirrors the opening narration. A calm, neutral male Mandarin voice-over begins, stating, \"Over two thousand kilometers south, during the same spring equinox, cold and warm air masses clash fiercely.\" Beneath the voice, a soft atmospheric musical bed of low sustained strings blended with airy synthesizer pads plays at a slow, percussion-free tempo, while a faint hiss of light rainfall underscores the scene. The image transitions to an extreme close-up of a single dark-purple-black bamboo shoot emerging from moist soil, its tip adorned with small greenish-yellow bracts. Raindrops streak vertically across the frame, some striking the shoot while others fall past into a defocused background dotted with soft bokeh highlights. The muted palette catches subtle reflections on the wet surfaces as the rain ambience grows slightly more pronounced. Another tight macro shot isolates the serrated edge of a vivid green leaf against a nearly black backdrop, where individual droplets slide along the margin, gather into a larger bead, and detach to fall, each catching brief flashes of light. A faint rustle of bamboo foliage accompanies the visual shift. The sequence concludes with a vertical close-up of a glossy dark bamboo stalk, where a prominent water droplet clings to its side, reflecting surrounding hues before slipping downward out of frame against a smooth, pale green blur. The gentle rain and fading musical pad linger for a final moment before the scene resolves into quiet contemplation, emphasizing the meditative rhythm and interconnected beauty of the natural world.","video_1_relative_path":"videos/a10cd275741de4ab.mp4","video_2_relative_path":"videos/1c603a47b30b30b6.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/voiceover/voiceover_8/example.json::00000043","text_prompt":"Cinematic night scene, 16:9 aspect ratio, warm low-key lighting and a palette of deep shadows against soft bokeh string lights. The frame opens on a tight close-up of a bald man in his late thirties, wearing a dark green zip-up jacket over a lighter shirt. Shot from slightly below eye level, the low-key illumination sculpts half his face in shadow, intensifying the intimate, somber mood. His brow is furrowed and his lips press together before parting; he speaks with quiet determination, his deep Mandarin voice firm and resolute: \"再来寻求宽恕。\" Beneath his words, a subdued orchestral underscore of low strings and distant piano chords establishes a weighty, reflective atmosphere.\n\nThe camera cuts to an over-the-shoulder medium two-shot, placing the bald man in the left foreground with his back partially turned, facing an older man on the right. This second figure, with grey wavy hair tied back, a thick mustache, and a weather-lined face, wears a light beige button-down over a white undershirt. He raises his right hand in a gentle, almost pleading gesture toward the younger man, as a faint floral arrangement between them hints at a modest, private courtyard. The camera then pushes into an intimate close-up of the older man's face, where shadows carve deep lines around his weary eyes and mouth. After a beat of silence, he speaks slowly in Spanish, his gravelly baritone resonating with restrained emotion: \"Encuentra tu muchacha.\" The orchestral bed swells slightly yet never overwhelms his voice, lingering on his solemn expression as the warm lights continue to twinkle softly behind him, leaving the scene suspended in quiet gravity.","video_1_relative_path":"videos/1489f16cc876395b.mp4","video_2_relative_path":"videos/f8ba44088c4050c3.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/voiceover/voiceover_9/example.json::00000004","text_prompt":"Cinematic sequence set in a dimly lit, crowded auditorium during an evening conference, utilizing a warm, low-key palette and a shallow depth of field that isolates the foreground against a softly blurred sea of formally dressed attendees. A medium tracking shot follows a man in his mid-forties with short light-brown hair, dressed in a dark business suit and white shirt, as he walks briskly down the aisle toward camera left. He holds an older-style black mobile phone to his right ear, speaking quietly into the handset while a calm, neutral male Mandarin voice-over begins, “紧接着他就接了一通电话。” The camera glides smoothly, keeping him centered as he moves out of frame, with only the faint room tone and narration audible in the quiet space. The lens then pans gently to the right and settles on a seated attendee named Jerry, a man with dark wavy hair wearing a dark suit and burgundy tie. Initially facing forward, he suddenly turns his head sharply to his right with widened eyes and raised brows, his expression shifting to startled concern. The voice-over continues, “就这样从杰瑞身边掠过，离开了会场,” while the shallow focus keeps the surrounding crowd softly out of frame, maintaining the subdued, intimate atmosphere.\n\nA hard cut transitions to a stable medium close-up of a middle-aged Caucasian man with short greying hair, clad in a dark suit and red tie, standing before the seated audience. He looks directly ahead and delivers a single line in clear North American English, “Mark Baum really did that.” His tone is low, incredulous, and tinged with disbelief, matching the quiet, weightless ambience of the room. The warm lighting casts mild contrast across his face without harsh shadows, and the shot holds on his reaction before the scene fades, leaving only the echo of his words and the subtle room tone in the silence.","video_1_relative_path":"videos/b39d5e3a5cfc3eae.mp4","video_2_relative_path":"videos/19f6f94270defe28.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/voiceover/voiceover_9/example.json::00000068","text_prompt":"Cinematic thriller tone, shot on a 35mm lens with cool, desaturated color grading and soft, diffused shadows cast by overcast daylight streaming through a large window in a dim, industrial concrete room. The camera holds a static medium shot from behind the back of a bald man’s head, focusing on a middle-aged Caucasian man in a light-green short-sleeved button-down over a white T-shirt. He is bent forward, rummaging through an olive-drab canvas duffel bag resting on his lap, revealing several thick bundles wrapped in brown paper that resemble stacks of cash. Beneath the scene, a low, ominous electronic drone sustains a tense atmosphere. A lively, slightly dramatic male Mandarin narrator begins, stating “As soon as he turned around, Fat Head Fish actually pulled out a meat tenderizer.” The camera executes a sharp cut to an extreme close-up of hands slowly rotating a heavy metal meat tenderizer, its rectangular steel head studded with blunt pyramids catching the cold light against a blurred concrete backdrop.\n\nThe sequence returns to a static medium close-up of the man in the green shirt, framed from the mid-chest upward. He looks up toward someone just off-screen to the right, his eyes widening with sudden excitement. Delivering the line with a deep, resonant American accent and slightly theatrical emphasis, he declares, “You know, Roy, this is a monumental moment.” The continuous low-frequency synth pad lingers beneath his words, maintaining the scene’s brooding tension while deliberately suppressing all diegetic Foley to keep the focus tightly on the narration and dialogue. The brisk pacing and deliberate framing guide the viewer’s attention seamlessly from the concealed contents of the bag to the ominous tool and finally to the character’s charged reaction, blending ironic commentary with a gritty, cinematic mood.","video_1_relative_path":"videos/a10a069f7b7057b3.mp4","video_2_relative_path":"videos/b5cf28638c8f365c.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/voiceover/voiceover_9/example.json::00000073","text_prompt":"Cinematic thriller, captured in a tight static close-up that transitions to a high-angle exterior medium shot, bathed in cool bluish daylight filtering through a car window before shifting to overcast brightness on a quiet residential street. The scene opens inside a moving vehicle, framed through the passenger-side window. A woman sits still, her dark hair pulled back to reveal small silver hoop earrings that catch the fading light. She wears a dark gray ribbed turtleneck and stares intently toward the right edge of the frame, her eyes wide, brows slightly lifted, and mouth parted as if caught mid-breath. Behind her, the world outside blurs into streaks of pavement and trees, emphasizing relentless forward motion. Over this image, a tense, low-register orchestral score begins immediately, sustained cellos and double basses driving a slow, ominous pulse at a whisper-quiet dynamic that swells imperceptibly. A calm yet accusatory male voice, speaking in standard Mandarin with controlled tension, begins stating, “看看这个眼神，你还记得当初是怎么折磨我的吗？” (“Look at this look—do you still remember how you tortured me back then?”). The recording is acoustically dry, stripped of all ambient street noise or engine hum, focusing entirely on the psychological weight of the moment.\n\nA hard cut shifts to a high-angle exterior medium shot of a black SUV parked on a leafless, tree-lined street beside brick houses. The same man steps deliberately from the driver’s side, bald and clad in dark sunglasses, a charcoal jacket over a collared shirt, and khaki trousers. His posture is rigid and focused as he plants one foot on the ground, leaning into the open doorway while a second dark sedan sits idle further down the curb. The camera holds steady, capturing his full figure against the muted suburban backdrop as the orchestral underscore maintains its brooding presence. A sharp cut returns to the woman’s interior close-up; her expression remains frozen, gaze unwavering, lips still parted. The blurred scenery continues to streak past behind her as the low strings sustain their dissonant, foreboding drone. The scene lingers on this silent standoff, the music swelling just enough to underscore the unresolved tension before the image and sound cut simultaneously, leaving only the echo of the accusation hanging in the air.","video_1_relative_path":"videos/2777f52f08f5654b.mp4","video_2_relative_path":"videos/463fc867b6fb6d13.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_davinci/multitalker/multitalker_1/example.json::00000068","text_prompt":"A cinematic medium close-up, locked-off camera with shallow depth of field, captures an intimate domestic scene bathed in warm, low-key lighting and an earth-toned palette. Two figures recline side-by-side on a brown leather couch draped with a red-and-tan crocheted blanket, while a softly blurred wooden bookshelf and plaid curtain anchor the background. The older man on the left, balding with thin-rimmed glasses and a mustache, wears an olive-green button-down over a dark undershirt and cradles a small glass of opaque orange-yellow liquid. His posture is relaxed yet tense, brow furrowed as he watches the middle-aged woman beside him, her fair-skinned face resting against his shoulder, eyes closed in quiet exhaustion. A faint fabric rustle breaks the silence before he leans in fractionally, his low, gentle voice cutting through the quiet room tone: \"Hey, everything okay?\"\n\nShe does not open her eyes or answer immediately. After a heavy pause, she exhales quietly and replies in a subdued, weary tone, \"No.\" Keeping her gaze inward, she adds, \"Not really.\" The man’s expression tightens; his grip on the glass steadies and his shoulders draw closer to hers, radiating quiet concern. A momentary silence follows, broken only by her short, breathy scoff of frustration before she begins again, \"Actually, there is something wrong,\" but her voice trails off into hesitation, leaving the unspoken weight hanging in the warm air. The camera holds steady as both remain motionless save for their steady breathing, the soft shadows and homely atmosphere deepening the scene’s underlying tension and emotional fatigue.","video_1_relative_path":"videos/59cf1f05c218b689.mp4","video_2_relative_path":"videos/cb9695188ec959f4.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_davinci/multitalker/multitalker_1/example.json::00000070","text_prompt":"A cinematic medium close-up, static camera, bright even lighting, and a shallow depth of field frame two young men standing side by side in a sunlit school common room, their matching purple double-breasted uniforms detailed with white piping, gold buttons, striped ties, and subtle chain-and-crest insignia that suggest a prestigious academy. The man on the left, wearing glasses and dark hair with a blue-tinted fringe, exhales audibly as his shoulders sag and his gaze drops to the floor. Beneath this quiet resignation, a continuous, low-volume melancholic piano-and-string underscore in a slow minor key establishes a reflective, somber mood, with no ambient room noise to distract from the intimate space. The man on the right lifts his head, turns toward his companion, and rests a gentle hand on his shoulder. A calm, earnest male Mandarin voice speaks: “你不要再说气话了。” His eyebrows rise and fall with the gentle admonition, blending concern with steady reassurance. The listener remains still, offering only a faint nod before slowly raising his eyes just enough to acknowledge the words. The same male voice continues, his tone deliberate and weighted: “最近学校发生这么多事情，又来了这么多新同学。” He lets his voice swell slightly on the repeated phrases, his expression tightening before softening into a sympathetic half-smile. He pauses, searching for the right words, then completes the thought with a quieter resolve: “大家都还在努力互相扶持。” The camera holds its static position, capturing only the subtle shifts in their expressions as the instrumental score lingers, leaving the moment suspended in quiet camaraderie and unspoken tension.","video_1_relative_path":"videos/c235f6740012a09d.mp4","video_2_relative_path":"videos/f4145b8f762a7dc7.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_davinci/multitalker/multitalker_4/example.json::00000094","text_prompt":"A static medium shot frames a bright, sun-drenched salvage yard under harsh midday sunlight, casting sharp shadows across crushed vehicles, dusty ground, and distant low hills under a clear sky. A bald man in a dark plaid flannel over a gray T-shirt and dark trousers stands with his shoulders slightly tense and hands resting at his sides, watching intently. Beside him, a man with short dark hair wearing a diagonal black-and-white striped button-down and light khaki pants is bent forward, eyes lowered, catching his breath with a deep, audible inhale followed by an extended exhale that cuts through the faint, steady outdoor ambience.\n\nThe striped-shirt man straightens and turns to face his companion, lifting both hands to chest height with palms inward and fingers splayed as he begins to speak in a mid-low, slightly raspy North American voice, weary yet attempting calm reassurance: \"Heisenberg says relax.\" He continues gesturing, hands opening wider then drawing closer together as if illustrating the release of tension, his heavy breathing still audible between phrases. As the line finishes, he lowers his hands and both men hold their positions in a quiet beat, the ambient soundscape settling into stillness while the stark, gritty atmosphere of the yard underscores a moment of strained reassurance and unspoken deference.","video_1_relative_path":"videos/61bfab1bab71f3b4.mp4","video_2_relative_path":"videos/f6f978e61ce0523a.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_davinci/multitalker/multitalker_5/example.json::00000083","text_prompt":"A tense, documentary-style nighttime scene unfolds in a handheld medium shot, capturing an elderly East Asian man standing beside the open driver’s door of a white van. The vehicle’s hood bears bold blue Chinese characters and a small red circular logo, anchoring the setting in an industrial district. He is dressed in a beige jacket over a white collared shirt, gripping a white megaphone with black trim in his right hand while a dense crowd of young men in dark jackets and shirts presses closely around him. Cool bluish artificial light washes over the scene, sharply contrasted by warm pink-purple accents bleeding from off-camera sources, casting dramatic shadows and high-contrast highlights against the night. The camera holds steady with a subtle handheld tremor, immersing the viewer directly into the crowd’s perspective as the speaker gestures emphatically—pointing forward, opening his palm, then sweeping both arms outward to address the gathered group.\n\nAudio begins immediately with a resonant, amplified male Mandarin voice cutting through the quiet night, declaring, “到过这个厂每一个车间，我熟悉这个厂每一个角落。” The delivery is passionate and declarative, rising in intensity as he emphasizes his deep institutional knowledge before landing on a firm downward inflection. Beneath the speech sits a faint, slow-tempo orchestral score dominated by sustained minor-key strings that evoke solemnity and resolve, layered low in the mix to add dramatic gravitas without masking intelligibility. The acoustic environment remains tightly controlled, stripped of wind, traffic, or crowd murmur to focus entirely on the address, while the speaker’s measured breathing and the subtle handling of the megaphone ground the moment in raw documentary realism. The orchestral undertones swell imperceptibly beneath his final words, leaving the scene charged with a cinematic tension that blends intimate street-level observation with a quiet, rallying grandeur.","video_1_relative_path":"videos/edff19e360a8a527.mp4","video_2_relative_path":"videos/7aa56763c6952d87.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_davinci/multitalker/multitalker_5/example.json::00000085","text_prompt":"A tense, grounded crime drama scene unfolds in a modern open-plan office bathed in cool, even fluorescent light, captured with a medium tracking shot that follows two professionals walking side-by-side toward the camera along a corridor lined with frosted-glass partitions and grey storage cabinets. An East Asian woman with a straight black bob, wearing a maroon V-neck short-sleeved top and a delicate gold necklace, walks slightly behind an older East Asian man who is bald on top with closely cropped sides, rimless glasses, a neat goatee, and a pale-blue shirt beneath a dark pin-striped waistcoat. Their footsteps echo softly on the hard floor while distant office chatter hums in the background. A measured, assertive female Cantonese voice begins, stating \"Because just now you told me to filter the news.\" She turns her head toward him, maintaining eye contact as she adds, \"Sir Li, this doesn't seem like CP's authority.\"\n\nThey reach a spot beside a tall cabinet, and the camera cuts to a static medium close-up profile framing both characters from the chest up. They stop walking and face each other as the shallow depth of field blurs the background, isolating their confrontation. The man inhales, his lips tightening and eyes narrowing with irritation and authority, then responds in a low, authoritative Cantonese voice: \"Wrong.\" Without shifting his posture, he delivers a decisive rebuttal, stressing his institutional backing: \"I'm giving you police regulations to believe. I absolutely have that authority.\" The woman listens silently, her face composed yet intent, while the ambient office noise persists at a low level beneath their voices. The scene lingers on their locked expressions, tension hanging heavy in the air as the shot holds on their standoff before fading out.","video_1_relative_path":"videos/f70a629dab83cc82.mp4","video_2_relative_path":"videos/6afc054b9f95cad3.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_davinci/multitalker/multitalker_6/example.json::00000010","text_prompt":"A vibrant, documentary-style scene unfolds in a brightly lit high-school hallway, captured in a single continuous backward-tracking medium-wide shot at eye level. Even, warm fluorescent illumination washes over neutral beige walls lined with vivid red metal lockers, establishing a youthful, high-contrast color palette that contrasts sharply with the students’ colorful attire. An illuminated red EXIT sign glows above double glass doors at the far end, anchoring the institutional setting. Jeremy, an East-Asian teenager in a blue-and-white polo shirt and black backpack, walks forward with animated energy, gesturing as he speaks. A calm, enthusiastic American-accented male voice begins, stating \"So we eat in a library every day. You’re welcome to join us.\" Beside him, a shorter white teenager in a brown-and-black plaid button-down listens attentively with hands on his backpack straps, while a Black female friend in a red striped T-shirt and short curly hair walks alongside, smiling. Low-level crowd murmur and the faint scuff of sneakers on tile underscore the naturalistic soundscape. As the trio advances deeper into the corridor, Jeremy’s tone remains upbeat and friendly, his voice adding, \"It’s much better than the cafeteria.\" The camera maintains its steady retreat, preserving a moderate depth of field that keeps the foreground interaction crisp while background figures—including a man in a dark suit near the doorway and students passing in colorful attire—drift softly out of focus. The plaid-shirted teenager now takes over, his calm, matter-of-fact American-accented male voice explaining, \"It’s quiet, and a lot less food gets thrown at us.\" His female companion nods appreciatively, lips curved in a small smile, as the ambient hallway chatter and echoing footsteps continue to ground the scene in documentary realism. The group keeps moving forward toward the lens, framed by the lively, youthful atmosphere of the school environment.","video_1_relative_path":"videos/84d228dbd0da2016.mp4","video_2_relative_path":"videos/52d752a1cb6818ef.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_davinci/multitalker/multitalker_6/example.json::00000035","text_prompt":"A wide, eye-level shot captures a bustling Ming-era Chinese marketplace, stone paving receding toward the camera beneath lush green foliage and wooden stalls draped in blue-and-white striped awnings. Natural daylight casts soft, dappled shadows across the scene, where dozens of townsfolk in traditional Han-style robes move through the thoroughfare, some carrying woven baskets while others haggle over goods. At the upper right, a tall purple fabric banner bearing the white brush-stroke characters for \"Foreigner Post House\" hangs from a timber pole, fluttering gently in the breeze. Over the ambient murmur of overlapping voices, cloth rustling, and distant cart wheels, a calm, slightly weary northern Mandarin male voice breaks the scene, stating \"会啊。\" before continuing with steady, accusatory force: \"这件事，我一定会参你。\"\n\nTwo figures stride purposefully toward the lens along the central axis, their contrasting attire underscoring a tense standoff. On the left walks a man in a pale sage-green robe layered over lighter silk, secured with a black sash and an ornate hairpin; he maintains a stoic, forward-gazing demeanor. Beside him, a second man in dark navy-black garments adorned with subtle wave-pattern brocade and a broad black belt fastened by a gold buckle matches his pace, his brows knit and jaw set with controlled anger. As pedestrians instinctively part to let them pass, the dark-robed man answers without breaking stride, his voice rising with measured defiance: \"你一个可不够。\" He glances sideways at his companion, a faint, challenging smirk touching his lips, before adding a final taunt with a light gesture of his right hand: \"多找几个，一块儿参我。\" The dialogue remains foregrounded with minimal reverb, crisp against the immersive location ambience, as the pair continue their symmetrical march toward the camera. The scene concludes mid-stride, leaving the political tension hanging in the air while the marketplace hum carries on.","video_1_relative_path":"videos/f73da4f2fd7ff30f.mp4","video_2_relative_path":"videos/e7f09c1b4ebc69a8.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_davinci/multitalker/multitalker_7/example.json::00000078","text_prompt":"Cinematic fantasy sequence, static medium-wide shot, even frontal lighting against a dark, smoky teal-grey backdrop that evokes a mystical academy. Two young men stand side-by-side in identical deep-purple double-breasted blazers with white piping, grey trousers, crisp white shirts, and black-and-white diagonal-striped ties, each bearing a gold winged crest on the left breast. The bespectacled man on the left turns to his slightly taller companion, his fists loosely clenched at his sides. A firm, urgent male Mandarin voice begins, stating, “I will use our magic to bind us together, so we are never separated again.” The second man listens with wide, concerned eyes, his posture rigid, while a low, ominous electronic drone hums beneath the scene, gradually joined by faint crackling energy sounds.\n\nThe speaker finishes his sentence, and the listener nods once. A calm, resolute male Mandarin voice replies, “Agreed.” Instantly, both men pivot their torsos inward, raising their hands to chest height with elbows bent and palms facing each other, fingers splayed as if grasping an invisible force. A brilliant blue horizontal beam erupts between them, momentarily washing out the center of the frame, while a sharp crystalline chime rings out followed by rapid ascending arpeggios and a swelling whoosh. Two translucent, glowing blue circular sigils materialize around their raised hands, pulsing outward with concentric rings of light. The locked-off camera holds steady as the score swells into a dramatic orchestral-electronic flourish, layering strings, brass stabs, and percussion over the continuing bass drone. The central beam fades, leaving only the luminous circles hovering near their wrists, emitting a soft ethereal shimmer as the music sustains its peak intensity before gradually diminishing. Both performers maintain their poses, eyes focused forward, faces set in determined concentration, freezing the charged tableau as the scene concludes.","video_1_relative_path":"videos/c795edc1ce26c146.mp4","video_2_relative_path":"videos/6737d7c0bc4d3797.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_davinci/voiceover/voiceover_3/example.json::00000019","text_prompt":"Cinematic thriller, shot with a handheld 35mm lens, opens in a cramped, dim bedroom bathed in cold teal-green light that spills from an unseen source at camera left, establishing a fever-dream atmosphere through low-key monochrome grading. The camera hovers just above the bed, its subtle shake conveying urgency as it looks slightly down on a man lying on his back beneath a pale striped sheet and a dark floral blanket bunched at his waist. His short dark hair is damp and matted, a thin goatee framing a mouth twisted in pain, while a thick silver chain glints against his black shirt and dark denim jacket. He winces, teeth clenched and eyes squeezed shut, as a calm, grave female Mandarin voice-over begins, stating \"器官机能严重损坏，瘦得人模鬼样。\" The camera angle shifts slightly higher, catching his right profile as he rolls onto his side and props himself on an elbow, sweat beading on his forehead. Deep shadows carve beneath his jaw and along the pillow, maintaining a hushed ambience where only the narrator’s clinical detachment and a faint room tone break the silence.\n\nA hard cut thrusts the viewer into a narrow hallway lined with dark, vertically paneled walls and framed by ornate gold-trimmed mirrors. Warm amber sconces cast pools of light that contrast sharply with the previous scene’s cool palette, creating a chiaroscuro noir tension. Center-frame stands a second man, his short dark hair and trimmed beard sharp against a black double-breasted coat cinched with a belt and silver buckle. He looks downward toward someone off-screen, lips moving slowly as a low, resonant male voice speaks: \"最后你的体重。\" His delivery is measured and ominous, amplified by a static medium shot that isolates him and heightens his authority. Behind him, a rectangular white plaque mounted high on the wall bears two bold black calligraphic characters, the second clearly reading “憎,” visually anchoring the scene’s themes of moral reckoning and supernatural judgment before the frame cuts to black on his final syllable.","video_1_relative_path":"videos/21392e712d8e3438.mp4","video_2_relative_path":"videos/4747a14c6c3a5b3f.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/instruments/instruments_1/example.json::00000067","text_prompt":"A locked-off medium-wide shot frames a quiet recital hall stage bathed in bright, even overhead illumination that casts soft shadows and highlights a neutral palette of light-brown perforated walls, dark wood flooring, and tiered seating in the background. A middle-aged male cellist in black attire sits upright on a concert chair beside a black grand piano and two large studio microphones on stands. He draws the bow across the lowest string, releasing a deep, resonant cello tone accompanied by a faint mechanical click of hair meeting string. His right arm settles into a steady down-up stroke pattern while his left hand presses firmly on the fingerboard, establishing a warm, woody timbre with clear fundamentals and modest upper harmonics. The solo performance drives forward with a consistent rhythmic pulse, the cellist’s shoulders rising and falling with each controlled bow push and pull. The melody weaves through steady eighth notes punctuated by crisp sixteenth-note flourishes, with open-string drones grounding the line as his fingers execute rapid ascending and descending shifts along the neck. A gradual dynamic swell builds as bow pressure intensifies, lifting the volume and enriching the harmonic overtones while the acoustic space wraps each note in a gentle natural reverb. The passage climbs into a climactic flurry of swift alternating strokes, generating a cascading cluster of bright tones that finally resolve downward into a sustained low tonic. As the bow slows and the left hand settles into its final position, the cellist lowers the instrument, relaxes his posture, and allows the room’s natural reverberation to fade into near silence, leaving only the subtle resonance of wood and string.","video_1_relative_path":"videos/150b351b74b67eca.mp4","video_2_relative_path":"videos/6db9341ce2d45ca0.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/instruments/instruments_2/example.json::00000056","text_prompt":"Cinematic medium shot, soft even lighting, and a stone-textured sanctuary interior set a solemn tone as a static frame captures a ritual scene. At the left, a shofar player stands waist-up, holding the curved horn horizontally with lips pressed firmly to the narrow mouthpiece. Beside him, a male vocalist at a podium begins a liturgical chant in Hebrew, his warm, slightly nasal voice carrying a gentle vibrato as he states \"הַגּוֹיִם יְדוּלָא\". The vocal delivery is legato and moderately loud, resonating clearly in a close-mic capture with only a whisper of natural room reverb, while the shofar player remains perfectly still, his cheeks puffed and jaw steady as he prepares for the transition.\n\nJust as the final syllable fades, the shofar erupts with a piercing, high-pitched blast that instantly dominates the soundscape. The player’s facial muscles tighten and he leans slightly forward as his lips vibrate rapidly against the mouthpiece, channeling a full-lung burst of air that produces a sharp, fortissimo attack. The tone stabilizes into a long, unwavering sustain—a bright, metallic resonance rich with upper harmonics that fills the sanctuary without modulation or accompaniment. Throughout the prolonged note, the performer maintains ritualistic stillness, making only minute breath corrections and micro-adjustments to his embouchure, while the visual immobility mirrors the unbroken sonic continuity, underscoring the profound solemnity of a traditional Rosh Hashanah or Yom Kippur service.","video_1_relative_path":"videos/34592a218c70f2f2.mp4","video_2_relative_path":"videos/0629deccea83acd9.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_10/example.json::00000063","text_prompt":"Cinematic sitcom-style medium shot, locked-off camera at eye level with moderate depth of field, capturing a warm, evenly lit apartment living room and kitchen set reminiscent of a classic American multi-camera comedy. The palette features soft pastels, warm wood cabinetry, and stainless-steel appliances, with a wall-mounted lamp casting gentle, shadow-free illumination. In the foreground, Penny stands facing Leonard, who is framed from behind, his curly brown hair and black-rimmed glasses visible. Penny, with a blonde bob and wearing a pastel floral zip-up hoodie over a bright pink T-shirt, gestures with a quick, dismissive flick of her right hand as she launches into an animated, exasperated monologue. Behind them, slightly out of focus, Sheldon sits on a beige couch in a red T-shirt, turning his head to observe the exchange with a neutral expression. A faint, continuous studio audience laughter bed underscores the scene, keeping the mood light and conversational.\n\nA lively, slightly sarcastic American female voice begins, stating \"She got here today and she's just been in my apartment yakety-yakking about every guy she slept with in Omaha, which is basically every guy in Omaha.\" As she speaks, Penny punctuates her words by opening her palm toward Leonard before drawing it back in a small circular motion, her delivery brisk and clear. The audience laughter swells gently beneath the final phrase, marking a classic comedic beat. Leonard remains silent, listening attentively, while Sheldon maintains his quiet, observant posture. The camera holds steady, preserving the warm, homely atmosphere and the subtle interplay of foreground sharpness against the softly blurred background.\n\nPenny’s expression shifts to expressive disbelief as she begins another thought, her voice trailing into frustration before she completes the sentence with a clipped, \"And why does she feel compelled to recount every single one?\" Her lips part mid-reaction, frozen in a moment of comedic exasperation as the audio cuts to a brief, deliberate silence. The scene lingers on the static composition, allowing the warm lighting and sitcom framing to hold the final beat before fading.","video_1_relative_path":"videos/128622010ba7fb2b.mp4","video_2_relative_path":"videos/f8cbd20ff07c1fd0.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_11/example.json::00000037","text_prompt":"Grounded in a naturalistic indie drama style, a locked-off medium close-up frames a young Caucasian man from mid-chest upward, positioned slightly left of center against a pale beige wall marked by a faded grey flower stencil and topped with leafy green foliage. Shot with a shallow-to-moderate depth of field, the composition isolates the subject in soft, even dusk lighting that leans neutral-cool, casting minimal shadows across his short spiky light-brown hair, blue eyes, and faint stubble. He wears a vivid red crew-neck T-shirt beneath an unzipped black hoodie with a white lining and a small red-and-black graphic on the chest, creating a sharp contrast against the muted earth tones of the environment. To his right, in the extreme foreground, only the back of a listener’s dark hair and glasses are visible, establishing an intimate, one-sided exchange. A low, continuous chorus of crickets fills the air, grounding the scene in a quiet outdoor nighttime ambience without masking the dialogue.\n\nSpeaking with a low, hesitant cadence and a slightly breathy General American timbre, the man begins his thought with audible pauses and soft inhalations, conveying nervousness and cautious hope. He glances downward before lifting his gaze to the unseen listener, his brow furrowing as he carefully articulates, \"I'm just saying, if you ever saw your way clear to it, you know, you and I could cook a little more.\" His expression remains earnest yet guarded, a micro-smile flickering across his face before tension returns and the listener stays perfectly still. As the final words leave his lips, his features settle into a neutral, expectant look, holding the gaze for a beat before a faint, almost reluctant smile surfaces. The camera remains completely static, allowing the subtle performance nuances and the steady insect chorus to carry the scene’s underlying conflict and tentative reconciliation until the image fades to black.","video_1_relative_path":"videos/dbd6bb4005c082e1.mp4","video_2_relative_path":"videos/e48370af912858da.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_12/example.json::00000012","text_prompt":"Open on a static medium two-shot inside a dimly lit jazz club rendered in deep blues and warm amber highlights. A shallow depth of field keeps the foreground razor-sharp while softly blurring the elevated stage behind it, where a live trio—trumpet, saxophone, upright bass, and piano—plays a gentle swing rhythm. Warm directional key lights illuminate the faces of a man and a woman seated at a small round table anchored with drinks, while cool blue backlights rim their shoulders through a subtle atmospheric haze. Over this diegetic ambience, a clear, mid-range North-American male voice begins to speak earnestly, his hands moving slightly above the tabletop as he leans forward, eyes fixed on his companion, stating, “People were crammed in there. They spoke five different languages. They couldn't talk to each other.”\n\nThe woman, wearing a white T-shirt with shoulder-length wavy brown hair, listens attentively, her head tilted toward him in calm engagement. As he stresses his point, his gestures grow more animated before his delivery slows into a reflective cadence, concluding, “The only way they could communicate was with jazz.” A faint, understanding smile touches her lips as the brushed snare, walking bass, and distant trumpet continue their unobtrusive performance beneath the dialogue. The camera holds the intimate composition steady, the blurred musicians in the background visually echoing the spoken theme: when language barriers exist, music becomes a universal bridge. The scene lingers on this emotionally resonant, unresolved moment, bathed in the club’s moody, late-night atmosphere.","video_1_relative_path":"videos/74eb827b7bb41d78.mp4","video_2_relative_path":"videos/d0f40de92e9bd8d2.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_12/example.json::00000031","text_prompt":"Opening on a medium close-up under soft, overcast daylight, a young East Asian woman stands on a paved suburban driveway, her dark hair tied in a low ponytail beneath a white baseball cap bearing a black interlocking “SF” logo. She wears a light-grey hoodie layered under a shiny sky-blue sleeveless puffer vest, and a calm, neutral female Mandarin voice begins, stating “四个人坐下来打打麻将，还可以促进一下感情。” The camera holds a steady, shallow focus that gently blurs the out-of-focus trees and brick garage door behind her, keeping the mood intimate and grounded. A reverse over-the-shoulder shot then reveals the man she is addressing, an East Asian adult in a black “SF” cap, blue-and-white plaid shirt, and beige quilted vest, with a white pickup truck parked softly out of focus in the background. His attentive expression melts into a broad, warmly amused smile as a warm, affectionate male Mandarin voice replies with a light chuckle, “我怎么有个这么优秀的太太呀？”\n\nThe frame naturally widens to a full family tableau beside a silver Subaru SUV, its chrome “HERCULES” badge catching the diffuse light, while a small child in a bright-blue puffer jacket clings to the woman’s left leg, clutching a pale stuffed toy. The man steps forward, rests his hands on her shoulders, and pulls her into a brief, heartfelt embrace, and a half-teasing, sentimental male Mandarin voice murmurs, “要是没有了你我该怎么办？” The scene is bathed in even, shadowless daylight, with a cool palette of muted greys, blues, and earthy browns punctuated only by the child’s vivid jacket and the subtle greenery beyond a neat white picket fence. Minimal ambient sound underscores the quiet domesticity as the trio lingers in this warm, slice-of-life moment, the camera remaining static and intimate throughout to preserve the unspoken tenderness of the exchange.","video_1_relative_path":"videos/3fab66def64c2847.mp4","video_2_relative_path":"videos/6e916e3579569fe2.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_12/example.json::00000058","text_prompt":"Shot on a cinematic 50mm lens with a shallow depth of field, a quiet domestic drama unfolds in a warmly lit modern kitchen, bathed in soft natural daylight streaming through a window above the sink that casts gentle reflections across stainless-steel appliances and dark reddish-brown wooden cabinetry. The scene opens in an extreme close-up at center frame, where two pairs of hands meet: one belonging to a man in a dark grey rib-knit sweater, the other to a woman in a light-grey zip-up hoodie. He offers a crinkled brown paper bag containing a loaf of bread wrapped in clear plastic, and as their fingers close around it, a crisp rustle of paper and plastic fills the air. A subdued, weary male voice in Mandarin begins, stating \"我失业了。\"\n\nThe camera cuts cleanly to a medium shot, revealing the woman from mid-torso upward beside a refrigerator door crowded with family photographs, handwritten notes, and colorful magnets. Her dark hair is pulled back in a loose bun, and beneath her hoodie, a heather-grey T-shirt displays a black line-art graphic of Snoopy skateboarding alongside bold red lettering that reads \"RUN TO YOU.\" Holding the bag in her left hand, she turns slightly toward him, her expression gentle but tinged with concern. A calm, reassuring female voice in Mandarin with a mild northern inflection replies, saying \"没事，再找呗。\" while gesturing lightly with her free right hand, palm up, before lowering the bag out of frame. The camera lingers on her composed, empathetic face as she glances down toward the countertop, the minimalist soundscape reduced to faint room ambience and the quiet settling of the moment, evoking a profound sense of partnership and everyday resilience before the scene fades to black.","video_1_relative_path":"videos/856ad3568ad0de8a.mp4","video_2_relative_path":"videos/941854617c7a0176.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_3/example.json::00000016","text_prompt":"A gritty urban drama unfolds in a locked-off wide shot at eye level, bathed in the diffuse, overcast daylight that casts soft shadows and establishes a desaturated palette of greys, whites, and muted greens across a quiet Japanese street. A white four-door sedan is parked parallel to the curb, its chrome hubcaps catching the pale light. On the left, a man in a dark charcoal suit and black shoes stands with his hands tucked into his pockets, short hair styled upward, posture relaxed yet alert. Opposite him near the car’s rear door, two teenage students in matching light-grey uniforms with dark piping stand shoulder-to-shoulder, heads bowed in respectful silence. The blond student, Ishibashi, grips a black briefcase at his side, while his dark-haired companion, Yoshimura, holds a similar bag. Behind them, a low industrial building with a corrugated metal façade displays a green sign reading “京進商事”, while power lines and a utility pole cut thin diagonal lines across the sky. A calm, authoritative Japanese man in the charcoal suit speaks, stating, \"組の薬を勝手に売りさばいてた。\" The ambient street hush remains minimal, underscoring the restrained tension of the standoff.\n\nThe camera holds its fixed position, framing the trio with deliberate rule-of-thirds composition that leaves the white sedan as a silent bridge between them. After a brief pause where no one moves, the suited man resumes, his voice steady and matter-of-fact: \"金髪の石橋と吉村って高校生にやられたらしい。\" The students remain perfectly still, maintaining their respectful silence as the low room-tone ambience fills the space. The subdued contrast and everyday grit of the setting reinforce a sober, realistic mood, hinting at an underworld conflict without overt action. The scene concludes with all three figures frozen in their original positions, the calm tension lingering in the quiet street as the final syllable fades into the ambient hush.","video_1_relative_path":"videos/33bc815462557d64.mp4","video_2_relative_path":"videos/251876595ebbe6e4.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_3/example.json::00000077","text_prompt":"A locked-off wide shot captures a warmly lit living room adjoining a modest kitchen, rendered in earth tones of brown, beige, and muted red that establish a cozy yet somber mood. Soft daylight blends with incandescent interior lamps, casting gentle shadows across the static frame. On the left, a bald, heavyset man in a rust-orange short-sleeved button-down and dark trousers sits rigidly on a striped armchair, elbows on his knees, gaze lowered toward a coffee table scattered with gourd-shaped vases, masking tape, and papers. In the center, a blonde woman in a light grey long-sleeved top over a white camisole sits upright on a brown leather sofa, hands clasped between her knees, her expression fixed with concerned concentration. To her right, a brunette woman in a black cardigan over a purple top and short skirt reclines against the sofa, legs crossed, clutching a red cushion while a large purple handbag rests on the floor. The ambient soundscape is nearly silent, broken only by a faint room hum. The brunette woman, her voice calm yet tinged with concern, states, \"I think the very fact they haven’t found him yet bodes well.\"\n\nThe room holds its breath as she finishes, the man remaining motionless and the blonde woman shifting her weight subtly without breaking eye contact. The background reveals a wooden hutch displaying dishes and trailing greenery, alongside a kitchen with wooden cabinets, a white refrigerator, and plaid curtains quietly illuminated. After a measured pause, the brunette woman leans forward slightly, her tone dropping into hesitation: \"Well, I mean, if he’s still out there on his own, he might be safer than if he’d been caught already.\" Her words hang in the still air, leaving the conversation suspended in cautious optimism and quiet worry, the camera holding its fixed position as the domestic tension settles over the scene.","video_1_relative_path":"videos/7a2fa0dcd789a19b.mp4","video_2_relative_path":"videos/925b0db628b4a2b0.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_4/example.json::00000032","text_prompt":"A quiet domestic drama unfolds in a static medium close-up of Woman A seated at a light-colored wooden table in a bright, modern dining space, where large windows with horizontal blinds filter soft, diffuse daylight across the scene. She wears a dark olive-brown ribbed V-neck sweater with her long black hair loosely pulled back, a brown-and-red plaid coat draped over her chair. Her brow is slightly furrowed as a subdued, fatigued female Mandarin voice speaks in a low, weary tone: \"Not to mention going back to China.\" The room remains completely still and silent, with the muted earth tones of her sweater and the wooden furniture contrasting subtly against the cool whites and greys of the window blinds, reinforcing an intimate yet restrained mood.\n\nA straight cut shifts to an identical medium close-up of Woman B sitting opposite her, framed against the same windowed backdrop. Her long, wavy chestnut-brown hair falls over a dark navy double-breasted coat fastened with two prominent white buttons, revealing a glimpse of a white inner collar and a fine silver necklace. She lowers her gaze briefly before lifting it to meet Woman A’s, listening intently in the hushed atmosphere. Offering a faint, empathetic smile, she tilts her head and lifts her right hand in a small, deliberate gesture with her palm facing inward and fingers relaxed. A calm, reassuring female Mandarin voice follows: \"Rest assured, sister-in-law. I will not mention this to anyone.\" The camera holds steady, keeping both faces sharp while the blinds outside stay softly blurred, and the scene concludes in a moment of quiet stillness, the absence of music or ambient noise focusing all attention on the weight of her promise.","video_1_relative_path":"videos/b30dfe429ec0970b.mp4","video_2_relative_path":"videos/2e68444338a90f44.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/music/music_2/example.json::00000022","text_prompt":"Cinematic indie-folk performance captured in a static medium shot at eye level within a sunlit, open-air gazebo framed by a stone balustrade and lush greenery. Natural daylight floods the space, casting soft shadows across a light-gray tiled floor and illuminating two male musicians from the waist up. The performer on the left wears a backwards dark-blue baseball cap, a beige long-sleeved shirt, and dark pants, his natural-finish acoustic guitar decorated with a rectangular “Haleiwa HAWAII” sticker and a circular green “MUSIC TRAVEL LOVE” decal. He strums steady chords with his right hand while fretting with his left. Beside him, the second musician sports a tan forward cap, a white T-shirt beneath an unbuttoned plaid flannel, and light-wash jeans, playing a smaller parlor-sized acoustic guitar with alternating strumming and fingerpicking patterns. Both stand before black microphone stands, their expressions relaxed and engaged, exchanging occasional smiles and brief eye contact as they sway slightly to the rhythm. Audibly, a gentle seventy-two-beats-per-minute arrangement unfolds, driven by two acoustic guitars and a subtle shaker maintaining a slow, even pulse. Two male tenor voices enter in smooth, blended harmonies, delivering the lyric “time, heart, please don’t fall as hard as it seems” with light vibrato and breathy phrasing, their synchronized lip movements and soft inhalations grounding the performance in reality. A faint, low-frequency hum lingers beneath the mix, suggesting the quiet enclosure of the gazebo, while occasional string squeaks and the rustle of clothing add organic texture. The dynamics remain consistently soft and warm, with no crescendos or instrumental shifts, until the vocal line concludes and the final chord rings out, leaving only the lingering resonance of the guitars and shaker to fade into the serene, sun-drenched atmosphere.","video_1_relative_path":"videos/a47c8f71266ceffa.mp4","video_2_relative_path":"videos/f143ca350532c139.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/music/music_2/example.json::00000035","text_prompt":"Cinematic live performance, medium-wide static shot, saturated red and warm yellow spotlights cutting through visible haze frame a moody concert stage. Center-frame, a male performer in a backward baseball cap, gray T-shirt, and patterned shorts sits behind a two-tiered keyboard rig, his hands moving fluidly across the keys while he leans into a microphone on a stand. The upper orange keybed bears illuminated white lettering reading \"DANIEL POWTER,\" and to the left, a full drum kit on a riser displays a circular \"D.P.\" logo on its bass drum, with the word \"Legacy\" scripted on a panel beneath it. Overhead metal trussing supports lighting fixtures that cast high-contrast beams across the scene, while a tall foreground mic stand slightly obscures the lower frame, keeping the camera completely stationary throughout the performance.\n\nAurally, the scene unfolds as a slow-tempo pop ballad driven by melancholic piano chords and sustained atmospheric synth pads, all drenched in a moderate digital reverb that evokes a large, reflective venue. A clear, emotive male voice with a soft North American accent begins, singing \"help me\" before continuing, \"’cause I don’t feel too strong.\" As the instrumental backing maintains a steady, mezzo-piano dynamic, the vocalist leans closer to the microphone and murmurs, \"What’s the reason I’m still holding on,\" his breathy phrasing and faint inhalations underscoring the intimate, vulnerable tension of the moment. The absence of percussion or crowd noise focuses all attention on the sparse arrangement and the performer’s expressive restraint, leaving the dramatic atmosphere suspended in quiet resonance.","video_1_relative_path":"videos/36456dbd15948871.mp4","video_2_relative_path":"videos/fbd05b631260390a.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/physics/physics_3/example.json::00000012","text_prompt":"A practical, instructional workshop scene opens under bright, even lighting, captured with a low-angle static lens focused on a light-colored wooden furniture frame resting on a plywood workbench. The wood displays visible grain and subtle distressed patches, set against a backdrop of neatly arranged tools and storage drawers. A craftsman in a pink short-sleeved shirt and striped pants enters from the left, holding a yellow sanding block wrapped in greenish-gray abrasive paper, and begins smoothing the lower horizontal rail with steady, rhythmic back-and-forth strokes. The audio is anchored by a crisp, mid-frequency scraping sound that perfectly syncs with the hand movements, layered over a low indoor workshop hum and a touch of natural reverberation.\n\nThe perspective shifts to a tight, static close-up on a curved wooden armrest as the same hands continue their work along the rounded top edge. Neutral lighting catches fine wood dust rising from the contact point, emphasizing the tactile shift in the surface texture. As the craftsman adjusts their grip to follow the curve, a calm, instructional female voice-over cuts through the ambient friction, stating, “Use sponges on the rounded areas and sand as though you are shining shoes.” Delivered in a clear, measured American English tone, the directive sits just above the persistent scraping foley without overpowering it. The camera holds steady on the meticulous hand movements, capturing the quiet, practical rhythm of the craft until the scene naturally concludes.","video_1_relative_path":"videos/fa0244daafa7bdfa.mp4","video_2_relative_path":"videos/05436937ade101f0.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/physics/physics_8/example.json::00000000","text_prompt":"Shot on a handheld camera with a first-person perspective, the scene opens on a light beige compact SUV parked on interlocking brick pavement under overcast daylight and a muted, natural palette. The lens pans smoothly from the side mirror toward the open passenger door, revealing a dark gray interior with matching fabric seats and a black bag resting on the cushion. Reflections of nearby green foliage ripple across the glass as the door swings wider, accompanied by a crisp metallic latch click and a soft thud as it meets the stop. Faint outdoor ambience and subtle fabric rustle underscore the motion before the camera crosses the threshold into the cabin.\n\nInside the vehicle, the perspective tilts downward to frame the footwell and pedals before rising to settle on the dashboard. Diffuse natural light washes over the steering wheel’s silver emblem, the analog instrument cluster with its white faces and red needles, and the center stack’s climate control knobs. The gear selector rests in neutral as a low-frequency cabin hum begins to fill the space. Suddenly, a sharp mechanical clunk echoes as the ignition key turns, immediately followed by a brief, high-pitched electronic whir that peaks and fades within a second, signaling the fuel pump priming. The camera holds steady, capturing the quiet precision of the moment.\n\nThe shot lingers on the dashboard as the ambient noise settles into a near-silent room tone. The green digital odometer glows steadily beneath the main gauges, displaying a reading of four thousand seven hundred and ten. No music or dialogue interrupts the scene; only the subtle, continuous low rumble of the enclosed cabin remains. The sequence closes on this static, observational frame, emphasizing the utilitarian realism of a mundane yet precise interaction with the vehicle.","video_1_relative_path":"videos/430e516a310a5710.mp4","video_2_relative_path":"videos/d77804b9eccb1928.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/podcast/podcast_1/example.json::00000008","text_prompt":"A cinematic medium close-up captures a woman standing center-frame against a deep blue, softly lit backdrop that remains uniformly dark and free of distracting textures. Frontal, even lighting sculpts her facial features without harsh shadows, while a static camera holds a steady, intimate gaze. She has long dark hair with straight bangs, wears a charcoal-grey blazer over a lighter top, and sports a small stud earring in her left ear. Her expression is earnest and reflective as she looks directly into the lens, her posture relaxed and her hands making only subtle, restrained gestures just below the frame. A calm, measured female voice begins, stating, \"We had this little bond.\"\n\nHer delivery remains clear and emotionally nuanced, carrying a slight natural room reverb that enhances the intimacy of the recording without any background music, ambient noise, or incidental foley. She pauses briefly before continuing, her eyebrows lifting slightly to emphasize her next words: \"For a minute, I felt like my existence as a person truly mattered.\" The audio cuts off abruptly mid-thought, leaving the confession hanging in the quiet space, while the visual composition remains completely still, directing full attention to her reflective presence and the unspoken weight of the interrupted sentence.","video_1_relative_path":"videos/624d7ce7c20ab44c.mp4","video_2_relative_path":"videos/7e0725b762e47fa1.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/podcast/podcast_2/example.json::00000040","text_prompt":"Cinematic medium shot, locked at eye level, bathed in bright even stage lighting that eliminates harsh shadows and emphasizes the crisp contrast between dark attire and a vivid blue backdrop. The scene unfolds as a single, uninterrupted take of a formal panel discussion, with the camera holding a stable, static frame throughout. On the left, a man in a black blazer over a black T-shirt with a faint white graphic sits upright in a modern white chair, his hands loosely clasped in his lap. His expression remains composed and focused, eyes directed slightly off-camera toward an unseen moderator, while his counterpart on the right sits perfectly still and silent, offering no visible reaction. The composition maintains a pristine, broadcast-quality visual field anchored by the stark blue-and-white color scheme, with no camera movement or cuts to distract from the subjects.\n\nThe sole audio focus is the left speaker’s voice, captured cleanly through a close microphone with a narrow dynamic range dominated by his speech and a faint, controlled room tone. He delivers a measured, analytical statement in calm, deliberate English, punctuated by natural pauses and mild fillers. Beginning mid-sentence, he completes the opening phrase with \"…to abundance for all.\" He then continues with a slight head tilt and subtle hand gestures, stating, \"If you say, you know, people often talk about uh solving global poverty or essentially how do we make give every person a sustainable path to prosperity.\" His delivery carries a neutral emotional valence with a rising intonation on the rhetorical question, accompanied only by soft inhalations before his phrases. The recording terminates abruptly mid-sentence, leaving no trailing ambience or fade-out, preserving the intellectual restraint and authoritative demeanor of the moment.","video_1_relative_path":"videos/6e25fa35d852591c.mp4","video_2_relative_path":"videos/8c10fb099d8747a0.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/voiceover/voiceover_10/example.json::00000093","text_prompt":"Open on a tight close-up in a dimly lit, overcast outdoor setting, where soft, diffused daylight filters through to cast muted greens and grays across the scene. A pair of male hands occupies the frame, the left adorned with a plain gold wedding band as it grips a matte-black, rectangular metal lighter. The right hand steadies the device while the thumb presses the flip-top lid upward, producing a crisp metallic click that cuts through a faint, underlying electronic hum. A calm male narrator in Standard Mandarin begins, stating \"刚想发作。\" The camera remains locked off but initiates a subtle push-in, keeping the focus sharp on the hands while the softly blurred background reveals pale vertical siding that suggests an exterior balcony ledge.\n\nThe left thumb flicks the flint wheel, but no flame ignites. A gruff, Cantonese-accented male voice cuts in with urgent force, overlapping the moment: \"古仔就打断施法。\" Before the tension can settle, another hand enters from the right edge, clad in a dark jacket with two silver snap buttons near the cuff. It seizes the lighter firmly between thumb and forefinger, halting further manipulation and causing the first person’s fingers to recoil slightly. The camera tilts down a few degrees to follow the interception in a single, unbroken take. The Cantonese speaker continues in a low, conspiratorial tone: \"你攞住個打火機俾人拔咗。\" The minimalist soundscape strips away all music, leaving only the ambient hum and the sharp, tactile clicks to heighten the realism and suspense of the contested object, whose failed ignition and sudden seizure foreshadow imminent conflict.","video_1_relative_path":"videos/81d1596358062794.mp4","video_2_relative_path":"videos/622ff7d6b94461d0.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/voiceover/voiceover_11/example.json::00000067","text_prompt":"Widescreen 16:9 cinematic framing, shallow depth of field, and soft frontal lighting from overhead fluorescents establish an intimate, tense atmosphere in a modest cafeteria. The background dissolves into a soft bokeh of blurred tables and distant patrons, keeping the visual focus locked on two East Asian men seated across from each other. On the left, an older gentleman in his late fifties wears a dark olive-green short-sleeved shirt and a small white earring in his left ear, his forehead lined with age. He leans forward, brows knitted and eyes narrowed, his medium-low Cantonese-accented voice cutting through the quiet room with controlled anger. A reproachful male voice states, \"You actually fool even the dead!\" Across the table, the second man remains perfectly still, head bowed in silent absorption, his presence anchoring the heavy atmosphere.\n\nThe camera holds its static position, capturing only the subtle shifts in the speaker’s expression as his delivery slows and hardens into stern admonition. The ambient hum of the eatery fades into the background, leaving only the weight of his words. A firm, didactic male voice continues: \"If you want others’ respect, you must first respect yourself.\" The muted earth tones of the setting—the olive shirt, the neutral walls, the soft even lighting—mirror the grounded, principled rebuke, leaving both men frozen in a moment of quiet tension as the final syllable hangs in the air.","video_1_relative_path":"videos/612b67d0754046f7.mp4","video_2_relative_path":"videos/0501885d8012b5d7.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/voiceover/voiceover_2/example.json::00000053","text_prompt":"A fixed, eye-level medium shot opens inside a cramped domestic kitchen, bathed in cool overhead fluorescent light that contrasts with the warm backlight spilling through a bright window. A stainless-steel sink and chrome faucet anchor the left foreground, while wooden cabinets and a black range hood line the walls above a white-tiled surface dotted with loosely taped photographs. Three figures occupy the tense space: on the left, a young woman with long dark hair in a pale, stained T-shirt faces away from the camera; in the center, an older woman wearing a red beret, red apron, and yellow top crouches near the counter, her head bowed and shoulders trembling; beside her, a slim young woman with short reddish-blonde hair in a black tank top and dark shorts watches with a stern, guarded expression. A calm, neutral male Mandarin voice-over begins, speaking evenly yet somberly: \"心脏病，蹲坐在地上无力地哭喊着。\" Beneath the narration, faint muffled sobbing seeps into the quiet audio bed, establishing a heavy, confined atmosphere.\n\nA young boy in a horizontally striped long-sleeve shirt and dark trousers steps into frame from the right, halting behind the blonde woman with his hands clasped and eyes fixed on the unfolding drama. The older woman remains hunched, her silent weeping continuing as the static camera holds the stage-like tableau, forcing focus onto the characters’ restrained bodily tension and the stark contrast between the cool lighting and the older woman’s vivid red attire. Suddenly, the blonde woman lifts her chin, opens her mouth wide, and projects a sharp, urgent cry, her arms rising slightly with palms inward as if urging escape. The Mandarin narration cuts out, replaced instantly by a high-pitched, strained female Japanese voice bursting forth with panicked desperation: \"誰とも出ていきなさい。\" The shout tapers into a ragged exhale, the older woman’s trembling softening into a breathy whimper, while all three standing figures freeze in place. The ambient silence amplifies every emotional fracture, leaving the tension unresolved as the frame holds its stark, backlit composition before fading to black.","video_1_relative_path":"videos/cacc1450e4ad3d53.mp4","video_2_relative_path":"videos/e7f3da9900f0e97f.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/voiceover/voiceover_3/example.json::00000056","text_prompt":"A quiet, introspective domestic drama unfolds in a dimly lit living room, captured in a static medium close-up with warm, low-key practical lighting that carves soft chiaroscuro shadows across muted earth tones. A young man with short dark hair and a small white adhesive bandage over his left eye sits slumped on a dark couch, his light-grey T-shirt bearing the red block letters “DUGOUT 1934 CAFE.” Bathed in side light that accentuates his weary posture, he gazes off-screen to his right while a calm, mid-low pitched male Mandarin voice-over begins, stating “再多说什么，只是道了声晚安。” The room remains hushed, the silence heavy with unspoken tension.\n\nA hard cut shifts the locked-off camera to chest height in the house’s hallway, where a wall sconce casts a muted yellow glow that pools around a second young man. Light-skinned with reddish-brown hair and wearing a plain grey T-shirt, he stands in profile near an arched doorway, his expression tired and resigned. He speaks in a quiet, soft English tone, “All right, I’m gonna go to bed,” before lowering his gaze. His shoulders drop as he takes a deep, audible inhale through his nose and releases a slow, weary exhale, the minimalist soundscape holding only the faint rustle of fabric and the weight of his breath. The camera remains completely still, framing the subdued intimacy of the night as the scene settles into quiet reflection.","video_1_relative_path":"videos/d9037146f0132249.mp4","video_2_relative_path":"videos/4ef1eb4ee7cf87e8.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/voiceover/voiceover_3/example.json::00000083","text_prompt":"A static medium close-up frames an older woman from mid-chest upward, positioned slightly left of center in a softly blurred domestic interior. Tall wooden-framed glass doors and bright green foliage fade into the background, while a cream-colored pleated floor-lampshade rests at the left edge. Warm daylight spills through the windows, casting a gentle, natural glow that leaves her face in soft shadow. She wears a light beige cardigan over a pale top, accented by a long double-strand pearl necklace, her short layered brown hair neatly styled. Her head is angled downward, eyes lowered, brows faintly knit as a calm, neutral male voice in Standard Mandarin speaks with studio clarity and no room ambience: “遗物。” The space is hushed and intimate, the stark absence of music or environmental noise focusing all attention on the quiet gravity of the moment.\n\nShe remains motionless except for a slight tightening of her lips and a barely perceptible intake of breath, her shoulders still as shallow depth of field isolates her against the muted interior palette. After a quiet pause, she lifts her gaze just enough to look forward before dropping it again, her eyes glistening and jaw quivering with restrained sorrow. In a slow, breathy North-American English voice, she whispers, “I gave this to Artie.” The delivery is weighted with sadness, every nuance foregrounded in the silent room, while the contrast between the bright exterior greens and the warm, homely tones of her cardigan and the wooden doors subtly underscores a quiet theme of memory, loss, and regret.","video_1_relative_path":"videos/ad7ebc00f7dc0e16.mp4","video_2_relative_path":"videos/3ad9fbf7bc6dae6f.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/voiceover/voiceover_4/example.json::00000054","text_prompt":"A tense thriller sequence opens in a spacious, upscale foyer, captured with a medium rear tracking lens that emphasizes strong backlighting and a palette of warm interior browns contrasting with cool daylight blues. Sunlight streams through tall arched French doors at the far end, casting bright patches across polished wood floors and dark furniture while silhouetting lush green foliage outside. A low, tense orchestral underscore begins immediately, with sustained cellos and basses holding a minor chord beneath a faint high-string tremolo. From behind, the camera follows a middle-aged Caucasian man in a charcoal business suit and white shirt as he pushes one leaf of the double door inward and steps across the threshold. The glossy grain of the wooden frame and curved glass panes reflect a vivid bouquet of red-and-yellow flowers on a nearby console table. Over the swelling strings, a calm, authoritative male voice speaking Mandarin begins, stating “照顾你的啊。” (“We’ll take good care of you.”), delivered with a measured, almost reassuring tone that sharply contrasts with the ominous score.\n\nAs the suited man advances into the room, the camera angle widens to reveal a patterned sofa against the right wall, heavy brown curtains, and a decorative urn near the doorway. Standing to face him is a late-middle-aged Caucasian man in a loose grey bathrobe, his back mostly turned, shoulders squared and posture rigid in silent tension. The lighting splits dramatically, flooding the entrance with cool daylight while the rest of the interior remains wrapped in softer shadows. The suited man’s expression tightens, brows knitting as he speaks in a low, deliberate English voice: “You know I thought you knew that all calls to the local station are routed through us.” The orchestral bed swells subtly, adding hovering higher strings that amplify the threat, while the bathrobed resident remains utterly still, reinforcing a stark power imbalance between the two.\n\nA sharp cut transitions to a dramatic close-up of the suited man’s face, where strong backlighting outlines his hair and jaw in a sharp rim of gold while leaving the rest of his features in chiaroscuro. His eyes narrow with a hint of contempt and warning as he finishes with firm, clipped authority: “This is federal land.” Each syllable carries extra weight, landing like a gavel strike over the sustained, unresolved harmonic tension of the score. The image lingers on his stern gaze as the music holds its menacing chord, cementing the atmosphere of a calculated law-enforcement confrontation where jurisdiction and surveillance are wielded as silent weapons.","video_1_relative_path":"videos/d759167363f2f2c2.mp4","video_2_relative_path":"videos/9601258fbef84a32.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/voiceover/voiceover_5/example.json::00000098","text_prompt":"Cinematic culinary short, macro and medium close-ups with shallow depth of field, warm amber-toned lighting that evokes traditional Chinese culinary aesthetics. The scene opens in a softly lit kitchen dominated by stacked bamboo steamers. An extreme close-up holds steady on three round, pleated steamed buns resting on parchment paper inside a bamboo basket, the camera static to let the viewer linger on the dough’s texture and the gentle play of light across its surface. A pair of hands briefly enters from above, fingers hovering as if to inspect the buns, then withdraws without touching them. Throughout this opening, a delicate guzheng-like plucked-string melody plays at a low volume, layered with faint, airy synth pads that establish a calm, contemplative mood. The sonic space is filled only by the music and a barely audible, damped room tone.\n\nA hard cut transitions to a medium close-up of a single steamed bun centered on white parchment within a small brown earthenware bowl on a wooden counter, with blurred steamers receding into the background to reinforce depth. The camera remains still, guided only by subtle focus shifts. Another cut brings an extreme close-up of the woven bamboo lid, its intricate pattern and twisted rope handle catching warm highlights. The perspective then widens slightly to reveal a full stack of steamers bathed in golden light as steam begins to curl upward from the top tier. At this moment, a male narrator with a clear, mid-low register Mandarin voice enters, speaking deliberately and evenly: “蒸气的热力，将食材的精华融入汤中。” The music dips subtly in volume to accommodate his measured, informative tone, sustaining its meditative quality beneath the words.\n\nA hand reappears, lifting the steamer lid with a smooth upward motion that releases a visible puff of steam, momentarily clouding the lens before dissipating. The camera tracks the tactile interaction closely as the hand retrieves a now-glossy, plump bun and transfers it onto a clean white plate lined with fresh parchment. The movement is deliberate and unhurried, perfectly matching the pacing of the narration and the score. As the speech concludes, the music swells back to its original presence before gently trailing off into silence. The final frames hold on the plated bun, glistening under the warm lights, closing the sequence with a serene, culturally evocative stillness.","video_1_relative_path":"videos/9b01bd3a711e8689.mp4","video_2_relative_path":"videos/082b062027cee72b.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/voiceover/voiceover_7/example.json::00000058","text_prompt":"Cinematic food documentary, macro lens with extremely shallow depth of field, natural backlight against a pale overcast sky casting cool bluish mist and soft rim highlights. The scene opens on a dark woven bamboo tray brimming with wild mushrooms, their dark brown-grey caps deeply fissured and ringed by pale cracked margins. The foreground melts into a soft blur while a misty mountain silhouette lingers in the distance. A gentle breeze stirs the air, accompanied by a barely audible rustle beneath a soft, low-key orchestral bed of sustained strings and distant piano. A calm, baritone male narrator in Standard Mandarin begins, stating \"借助阳光和风，肥美的野生花菇慢慢散失水分，鲜美的味道一点点凝聚。\"\n\nThe camera glides forward in a slow, deliberate track, gradually pulling focus until the individual mushrooms snap into razor-sharp detail. Fine fibrous textures and tiny pores become visible as the lens lowers to a near-ground angle, running almost parallel to the tray’s surface. Sunlight filters through thin cloud cover, casting intermittent lens flares that streak across the frame and catch the glistening moisture clinging to two prominent, outward-arching caps. The string pad swells imperceptibly, adding emotional weight while remaining subordinate to the voice, while subtle high-register violins introduce a delicate shimmer. The background mountains dissolve into a soft grey blur, leaving the composition static and meditative.\n\nThe shot holds steady, emphasizing artisanal food preparation and the quiet patience of nature. Muted earth tones—dark browns, greys, and desaturated greens—dominate the palette, contrasted only by the cool highlights of the backlit mist. The ambient wind fades into silence as the orchestral underscore sustains a quiet, wistful chord, reinforcing a sense of rustic serenity and culinary reverence. The entire sequence unfolds with restrained dynamics and a contemplative pace, inviting the viewer to appreciate the slow transformation of natural ingredients into concentrated flavor.","video_1_relative_path":"videos/37beb9e9076f7d08.mp4","video_2_relative_path":"videos/7d57440c269f8ebe.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/voiceover/voiceover_8/example.json::00000068","text_prompt":"Cinematic prison thriller sequence, locked-off medium close-up, desaturated green and gray palette, harsh single-source overhead lighting carving deep shadows across a confined cell. Vertical metal bars slice across the foreground, separating the viewer from two men illuminated by the stark, directional light. On the left, a prisoner with short light-brown hair, wearing a dark blue uniform jacket over a white T-shirt, leans against the wall with his eyes half-closed, his slow breathing barely audible beneath a continuous, low-frequency electronic drone. Opposite him, a balding, muscular man in a sweat-stained white tank top sits rigidly upright, his unblinking stare locked through the bars. The silence is broken by the first prisoner, who lifts his gaze slightly and speaks in a low, raspy Mandarin tone laced with restrained fatigue and accusation: “The night watchmen were originally arranged by you.” His words hang in the cold air, met by an unblinking stare that underscores the silent confrontation. As the Mandarin fades, a deeper, gravelly male voice cuts through the minimalist soundscape, delivering a slow, resonant English phrase with ominous weight: “Word is… Banks.” The electronic underscore persists unchanged, the camera remaining utterly still as the tension coalesces around the implied threat, leaving the prisoners frozen in their confined standoff.","video_1_relative_path":"videos/b0796a6ffaebb0f3.mp4","video_2_relative_path":"videos/fe2908942e7f5daf.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/voiceover/voiceover_9/example.json::00000092","text_prompt":"Cinematic widescreen capture of a late-afternoon campus scene, shot on a smooth tracking lens at eye level. Two young male students walk side-by-side along a paved path bordered by a red-brick academic building on the left and leafy green trees casting dappled shadows on the right. The student on the left—slim, with short dark curls, wearing a black rib-knit sweater and a tan backpack—turns toward his companion and speaks in a clear, neutral Mandarin voice-over, stating, “他们说的奥斯汀大学在麻省。” Natural daylight bathes the scene in even illumination, with long late-afternoon shadows adding warmth to an earthy palette of brick reds, foliage greens, and neutral clothing tones. A gentle outdoor hush fills the ambient audio, keeping the focus tightly on the pair as a shallow depth of field softly blurs the background pedestrians.\n\nAs the camera continues its gentle tracking motion, the student on the right—a stockier young man with a dark beard, dressed in a grey hoodie over a light T-shirt and holding a half-eaten red apple—shifts his gaze from the path to his friend. He responds in relaxed American English, his tone casual and slightly amused with a mild upward inflection, saying, “I never really liked Massachusetts.” The dialogue ends, and both men continue walking forward; the bearded student chews thoughtfully on his apple, glancing down briefly before returning his eyes to the path ahead. The camera maintains its steady parallel movement through a single continuous take, preserving the quiet, realistic campus atmosphere as the scene concludes without additional speech or notable environmental sounds.","video_1_relative_path":"videos/0273a63f1495c4b3.mp4","video_2_relative_path":"videos/73ef31315902fc58.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/voiceover/voiceover_9/example.json::00000095","text_prompt":"Cinematic, dialogue-driven scene, tight close-up, muted greens and browns, soft diffused key lighting, and a low-frequency ambient hum. The clip opens on a middle-aged man in a white lab coat over a light-blue dress shirt and patterned tie, his receding dark hair and weary, concerned expression sharply framed against a softly out-of-focus background of greenish shelving. A calm male Mandarin voice begins, stating \"但是人家店老板也说了，这里并不收治人类病人。\" The camera executes a straight cut to a medium close-up of the man being addressed, who stands framed from mid-torso upward against a solid dark-green wall and a closed door. He wears a beige baseball cap with a small green emblem, a brown jacket, and a light mesh undershirt stained with dried blood across his chest. His eyes are wide and reddened, brows knitted in anxiety as he grips a large translucent plastic water jug near his torso. A deeper, accented English voice responds with slow incredulity: \"This is a medical clinic, isn’t it?\" The delivery is strained, underscored by the faint low-frequency room hum that fills the enclosed space without music or pronounced effects.\n\nThe shot returns to the first man in the lab coat, who listens intently with lips pressed before answering in a polite, matter-of-fact British accent: \"Well, of course it is, sir, but strictly for animals.\" The static camera holds on his subtle facial shifts and slight head movements, maintaining a classic shot-reverse-shot rhythm that focuses entirely on the conversational tension. The ambient hum remains constant as the soft lighting continues to isolate their expressions, leaving the multilingual exchange and the visible injuries to hint at a cross-cultural setting where human patients may be receiving treatment intended for veterinary care, deepening the thematic ambiguity of the facility.","video_1_relative_path":"videos/dff12443f07d25eb.mp4","video_2_relative_path":"videos/46f8053e997ae5c3.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_davinci/multitalker/multitalker_1/example.json::00000019","text_prompt":"A brightly lit, modern café interior unfolds in a locked-off medium two-shot at eye level, framed in 16:9 with a shallow depth of field that softly blurs teal-green vertical wall panels, a large circular mirror, and potted plants into the background. Even, diffused frontal lighting washes the scene in a polished, contemporary drama aesthetic, while warm highlights on the subjects’ skin tones harmonize with the cool backdrop. Dominating the left side of a small round white table sits a young woman with short dark-brown hair and a vivid red track jacket, her saturated color drawing immediate focus. Opposite her, a neatly groomed man in a black suit, white shirt, and dark tie sits with his hands loosely clasped, his posture composed and attentive. The low murmur of ambient café chatter and faint utensil clinks fills the space beneath the dialogue, keeping the soundscape grounded and realistic.\n\nThe woman leans forward slightly, her eyes fixed on him, brows knit in thoughtful concern. A calm, earnest female voice in Standard Mandarin begins, stating, \"But when he speaks, you can't read a single emotion from his face. Unless you've studied micro-expression analysis, you have no idea which words are true and which are false.\" She stresses her words with subtle eyebrow raises, brief eye closures, and a decisive hand gesture, her precise articulation conveying analytical frustration. The man listens in silence, his head angled toward her, eyes lowering briefly before meeting her gaze again. As her sentence concludes, a momentary hush settles over the exchange, leaving only the soft background ambience. He responds in a lower, quieter register, offering a slight nod and a restrained smile that signals quiet agreement: \"That's right.\" His minimal movement and understated demeanor suggest contemplation, framing the brief exchange as a focused discussion on reading deception, with the woman’s skeptical expertise met by his receptive acknowledgment.","video_1_relative_path":"videos/5ab0f5729a4f1cc8.mp4","video_2_relative_path":"videos/fa3c5b6c915bcb34.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_davinci/multitalker/multitalker_1/example.json::00000094","text_prompt":"A cinematic medium-wide locked-off shot, eye-level framing, captures a quiet retro-styled café interior bathed in even, neutral overhead lighting that casts no dramatic shadows. The color palette leans into crisp whites, warm wood tones, muted wall blues, and a monochrome aesthetic, creating a clean contemporary space with nostalgic undertones. A moderate depth of field keeps the foreground subjects sharp while softly blurring the background employee working at stainless-steel coffee dispensers. From slightly behind and to the left, a blonde woman in a pale short-sleeved collared shirt with a neat bun stands at the dark service counter. Across from her, a red-haired cashier in an identical white uniform looks down at a silver laptop and a white payment terminal. A faint low-frequency room hum and muted HVAC rumble fill the space as the customer sharply raises her eyebrows and asks, \"What?\" in a tone of incredulous surprise, simultaneously setting a small white plate holding a golden-brown pastry onto the counter with a soft ceramic clink.\n\nThe cashier lifts her gaze, eyes widening with mild surprise, and offers a soft, questioning \"Mm?\" before returning her attention to the transaction. Behind them, the dark-haired employee quietly turns a coffee dispenser knob, contributing only the faint metallic click to the ambient soundscape. After a brief pause, the customer exhales audibly, her voice carrying restrained frustration as she firmly states, \"I’d like a refund.\" She gestures lightly toward the pastry with her free hand before resting both palms flat on the countertop. The cashier’s expression shifts from surprise to polite, focused attention; she nods once and leans fractionally forward over the laptop, mouth closed, ready to address the request. The frame holds steady on the unresolved exchange, with the quiet café ambience and subtle background dishware taps underscoring the tension, leaving the outcome of the refund request hanging in the air.","video_1_relative_path":"videos/1d20bc9368ee15d6.mp4","video_2_relative_path":"videos/d958cfafa280506c.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_davinci/multitalker/multitalker_9/example.json::00000043","text_prompt":"Cinematic realism, static medium close-up, shallow depth of field, and utilitarian fluorescent lighting define the opening shot in a brightly lit wholesale supermarket where even white illumination washes over wide aisles and towering metal shelves stacked with boxed goods and plastic-wrapped bundles. In the foreground, a middle-aged woman with dark hair pulled into a neat bun stands framed from the mid-torso up, wearing a navy-blue short-sleeved scoop-neck top. Her brows are knitted and lips parted, her posture radiating a tense, admonishing energy as a firm, steady female Mandarin voice begins, stating “你可别回家求我。” A faint low-frequency hum from refrigeration units underlies the quiet moment, while the cool blue of her attire contrasts sharply with the blurred red-and-gold cartons behind her.\n\nA hard cut shifts the perspective further down the aisle to a younger woman shown initially in profile, her long dark hair tied in a high ponytail and her plain white T-shirt layered beneath a vivid red sleeveless vest. Pastel folded garments and receding product displays soften into the background as ambient store noise—distant chatter, rolling carts, and the constant HVAC hum—fills the space. She draws a sharp breath, her eyes glistening and mouth trembling before a strained, emotionally charged young female Mandarin voice continues, stating “我在外面再苦再累，也比在那个家里受委屈的强。” As she speaks, her pace quickens and her tone rises, the shallow focus keeping her isolated against the busy commercial backdrop while shoppers drift through the deep background. The flat, bright lighting maintains an unflinching everyday realism, leaving the emotional tension unresolved as the static frame holds on her defiant expression.","video_1_relative_path":"videos/0b4aabd6d4f85a85.mp4","video_2_relative_path":"videos/1da3f95695759710.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_davinci/multitalker/multitalker_9/example.json::00000076","text_prompt":"Cinematic scene, static over-the-shoulder medium shot inside a modest kitchen bathed in warm, diffused overhead light that minimizes harsh shadows and fosters an intimate domestic mood. Cream-colored cabinets, a pale countertop, and softly blurred household items fill the background, while the bald head and shoulder of a silent older man in glasses anchor the right edge of the frame, facing left toward a younger man seated at the table. The younger man, sporting a grey-and-yellow striped beanie, a black zip-up jacket over a white shirt with colorful elbow patches, and short stubble, leans forward with a furrowed brow and tense jaw. In a low, clipped voice, he utters, “Pseudo.” The older man remains perfectly still and silent, his passive posture conveying quiet authority. The younger man’s lips tighten as he drops his tone to a resigned, almost muttered reply, “No pseudo,” exhaling audibly through his nose in a faint puff of air. His shoulders relax a fraction, signaling reluctant agreement, while the subtle rustle of clothing and a hushed ambient room tone fill the brief silence.\n\nA beat of quiet passes before the younger man’s expression softens, suspicion melting into cautious approval as his eyebrows lift and a tentative smile forms. He raises both hands in a small, open gesture of realization and says with growing enthusiasm, “So you do have a plan.” His face soon blossoms into open delight; leaning farther across the table with a wide grin, he exclaims brightly, “Yeah, Mr. White!” delivering the words with playful reverence. The older man finally turns his head slightly more toward the speaker, though he remains entirely silent. Maintaining his jubilant energy, the younger man punctuates his excitement with a triumphant flourish, tapping the tabletop lightly with one finger as he declares, “Yes, science!” His eyes gleam and his shoulders rise in celebration, ending the scene on his animated smile while the older man watches quietly, before cutting to black.","video_1_relative_path":"videos/147627e9d78c0045.mp4","video_2_relative_path":"videos/0e8605fb7c9fe7f5.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_davinci/multitalker/multitalker_9/example.json::00000079","text_prompt":"Cinematic sitcom comedy, fixed 16:9 medium shot, even warm lighting, and a saturated pink-and-red palette establish an intimate, stylized lounge setting. The scene opens on a young East Asian man standing at the left edge of the frame beside a small red-topped table, wearing a black T-shirt emblazoned with “BE ELVIS” and a cartoon Mickey Mouse graphic. He casually lifts a large roasted pork knuckle toward his mouth while speaking in a light, teasing Standard Mandarin tone, stating “悠悠，关谷是个日本人。” (Yōuyōu, Guān is Japanese.) The table between them holds two woven baskets of golden fries, a tall glass of orange-red cocktail with a yellow straw, and a frosted bottle labeled “BEER.” Behind him, deep red curtains and a wall sconce frame the cozy set, while a faint red and blue neon “BAR” sign glows on the rear wall and a couple chats quietly at a distant table. A low, continuous murmur of patron chatter fills the background, keeping the focus tightly on the foreground interaction.\n\nWithout shifting the camera, the man lowers the meat slightly, using it to gesture for emphasis as he continues his playful explanation. He maintains the same advisory yet amused tone, adding “呆板是关谷的特质。” (Being rigid is Guān’s defining trait.) Opposite him, a young East Asian woman with shoulder-length brown hair and bangs wears a sleeveless mint-green top. She holds a fork but pauses mid-bite, watching him with a mildly exasperated, skeptical expression. The ambient restaurant noise persists softly, underscoring the quiet tension of her reaction. As he finishes his point, the man gives a single nod, still holding the meat near his face as if sealing his argument. Concluding with a friendly admonition and a slight chuckle, he remarks “你就别跟他怄气了。” (So don't waste your breath getting angry with him.) The woman’s lips press together into a half-smile of resignation, and a patron in a maroon shirt drifts past in the blurred background. The fixed shot holds on this conversational beat, leaving the moment hanging in the warm, stylized atmosphere without cuts or additional audio cues.","video_1_relative_path":"videos/1481afbd2da999c2.mp4","video_2_relative_path":"videos/091af3abc59c780e.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_davinci/voiceover/voiceover_1/example.json::00000038","text_prompt":"A handheld documentary-style shot captures a tense daytime street scene, bathed in natural daylight and framed by mid-rise buildings and leafy trees. Two white police sedans marked “公安” and “POLICE” sit parked at the curb with their red-and-blue light bars inactive. The camera tracks a loose medium shot of two men in the foreground: a dark-haired man in a black suit jacket and white shirt, his face flushed and strained, and a bald man in glasses wearing a pale short-sleeved polo. The suited man waves both hands defensively toward an unseen lens, shouting in a loud, breathy Mandarin voice: \"不要拍我，不要拍我！\" (\"Don't film me, don't film me!\"). The bald man steadies him with a firm hand on his arm, his tone calm but authoritative as he replies in Mandarin: \"不不，你介绍一下。\" (\"No, no, explain yourself.\").\n\nAs the camera jitters slightly and pans left to follow the pair, uniformed officers in dark tactical vests labeled “警察 POLICE” step from the vehicles and fan out across the street, their presence adding to the quiet tension. The suited man stumbles forward, half-turning his body away from the lens while his voice cracks with panic: \"哎哎，我我实在应付不来，求求你别拍了！\" (\"Hey, hey, I can't handle this, please stop filming!\"). The bald man grips his upper arms more firmly, guiding him toward the open rear door of the lead sedan, its license plate “苏D·Q9328” visible beneath the trunk. With measured urgency, the bald man insists in Mandarin: \"你介绍一下情况。\" (\"Explain the situation.\"). The scene holds amid the faint outdoor hush and distant traffic rumble, capturing the suited man’s half-resisted entry into the vehicle while the handheld framing maintains a raw, immediate atmosphere.","video_1_relative_path":"videos/ae628038a0adec41.mp4","video_2_relative_path":"videos/17c95fc1db143a6e.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/instruments/instruments_1/example.json::00000050","text_prompt":"A fixed, eye-level medium shot captures a seated accordionist in a softly lit indoor studio, their torso and lap framed against a calm backdrop of stacked books, a white plush toy, a blue box, and a mesh bag. Natural daylight filters through sheer curtains patterned with pale blue leaves, casting an even, cool illumination across the scene. The performer, dressed in a black long-sleeved top and trousers, holds a black accordion bearing the vertical brand markings “SHU” and “HENG” on its front panel, while a tablet rests quietly on the desk to their right. As the scene begins, a bright, reedy accordion tone fills the frame, driven by a brisk, steady tempo around one hundred sixty to one hundred seventy beats per minute. The right hand launches into rapid, precise scalar runs across the white-and-black piano keys, while the left hand pumps the bellows with smooth, continuous motion, maintaining constant air pressure. The audio is captured in a clean, close-mic style with negligible room reverberation, allowing every crisp note attack and faint mechanical rustle to ring forward without distraction.\n\nWithout pause, the musical phrase evolves into a more ornamented descent and ascent, the performer’s shoulders remaining relaxed yet engaged as bellows expansion subtly swells the volume. The right hand executes trill-like flicks and quick upward bursts, while the left hand supplies block-chord accompaniment that reinforces a lively, dance-like major tonality. As the passage shifts into a syncopated motif, staccato single notes interweave with brief sustained chords, the bellows opening wider for louder peaks and contracting gently for softer accents. The melody climbs toward its highest register before resolving downward, the performer’s fingers striking with virtuosic independence and exact timing. As the final cadence lands on a firm, resonant tonic chord, the right hand plays a closing descending figure while the left releases the bass buttons. The fixed camera holds its static framing throughout, preserving the cool lighting and quiet practice-room atmosphere as the performer’s fingers lift cleanly from the keys and the bellows settle into a neutral position, concluding the unbroken, technically polished excerpt.","video_1_relative_path":"videos/6bcdb36703ae71c4.mp4","video_2_relative_path":"videos/286eac5adcae0606.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/movie/movie_1/example.json::00000019","text_prompt":"A cinematic maritime thriller establishing shot opens in absolute darkness, immediately pierced by a low-frequency, resonant drone that establishes a deep, ominous tension. The sound is sustained and devoid of melody, relying on its sheer weight and texture to pull the viewer into a state of quiet anticipation. After a brief moment, the black cuts abruptly to a wide, static vista of a restless ocean under a partly cloudy sky. Shot on a neutral lens with a cool blue-green color grade and diffused daylight, the water is choppy with small whitecaps catching the overcast light. Four yellow offshore oil rigs stand sentinel on the horizon—one substantial platform to the left, two smaller structures clustered in the center distance, and a solitary rig isolated far to the right. The camera holds perfectly still, emphasizing the scale and isolation of the industrial structures against the natural seascape.\n\nAs the seascape settles into view, the soundscape gradually thickens. A thin, glassy high-pitched shimmer weaves into the foundational drone, adding an ethereal layer to the atmosphere. Mid-range synthetic pads soon swell gently beneath, enriching the harmonic bed without introducing rhythm or melody, while a subtle broadband hiss resembling distant wind or moving air permeates the mix. The audio remains dry and closely focused, with a narrow dynamic range that sustains a moderate-to-loud presence throughout. Together, the unblinking camera, the stark juxtaposition of machinery and ocean, and the evolving electronic textures craft a mood of suspenseful anticipation, perfectly suited for a narrative where tone precedes action.","video_1_relative_path":"videos/68bbb4ee1ded25b6.mp4","video_2_relative_path":"videos/d4e0f5cdc8a785d6.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/movie/movie_5/example.json::00000063","text_prompt":"Cinematic wide-angle shot locked in deep space, rendered with a palette of star-filled blacks, swirling blues, and vivid terrestrial greens, lit by a single upper-left light source that casts sharp shadows and catches the atmospheric rims of two celestial bodies. On the left, a massive gas giant dominates the frame with its curved limb, displaying slow-swirling bands of blue, white, and faint violet. To its center-right floats a smaller Earth-like world, detailed with distinct green continents, deep blue oceans, and drifting white cloud cover. The camera remains completely static throughout, allowing only the subtle, natural rotation of the planets to animate the scene, evoking a profound sense of cosmic scale and isolation.\n\nOver this motionless tableau, a continuous non-diegetic ambient score establishes an ominous, dark sci-fi atmosphere. A low-frequency synthesized sub-bass drone anchors the center of the mix, while sparse, high-pitched sustained string pads shimmer gently in a wide stereo spread, drenched in generous reverb to emphasize the vast emptiness. The music is entirely arrhythmic and melody-less, built on slowly shifting minor-mode chords that start at a quiet, pianissimo level and gradually swell in volume and harmonic density. The tension builds steadily without ever introducing a beat or rhythm, finally cutting off cleanly mid-sustain as the visual holds, leaving only the echoing silence of the void.","video_1_relative_path":"videos/8b318b577020a19f.mp4","video_2_relative_path":"videos/c5c99879f0ef7b54.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_10/example.json::00000015","text_prompt":"Cinematic realism, shot on a 35mm lens, opens in a dimly lit, stone-arched passageway in historic Paris, where warm artificial light carves deep shadows across the scene. A medium shot frames a man in a dark suit jacket and white shirt standing face-to-face with a woman in a light beige blazer and dark top, her hair pulled back in a ponytail. She speaks with earnest, slightly exasperated intensity, raising both hands in emphatic gestures. A calm, earnest female English voice begins, stating, “Okay, I know your book is selling, which is great, I’m very happy for you. But let me break the news to you: the world is a mess right now.” As she speaks, the man turns away and begins walking out of the archway, his soft footfalls echoing on the stone against a backdrop of low, enclosed-space hum and faint distant chatter. The camera remains static, holding the tension as he exits toward the daylight beyond.\n\nA hard cut shifts to an exterior wide shot across the street, bathed in softer natural daylight that reveals the full context of Rue Bourgogne. The man strides briskly along the sidewalk away from the camera while the woman steps onto the pavement, turning to follow him with an open-handed, pleading gesture. A second man in a grey long-sleeve shirt and olive pants crosses the street perpendicularly behind them, passing storefronts with a closed grey roller shutter marked “SOLDES ÉTÉ,” large display windows glowing with golden decorative objects, and a green street plaque reading “RUE BOURGOGNE” beside a vertical “No Entry” sign. Her voice continues, slightly strained, as she adds, “From a Western point of view, things are actually getting better.” The soundscape opens into a broader stereo field of diffuse traffic rumble, intermittent tire hiss, and the subtle rustle of clothing, grounding the moment in raw, unadorned realism. No music underscores the scene, leaving the emotional tension unresolved as the clip fades on her half-turned silhouette against the quiet Parisian street.","video_1_relative_path":"videos/104509b054d07395.mp4","video_2_relative_path":"videos/1955686ed6a8afaa.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_12/example.json::00000040","text_prompt":"Set in a covered stone corridor of a traditional Chinese residence, the scene opens in a static medium close-up that frames two figures symmetrically against a softly blurred courtyard. Diffused, even lighting washes the space, casting no harsh shadows and highlighting the deep maroons, blacks, and subtle gold embroidery of their aristocratic robes. An elderly woman with silver-gray hair arranged in an ornate up-do stands directly behind a middle-aged man whose back is initially turned to the camera. Wearing long jade earrings that sway gently, she wraps her arms around his shoulders in a supportive embrace and leans forward. A mature, steady female Mandarin voice speaks with quiet reassurance, stating “Steady now.” Faint birdsong drifts from the open courtyard, mingling with a continuous, low-frequency ambient drone that underpins the contemplative mood.\n\nThe woman withdraws her arms but remains close, resting her hands lightly on his upper back as their eyes meet. Her expression softens into quiet pride and affection, while the man slowly lifts his face toward her, a modest smile breaking across his features as his eyes glisten with gratitude. Dressed in a dark brocade robe over a black inner garment and adorned with a small black-and-gold topknot ornament, he speaks in a respectful, slightly fatigued tone, his voice carrying the weight of filial deference: “Without your guidance, Matriarch, I could not have stood here today.” Subtle rustles of fabric accompany his movements as he finishes the sentence, leaving a brief, resonant silence filled only by the drone and distant natural ambience. The shallow depth of field keeps their faces sharply focused against the dark wooden pillars and potted greenery, holding on their tender, unspoken connection as the scene fades into contemplative stillness.","video_1_relative_path":"videos/e15ee874c7cd7bf6.mp4","video_2_relative_path":"videos/b491d39092a03017.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_12/example.json::00000091","text_prompt":"The scene opens on a static, medium-wide shot of a covered front porch at dusk, bathed in the soft amber glow of warm tungsten-style exterior lighting that casts gentle shadows across beige stucco walls, two thick white columns, and a stone-tiled floor. To the left, a decorative cluster of yellow, maroon, teal, and dark green balloons hints at a recently interrupted celebration, contrasting sharply with the somber body language of the two figures centered between the columns. A man in a dark navy double-breasted suit with gold buttons, a pale shirt, and a patterned tie stands with his hands in his pockets, shoulders slightly slumped and gaze fixed downward. Beside him, a woman in a shimmering royal-blue satin dress that falls mid-calf, paired with a sheer lace bolero, matching heels, and a small beaded clutch, faces him with wide eyes, raised brows, and a parted mouth. A clear, standard American female voice, initially breathy and incredulous, begins, stating \"I can’t believe it.\" After a brief pause filled only by faint room ambience, the man finally lifts his eyes to meet hers, his expression tense yet composed. The camera remains locked off in a balanced 16:9 widescreen composition with a moderate depth of field that keeps both subjects and the immediate background sharply in focus. The woman’s posture stays upright as she gestures slightly with her free hand, her steady voice edged with controlled frustration: \"Okay, we were talking.\" The man responds by inclining his head lower, briefly closing his eyes before letting out a short, self-conscious chuckle that conveys nervous amusement. As he looks back up, his shoulders relax fractionally, signaling a mix of embarrassment and resignation. The warm, even lighting continues to highlight the texture of her dress and the subtle emotional distance between them, leaving the scene suspended in a quiet, confrontational stillness.","video_1_relative_path":"videos/5785004afbc80da6.mp4","video_2_relative_path":"videos/c33cc17f726f054d.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_2/example.json::00000000","text_prompt":"A cinematic medium-wide locked-off shot, eye-level perspective, bathed in even natural daylight filtering through a large glass window that frames leafless trees and distant high-rise apartments against a muted urban backdrop. The scene unfolds at a light-wood service counter in a brightly lit office, where a middle-aged man in a dark green quilted jacket leans forward with lively, persuasive energy. Across from him, a young woman sits in a black mesh office chair, wrapped in a navy-and-white plaid blanket, her attention fixed on a small white packet held in both hands. The counter between them holds a clear water bottle with a red label, a yellow-orange juice bottle, a smaller bottle with a red cap, a whimsical green frog ornament, and a computer monitor displaying a spreadsheet, while a vase of pink-purple flowers rests on a shelf behind her. On the wall nearby, a poster advertises a rose-petal bath service and a panel bears traditional welfare characters, grounding the space in an everyday institutional setting. The middle-aged man speaks with casual insistence, his mid-range Mandarin voice carrying a slight urgency as he says, \"Let's go, let's go eat.\" The young woman lifts her gaze, a faint smile touching her lips before she tilts her head back and waves her free hand in a gentle, dismissive gesture. Her soft, polite Mandarin voice answers with mild reluctance, \"Sigh, forget it, you guys go ahead.\" She keeps her eyes downcast, lips pressed together in a thoughtful pause, clearly content to stay. The man straightens up, eyebrows raised, and repeats his invitation with a friendly but firmer tone, emphasizing that their ride is imminent. \"The car is arriving right now,\" he says, his voice rising slightly in emphasis. The camera remains completely still, maintaining the medium-wide framing that captures both characters and the quiet, informal atmosphere. The ambience stays hushed, with only their dialogue cutting through the stillness, underscoring the lightly humorous, everyday workplace interaction as the clip holds on the woman’s quiet refusal and the man’s persistent encouragement.","video_1_relative_path":"videos/38c68de1024ccdc7.mp4","video_2_relative_path":"videos/a6b4f6c41b8c3dd9.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_3/example.json::00000013","text_prompt":"A fixed wide shot captures a traditional Japanese dojo bathed in soft, even daylight filtering through high windows with horizontal blinds. The space features polished grey tatami mats bordered by thin red lines, light oak wainscoting, and a pale upper wall. A green chalkboard sits beneath a wooden plaque bearing the calligraphy “柔能制剛,” while a larger plaque reading “力善用自他皆益” hangs to the left beside a rack of bamboo shinai. Five young people sit in a loose semicircle on the mats. On the far left, an energetic youth with spiky black hair wears a black gakuran uniform and white socks. Beside him, a blond youth in a matching black uniform and bright red socks reclines on one elbow, right leg extended, left knee bent. Facing them are two youths in white gi tops and black hakama pants, one with short dark hair and the other with shoulder-length dark hair, alongside a fifth youth in a light shirt with gold embroidery, a patterned scarf, and dark trousers. All maintain respectful seated postures as the scene unfolds in a single, unbroken take with constant lighting and minimal shadows.\n\nA quiet exchange begins, the clean room tone carrying slight reverberation across the hard surfaces. A calm, polite male voice begins, stating “あ、やめておきます。” A brighter, teasing male voice leans forward slightly, replying, “やめます。やめます？” The first speaker’s expression shifts to mild puzzlement, his tone dropping into a hesitant question, “やめますの？やめない？え？え？何？” His eyebrows furrow, and he glances around the circle as his companions react. The spiky-haired youth in black leans in, eyes widening with surprise, while the blond youth grins and props himself up on both forearms, fully engaged. The first speaker’s volume lowers into a soft, resigned murmur, “だめ…そうか…” The shoulder-length-haired youth watches silently with hands folded, and the embroidered-shirt youth observes the banter with a faint smile. The camera remains completely still, focusing entirely on the micro-expressions and light-hearted interpersonal chemistry, concluding with the group frozen in mid-conversation before fading out.","video_1_relative_path":"videos/0b0c57661ad6481c.mp4","video_2_relative_path":"videos/eef7b7e34c9e1c52.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_9/example.json::00000070","text_prompt":"Cinematic memory piece, rendered in a 2.35:1 widescreen frame with a 50mm equivalent lens. The scene opens in a dim, softly lit outdoor setting at dusk, shot from just behind the man’s left shoulder so he occupies the left third of the image while the woman faces him from the right. Both are sharply focused, their faces illuminated by a balanced mix of warm practical lantern glow and cool ambient twilight, while everything beyond their shoulders dissolves into a creamy, impressionistic blur. A faint wash of evening ambience—distant murmurs, a light breeze, and the occasional metallic clink—sits low in the mix. A calm, reflective female voice with a General American accent begins, stating “So across the street from my house, there was this little library that had an old movies section.” The man listens silently, his face still and attentive, eyes steady on her with his head slightly tilted.\n\nAs she speaks, blurred figures drift through the background, suggesting a gently bustling fairground or festival. A person in a straw hat stands beside a brown horse near a barn-like structure, while another figure pushes a cart beneath a yellow canopy. The shallow depth of field keeps this activity indistinct, turning it into soft color and motion that enhances the dreamy, memory-like atmosphere. The woman pauses briefly, inhales, then resumes with a gentle, searching tone, adding “And so she… she took me there, and we spent an entire day together.” The clip lingers on her face for a moment of quiet reflection, the unspoken weight of the memory hanging in the cool dusk air, before the picture gently fades to black.","video_1_relative_path":"videos/608299208f02d18d.mp4","video_2_relative_path":"videos/f0ebae062f69c91d.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/music/music_3/example.json::00000012","text_prompt":"In the style of an intimate indie-folk performance, a static medium close-up captures a young man seated in a softly lit home studio, bathed in a warm key light from the right that sculpts gentle shadows across his face and a light-colored acoustic guitar. He wears a black short-sleeved polo and a thin silver chain, his wavy dark brown hair falling over his forehead as he leans slightly forward, eyes often closed or fixed on the fretboard in quiet concentration. Behind him, a neutral white wall, a closed door, and a low cabinet frame the intimate space, while a large-diaphragm condenser microphone on a shock mount with a black pop filter sits just to his left. The camera remains completely still, holding a steady, centered frame that emphasizes the raw, personal nature of the performance.\n\nSonically, the scene unfolds as a slow-tempo acoustic ballad driven by a clean, mellow guitar at a gentle sixty-eight beats per minute, set in a minor key that evokes a melancholic stillness. A clear, earnest male vocal in General American English begins, singing \"...and never closing the door.\" He continues, \"...Hearts are never broken by the rain,\" and \"...And time’s forever frozen still,\" his lips shaping each syllable in perfect sync with the rhythmic strumming. As the phrase concludes, his right hand lifts slightly after a chord change, and the vocal tapers into \"...So you can keep the memories close,\" before the audio cuts abruptly, leaving a brief, resonant silence that underscores the unpolished, heartfelt intimacy of the moment.","video_1_relative_path":"videos/70a2d5f1047924ce.mp4","video_2_relative_path":"videos/f8a4aae0db9054e5.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/physics/physics_1/example.json::00000018","text_prompt":"A cinematic close-up framed in warm, even lighting over a polished reddish-brown wooden surface captures two hands interacting with small objects. The camera maintains a steady overhead perspective with subtle handheld micro-movements, initially partially obscured by a passing hand before pulling back to reveal a black-and-gold toy weapon resting on the wood. The toy features gold accents, a red button, and a cylindrical golden barrel, while a smaller blue-and-black component sits nearby. A male voice with a calm, conversational American accent begins speaking directly to the viewer, his tone relaxed and explanatory. “And the essential reason I see that is… is because in Japan, the plates for the exclusive release…” As he speaks, the left hand picks up the larger toy, rotating it slowly to catch the light and expose its mechanical details, while the right hand lifts and sets down the secondary piece. The audio landscape is intimate and dry, punctuated by realistic foley sounds: sharp plastic clicks as the first toy settles, light scraping friction during the lift, a muted thud upon repositioning, and subtle creaks from finger pressure on the casing. Beneath the tactile manipulation and steady narration, a faint low-frequency hum from indoor electronics fills the quiet room, grounding the scene in a casual, domestic atmosphere focused entirely on the hands-on demonstration.","video_1_relative_path":"videos/e1bc6b2a6f26e65e.mp4","video_2_relative_path":"videos/2b231728aacc54f6.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/physics/physics_3/example.json::00000039","text_prompt":"A static medium shot captures a grassy clearing bordered by dense evergreen foliage under soft natural daylight. Center frame holds a vivid red model steam engine mounted on a wooden base, its tall black chimney, brass fittings, large spoked flywheel, and silver valve gear assembly sharply detailed. A man dressed in light blue denim overalls and a pale long-sleeved shirt with rolled-up cuffs stands to the right, his back mostly turned to the camera. He grips the flywheel with both hands and begins turning it clockwise in a steady, forceful rhythm, leaning his weight forward to drive the mechanism.\n\nThe scene is entirely devoid of ambient wind, distant traffic, or human vocalizations, focusing the listener’s attention solely on the machine. With each rotation, sharp, mid-to-high frequency metallic clicks and clanks ring out in precise synchronization with the wheel’s movement, moderately loud and intimate as if recorded from close range. As the man continues to crank, the mechanical rhythm intensifies, the clanking growing faster and more urgent. Suddenly, the internal mechanism catches; the flywheel breaks free from manual effort and transitions into a self-sustaining spin. The discrete clicks seamlessly accelerate into a continuous, high-pitched whirring that dominates the soundscape, marking the triumphant ignition of the vintage engine. The camera remains completely still throughout, holding a single unbroken take that captures the tactile physicality of the startup sequence. The composition stays locked on the operator and the machine, allowing the evolving acoustic journey from laborious cranking to the smooth, autonomous hum of a running engine to unfold without interruption, emphasizing the satisfying convergence of human effort and mechanical precision.","video_1_relative_path":"videos/7ff10556a5905b93.mp4","video_2_relative_path":"videos/de376383d1340201.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/physics/physics_5/example.json::00000033","text_prompt":"Cinematic documentary-style footage captured in a static, eye-level medium shot, bathed in warm ambient overhead lighting that casts soft shadows across beige walls. The frame centers on a young man with a short beard, dressed in a bright Carolina Panthers NFL jersey and a white baseball cap, seated comfortably in a personal den. Behind him, a large wooden door anchors the left side, while the right wall is densely decorated with sports memorabilia, including framed hockey posters with the bold text \"DEL CLARA,\" mounted deer head trophies with red accents, a blue license plate reading \"HVV-35,\" and several smaller framed photographs. He holds a dark-blue PlayStation console box steady on his lap and addresses the camera directly. A relaxed, conversational male voice in General American English begins, stating, \"Let’s start unboxing this.\" He lifts a black ballpoint pen in his right hand and carefully slices through the packing tape sealing the top seam, his movements precise and deliberate. As the pen draws across the cardboard, a crisp, high-frequency tearing sound cuts through the quiet room, perfectly synchronized with the action. He pauses briefly in concentration, the faint hum of electronics and soft rustling of packaging filling the space, then lowers the pen with a satisfied murmur, \"All right.\" The scene holds steady on the subject, the casual, anticipatory atmosphere underscored by clean, music-free audio that highlights every tactile detail of the unboxing process.","video_1_relative_path":"videos/99b5680c23f1d2b5.mp4","video_2_relative_path":"videos/c96c36a8068df52a.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/physics/physics_6/example.json::00000040","text_prompt":"Cinematic nocturnal ceremony unfolds in a low-angle close-up, where dramatic artificial uplighting and a rich tricolor palette stand out against a pitch-black sky. The camera is positioned near the base of a white flagpole, looking sharply upward as the Indian national flag begins its ascent. A single hand grips the hoisting rope at the lower right while a loud, rhythmic metallic clanking echoes through the scene, synchronized with the fabric’s initial rise. Multiple male voices shout urgent, energetic exclamations in Hindi, their overlapping tones conveying immediate effort and collective focus. As the flag climbs, it gradually unfurls to reveal the full vertical tricolor and the navy-blue Ashoka Chakra centered on the white band. The camera holds its fixed position but subtly tilts upward to track the movement, while faint silhouettes of foliage and a bright circular moon emerge in the upper sky.\n\nSmall sparks and embers drift across the frame from the lower left, adding a dynamic, pyrotechnic texture to the dark backdrop. The metallic clanking gradually fades as the crowd’s vocalizations swell into a unified wave of cheers, whistles, and rhythmic chanting, peaking in intensity as the flag reaches its highest point. Though still slightly wrinkled from the hoisting process, the banner flutters gently in the night breeze, fully illuminated against the nocturnal setting. The camera settles into a steady, elevated composition, allowing the vibrant colors of the flag to dominate the vertical frame. The scene closes on this moment of culmination, where the fading mechanical sounds give way entirely to sustained communal celebration, capturing an atmosphere of reverence, unity, and patriotic fervor without musical accompaniment.","video_1_relative_path":"videos/8da39a67645cb788.mp4","video_2_relative_path":"videos/9378c05170cd3326.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/physics/physics_7/example.json::00000012","text_prompt":"Cinematic urban documentary style, shot on a 35mm lens with natural daylight softened by the heavy shadow of a concrete overpass. The scene opens on a slightly elevated, static wide frame of a congested roadway where a black Mercedes sedan, a silver hatchback, a red compact car, and a distant double-decker bus sit motionless in both lanes. Centered in the frame, a white Peugeot police van with high-visibility blue-and-yellow checkered markings and bold POLICE lettering on its hood and doors begins to creep forward. Its roof-mounted blue emergency lights flash in a steady rhythm, casting intermittent cyan reflections across the asphalt and the surrounding metal bodies. As the van advances, the camera executes a subtle forward zoom and pans right to track its approach, tightening the composition from a medium-wide into a tight close-up. The van dominates the foreground, its driver visible as a silhouette through the windshield, while the side door briefly flashes a circular police crest decal before the vehicle sweeps past the lens with intensifying motion blur. Aurally, the entire soundscape is consumed by a relentless, synthetic two-tone siren that oscillates at a constant pitch and volume, echoing slightly off the hard concrete walls of the underpass, which are lined with faded commercial signage and a partially visible billboard. No discernible engine roar or tire squeal competes with the siren, which holds its piercing intensity until the van clears the frame, at which point the audio cuts off abruptly, leaving only the faint, hollow reverberation of the urban tunnel.","video_1_relative_path":"videos/7b6ba02f0962c284.mp4","video_2_relative_path":"videos/c37c670e0ef71462.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/podcast/podcast_1/example.json::00000007","text_prompt":"A cinematic medium close-up captures a man with short, dark curly hair, a neatly trimmed beard and mustache, and black-rimmed glasses, dressed in a light blue denim jacket layered over a pale yellow mandarin-collar shirt. He stands against an out-of-focus backdrop of deep blues and purples, illuminated by soft frontal lighting that cleanly separates him from the abstract background. The camera remains perfectly steady as his earnest expression shifts with subtle facial movements. A calm, neutral male voice begins, \"So the question started to work its way into my work life as well,\" delivered with precise lip-sync and natural, minimal breathing.\n\nA hard cut transitions to a wide shot, revealing the full auditorium environment. The speaker now appears smaller, positioned slightly left of center on a circular red rug, with a large three-dimensional red TED logo standing prominently to his right. Silhouetted audience heads fill the foreground, facing the stage under ambient illumination that complements the concentrated spotlight on him. He maintains a composed posture, hands loosely clasped at waist level, and adds a slight hand gesture as he continues without pause, stating, \"I did some research.\" The acoustic space carries a mild hall reverb, keeping the sonic texture clean and dry, entirely free of music, crowd noise, or mechanical distractions, which reinforces the grounded, contemplative mood of the presentation.","video_1_relative_path":"videos/6f2fcc39154325fc.mp4","video_2_relative_path":"videos/ff9a399ff647996d.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/podcast/podcast_1/example.json::00000040","text_prompt":"A satirical television news scene opens in a brightly lit studio, framed in a static medium shot with crisp, even lighting and a polished palette of navy blues, reddish-browns, and soft floral accents. A female anchor sits behind a desk, short brown hair styled with bangs, wearing a square-neck cap-sleeve dress while holding papers and a pen. She looks directly into the lens, her clear mid-range voice cutting through the dry, music-free audio: \"Dr. Steele has some new information.\" A hard cut shifts to an overcast outdoor press conference, captured in a steady medium shot beneath the glass doors of a modern building entrance. Dr. Steele stands center-frame in a white lab coat, her earnest expression and subtle hand gestures drawing attention as she addresses a cluster of microphones thrust toward her. To her left stands a young boy with curly dark hair in a blue-and-white plaid shirt, his posture still and neutral, while a man in a black leather jacket and green tie stands protectively to her right, occasionally raising a hand. The atmosphere is tense yet controlled, with no wind or crowd noise breaking the focus on her voice. She continues, her delivery steady and urgent: \"Moments ago, a search team rescued this young boy who came to the change of name office by himself and didn’t tell his parents because he had decided to leave his old life behind.\" The scene holds on the trio, the stark contrast between the floral studio and the gray, media-saturated street underscoring the narrative’s satirical edge.","video_1_relative_path":"videos/931fbeb7e0dbd0ce.mp4","video_2_relative_path":"videos/925b1d499866e91c.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/podcast/podcast_2/example.json::00000002","text_prompt":"Cinematic interview scene, captured in a static medium close-up with a 50mm lens, soft frontal key lighting, and a muted palette of grays, blues, and whites. The setting is a compact, acoustically treated radio studio where walls are lined with matte gray acoustic panels. A young man sits slightly left of center, wearing round gold-rimmed sunglasses, a loose blue denim jacket with brass buttons over a plain white T-shirt, and shoulder-length hair that darkens at the roots. He speaks with animated energy, punctuating his phrases with open-palmed hand gestures that rise and fall within the frame. A young male voice with a conversational American accent begins, stating, \"Not just about language. Music is universal. Yeah, you know, that’s what I feel.\" He nods once, maintaining steady eye contact with an off-camera interviewer, then lowers his hands for a brief pause before smiling faintly and tilting his head back.\n\nA hard cut shifts the focus to a second participant, now centered in the frame, sharing the same studio environment and lighting continuity. This slightly older man wears a black baseball cap with white cursive lettering, dark sunglasses, and a dark polo shirt, with a matching boom-mounted microphone hovering near his mouth. He listens with a relaxed yet attentive posture, briefly raising a hand to his chin before responding in a deeper, casual tone, \"For sure. I love that, I love that.\" The room tone remains quiet, underscored only by a faint electronic hum and the soft rustle of fabric as he shifts his weight. He leans slightly forward, his voice carrying a natural, unobtrusive inhalation as he continues, \"You gotta put me on to some of the old records you mentioned.\" The exchange stays intimate and unaccompanied, keeping the focus entirely on the clear, close-miked dialogue and the clean, professional atmosphere of the booth.","video_1_relative_path":"videos/b8e7ef297eb86bd0.mp4","video_2_relative_path":"videos/3f15b4f7e00ae341.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/podcast/podcast_2/example.json::00000045","text_prompt":"Cinematic medium shot, static camera, warm spotlight against a dark backdrop with abstract red and blue light beams, a single female presenter stands center-stage. She wears a black blazer over a green top, accented by a silver statement necklace and hoop earrings, holding a yellow-and-black presentation clicker in her right hand. The camera remains fixed, drawing focus to her engaged, professional demeanor as she begins speaking with a calm, academic tone. A soft breath intake precedes her clear, measured voice, which carries a slight upward inflection on proper nouns. She raises her left hand, fingers curled in emphasis, while her gaze shifts naturally between the unseen audience and her notes.\n\nA calm, academic female voice begins mid-sentence, stating \"…for example, Nalini Ambady, a researcher at Tufts University, shows that when people watch thirty-second soundless clips of a real physician interacting with a patient.\" She continues without pause, her eyebrows lifting subtly on key phrases as she lowers and then raises her left hand to punctuate her point. The audio remains pristine, dominated entirely by her voice with only a faint rustle of fabric as her arms move and a barely perceptible ambient reverb suggesting a large auditorium space. The clicker is tapped lightly against her palm but produces no audible sound. As she finishes the sentence, her mouth closes gently, her posture softens, and her hands lower toward waist level. The lighting holds steady, casting soft shadows behind her, while the abstract background lights remain fixed, leaving a clean, authoritative silence as the scene concludes.","video_1_relative_path":"videos/9612d4b2045ac948.mp4","video_2_relative_path":"videos/0aaf78cc6a5fcc00.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/podcast/podcast_2/example.json::00000057","text_prompt":"Cinematic stage presentation, medium front-facing shot gradually tightening to a close-up, bathed in a single dramatic spotlight against heavy, dark red curtains. A poised young East Asian man stands center-stage in a navy suit jacket, light blue pin-striped shirt, slim black tie, and dark trousers, a flesh-colored headset microphone tracing his right cheek. The lighting casts soft shadows across the drapery while leaving a subtle catch-light on his forehead and lapel, rendering his attire crisp against the near-black background. He begins with a calm, articulate American male voice, measured and clear, filling the acoustically resonant hall with a gentle natural reverberation. “And they accumulate more knowledge,” he states, raising both hands to chest height with palms facing inward in an open, explanatory gesture. The ambient room tone remains low, marked only by a faint HVAC hum and the soft rustle of his sleeves as he speaks.\n\nWithout breaking the static frame, he shifts his weight, pivoting his torso leftward before returning to center, his hands sweeping outward in symmetrical arcs before drawing together again. His brow lifts and eyes widen as his tone shifts to incredulous questioning, pitch rising on the final words. “So if anything, they should be getting smarter,” he continues, then pauses, asking, “How could they possibly be getting less intelligent?” The camera imperceptibly tightens into a close-up, focusing on his face and upper torso. He leans forward a fraction, tilts his head, and releases a brief, audible sigh before offering a half-smile and a light, self-deprecating murmur. “What am I talking about?” he asks, his hands lowering out of frame. The headset captures every nuanced breath and mouth sound without distortion. With renewed confidence, he nods once, eyes brightening, and his voice takes on a reassuring, optimistic inflection. “Well, I do hope to illustrate that to you today.” A slight pause follows, his shoulders relaxing as he glances down and to his right before meeting the lens again. His tempo slows, adopting a reflective, slightly vulnerable tone. “Before I turned fourteen, I was a kid that did not know what he wanted in life,” he begins, the spotlight keeping his features sharply lit while the red curtains dissolve into shadow. The ambient hum persists, the recording remains clean and intimate, and his final words trail off naturally into the quiet space, leaving a contemplative, anticipatory mood that draws the viewer fully into his forthcoming narrative.","video_1_relative_path":"videos/8067f59d77fae575.mp4","video_2_relative_path":"videos/d2c479f8d52f64ee.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/voiceover/voiceover_1/example.json::00000002","text_prompt":"A bleak, desaturated prison drama scene captured in cold green-gray tones under harsh overhead fluorescent lighting that casts sharp shadows across concrete floors and metal bars. The camera opens on a medium shot of a gaunt Caucasian prisoner with slicked-back dark hair, a thin goatee, and fresh red abrasions on his forehead and left cheek, wearing a plain white T-shirt that clings to his frame. Behind him, a loose semicircle of inmates in white tank tops and pale-blue uniforms mills quietly, their distant murmurs blending with the low electrical hum of the lights. A calm, neutral male Mandarin voice-over begins, stating, “He was the first to step forward, pointing at a Black man and declaring his challenge.” The camera executes a quick cut to a close-up profile of an older Caucasian guard in a dark short-sleeved uniform with epaulets and a silver star badge. His jaw is set, eyes narrowed as he watches the unfolding tension, with more inmates visible behind barred doors in the background.\n\nCutting back to a medium close-up, the injured prisoner lifts his chin defiantly, lips curling into a sneer. He tilts his head slightly toward a tall Black inmate standing just behind him, then thrusts his right index finger forward as he shouts in a rough, accented English voice, “Not that hot! You think that’s enough heat?” His delivery is loud, mocking, and edged with aggression. The surrounding men react visibly: one inmate in a blue uniform grins broadly and rests a hand on the Black prisoner’s shoulder, while another in a white sleeveless shirt smirks. The Black inmate himself remains stoic, shoulders squared but unmoving. The fluorescent glare catches the sweat on everyone’s skin, heightening the sense of stifling heat and raw confrontation. With no music to soften the moment, the scene lingers on the unresolved tension, the ambient crowd murmur and harsh lighting framing the standoff.","video_1_relative_path":"videos/7c55288dfb24a79b.mp4","video_2_relative_path":"videos/fad9865e590d45ab.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/voiceover/voiceover_1/example.json::00000026","text_prompt":"A cinematic documentary-style sequence opens on a modest Beijing rooftop garden bathed in bright late-morning sunlight, rendered in a palette of earthy browns and muted greens that evoke a crisp late-winter or early-spring atmosphere. The camera frames a man dressed entirely in black—long-sleeved shirt, trousers, and a flat cap—standing on a low stone border between narrow planting beds, with bare wooden trellises draped in dried vines, a white-walled shed, and distant grey apartment blocks forming the backdrop. A calm, reflective male narrator in standard Mandarin begins with a steady, mid-range documentary tone, stating “老北京人的种种爱好，被屋顶上的一样事物取代了。” as a faint breeze and distant city hum underscore the quiet scene. The shot tightens to a close-up of the gardener’s left hand carefully lowering a slender pale-green seedling into dark, crumbly soil, the soft scraping of earth and crisp sunlight casting sharp shadows that emphasize the season’s texture. An extreme close-up follows inside a light-blue enamel bowl, capturing a cascade of small, round, greenish-brown mottled seeds rattling against the metal before settling with a distinct pouring sound and a brief metallic clink. The camera pulls back to a medium shot as the man bends over the bed, gently pressing soil around newly sown rows with focused yet relaxed posture, accompanied only by the rustle of his clothing and the continuing urban ambience. A wider view reveals the full rooftop expanse as he straightens to survey his work, dry vines swaying faintly in the breeze, the atmosphere settling into quiet contemplation. The sequence lingers on this expansive composition as the narrator’s measured voice returns to mark the passage of time, uttering “五个月后。” while the minimalist sound design and patient visual pacing leave a sense of seasonal anticipation hanging in the crisp Beijing air.","video_1_relative_path":"videos/8e8a076831658d2b.mp4","video_2_relative_path":"videos/4507f4d38cd0eb7f.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/voiceover/voiceover_11/example.json::00000038","text_prompt":"The film opens in near-total darkness, where a tight, slightly tilted close-up reveals the right half of a young woman’s face as she sleeps. A cool, faint bluish-violet light grazes her cheek, nose bridge, and eyelids while the rest of the frame sinks into blackness, establishing an intimate, nocturnal mood. Her breathing is barely visible, and the camera remains almost motionless to heighten the stillness. Beneath this quiet visual, a deep, resonant male narrator in Standard Mandarin begins, stating \"二十多年风雨劳顿，之所以不觉得孤单，是因为他们彼此扶持。\" then continues in the same measured cadence, \"除了坚韧的丈夫，还有那位勤劳的妻子。\" A subdued orchestral bed of low strings sustaining long chords and a soft piano motif underpins his voice, creating a reflective, wistful atmosphere.\n\nA hard cut shifts to a low-angle view from inside a moving vehicle at night, the lens peering over a glossy hood or dashboard that mirrors scattered red and amber bokeh lights drifting past to imply forward motion along a lit roadway. The colour palette warms to reddish-orange reflections against the dark interior, contrasting with the earlier cool tones. Beside the driver’s seat, a middle-aged man sits in profile, wearing a dark jacket as the cabin is dimly washed with alternating blue and orange street-light glows that flicker across his features. His expression is neutral yet intent, eyes fixed ahead, embodying quiet determination. The orchestral score swells slightly, adding depth without overpowering the voice-over, while the deliberate absence of ambient or mechanical road noise keeps the focus entirely on the narration and music. The scene lingers on this ongoing journey, both literal and metaphorical, underscoring themes of perseverance, companionship, and shared endurance through the gentle, poetic cadence of the underscore.","video_1_relative_path":"videos/f06d40160c084dad.mp4","video_2_relative_path":"videos/bb9d3264d0c7fa85.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/voiceover/voiceover_2/example.json::00000024","text_prompt":"A cool, desaturated cinematic scene opens on a medium shot of an unfinished, open-air concrete structure, where rough pillars and exposed beams form a skeletal frame. Diffuse daylight filters through the gaps, casting soft shadows across the gray surfaces and establishing a contemplative, slightly somber mood. In the mid-ground, a woman with shoulder-length reddish-brown hair stands wearing a loose white button-down shirt over a pale top and a delicate gold necklace, her brow slightly furrowed and lips parted as if caught mid-thought. Beside her, a young girl with straight, light-blond hair in a dark long-sleeved top gazes ahead with a neutral expression. The camera holds steady before initiating a slow, almost imperceptible push-in. A calm male Mandarin voice-over begins, stating, \"Clearly this is the professor’s deliberate attempt to make things difficult.\" The woman’s gaze drops toward the child, her shoulders tensing minutely with quiet concern, as the narration continues, \"But unexpectedly, Mary only speaks at this moment.\"\n\nThe framing tightens fractionally on the pair before the woman finally utters, \"It was wrong,\" delivered softly yet firmly with a slight downward inflection that conveys reluctant admission. The scene cuts sharply to an extreme close-up of a weather-worn stone tablet set against a backdrop of green foliage. Natural daylight illuminates the deep relief of three raised, serif-style Chinese characters carved into the ancient rock, emphasizing the texture and craftsmanship of the stone. Throughout the sequence, the absence of music and ambient noise focuses attention entirely on the spoken words and subtle facial expressions, while the muted palette of grays, whites, and earthy greens visible through the distant trees reinforces the restrained, dramatic tension of the moment.","video_1_relative_path":"videos/275fb7741b8424f9.mp4","video_2_relative_path":"videos/326e031ec290d72c.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/voiceover/voiceover_4/example.json::00000060","text_prompt":"A tense, clandestine thriller sequence opens in a dim, bluish-green interior, captured in a tight close-up with a static camera and a desaturated palette of cool greens and greys. Low-key lighting from camera-left carves a stark chiaroscuro across the face of a middle-aged man with dark, slightly dishevelled hair, a short beard and moustache, and a pale collared shirt. His eyes are wide and fixed just off-camera to his right, brow furrowed, lips parting as though he is catching his breath after an urgent exchange. A calm, neutral male Mandarin voice-over begins, stating \"He believed it and handed over the map.\" The scene then cuts to a high-angle close-up of two hands gently smoothing a crumpled sheet of paper, revealing dense black-ink architectural sketches, cross-hatched walls, and angular outlines of rooms and corridors. Crisp paper rustling momentarily dominates the minimal ambient soundscape, while the low directional light highlights the texture of the page and the veins on the knuckles. The camera returns to the man’s face, his expression now hardened into open menace, eyes locked forward, jaw set, and brows raised. A low, deliberate American English voice from the man in frame, tense and measured, delivers the threat: \"If you try to screw me over again, I’ll kill you.\" The final word lands with deliberate weight as the frame holds on his unblinking stare, leaving the tension unresolved against the dark, indistinct wall. The sequence relies on static close-ups and a single insert shot to amplify the claustrophobic atmosphere and the underlying narrative of betrayal and a life-or-death warning.","video_1_relative_path":"videos/79077f540104db34.mp4","video_2_relative_path":"videos/8588dfa0f6d40c4f.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/voiceover/voiceover_4/example.json::00000087","text_prompt":"A tense, low-key cinematic scene opens in a cold, institutional room resembling a prison cell or interrogation space, shot in a medium close-up with a desaturated palette of muted greens and blues. A middle-aged man with greying hair, wire-rimmed glasses, and a neatly trimmed mustache sits behind vertical metal bars that dominate the foreground, creating a stark visual barrier. Dressed in a blue denim jacket over a white T-shirt, he cradles a small brown tabby cat with both hands, his head bowed and his expression heavy with weariness. The lighting is dim and cool, casting soft shadows across his face while catching the metallic sheen of the bars. A calm yet forceful male Mandarin voice begins, stating, \"You have no idea that’s impossible.\"\n\nA straight cut shifts to an extreme close-up of a second man, his face filling the frame with shallow depth of field. He has short dark hair, pale eyes, and pronounced facial lines etched by stress, his skin glistening slightly under the low-key, green-tinted lighting. A black tactical vest strap crosses his chest, and a grey handheld radio rests near his collarbone. His jaw is set, lips pressed tight, and his gaze is fixed just off-camera to the right, radiating intense concentration. The background dissolves into plain concrete blocks washed in shadow. The same Mandarin speaker continues without pause, his measured tone carrying a coercive edge: \"You’re forcing old DB to give up information.\" The camera holds locked on the man’s face, capturing subtle micro-movements—a tightening of the brow, a faint shift of the eyes—that betray mounting pressure. The voice drops slightly lower, pacing slows, and he seamlessly switches to English in a deep, deliberate tone: \"Before I leave this cell, if you don’t tell me who killed Bob, I’ll find out myself.\" The frame lingers on the unyielding tension, fading into silence as the cold key light from above-left and stark composition reinforce the psychological weight of the confrontation.","video_1_relative_path":"videos/07f8c922138d8830.mp4","video_2_relative_path":"videos/3e333154f2b1e7ab.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/voiceover/voiceover_7/example.json::00000084","text_prompt":"Cinematic interior scene, static low-angle medium shot, cool green and gold palette contrasted with intimate warm highlights. The frame establishes an ornate interior wall clad in deep green panels trimmed with intricate gold filigree. Centered high on the surface hangs a horizontal wooden plaque with a cream-colored face, bearing three large black calligraphic characters “愛別離” flanked by smaller vertical seal-script text and a red square seal on the right edge. Below it, two gilded frames hold dark, indistinct classical paintings, while a softly glowing table lamp at the left edge casts warm amber highlights that contrast with the otherwise dim environment. A calm male voice-over in Standard Mandarin begins in a measured, explanatory tone, stating “上面写的是人生八苦中的爱别离。” The scene holds without camera movement, the silence of the room punctuated only by the narration, emphasizing the weight of the philosophical concept etched into the wood.\n\nA hard cut shifts to a tight close-up of a shirtless East Asian man from mid-chest upward, positioned slightly right of center. His head is bowed, eyes cast downward, lips parted as if caught in a moment of quiet revelation. Warm light from the front-left illuminates his face and bare chest, where a thin dark cord necklace rests, while a brighter, flickering orange glow in the far-right background—suggesting fire or a distant lamp—casts soft, dancing shadows across his shoulders. The shallow depth of field blurs the surroundings into a hazy vignette. The narrator’s voice fades, and the man himself utters a single, subdued word, “雪儿,” delivered quietly with a breathy, sorrow-tinged quality. The atmosphere remains deeply hushed, devoid of music or ambient noise, allowing the intimate warmth of the lighting and the raw vulnerability of his expression to anchor the scene before the image holds briefly and concludes.","video_1_relative_path":"videos/eae16a008abe09f6.mp4","video_2_relative_path":"videos/03f9f2b748ad2d22.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/voiceover/voiceover_8/example.json::00000001","text_prompt":"Cinematic medium close-up in a dimly lit bathroom, rendered in cool, desaturated greens and muted whites to evoke a sterile, confined atmosphere. The walls are clad in pale green tiles surrounding a large mirror, and a soft, low-volume electronic drone establishes an ominous, suspenseful bed. A middle-aged Caucasian man with short dark hair styled upward and a trimmed goatee stands before the glass, wearing a plain white T-shirt with shaving cream on his chin and upper lip. His expression is tense and slightly anxious; his eyes widen and lips part as he speaks in Mandarin with a calm, resolute tone, “冰释前嫌。” Without a cut, the camera holds steady as he continues, “这件事就当翻篇了。” His steady cadence and slight downward inflection signal finality. The synth pad persists, unobtrusive yet foreboding, while the confined framing reinforces his introspective state.\n\nA hard cut transitions to a prison corridor or visitation area, shifting to a medium shot with a starkly different lighting design. Hard, directional light carves deep shadows, casting the man’s silhouette and the outline of a barred window onto a cinder-block wall to his right. He now wears a light-blue short-sleeved uniform shirt over a white long-sleeved undershirt, a silver cross pendant resting against his chest. Through the bars, tiered cell blocks and distant inmates in matching blue uniforms are faintly visible. With a pleading, fatigued expression, he extends his left hand toward an off-screen presence and says in English, “Take my hand.” His voice is soft, breathy, and imploring, emphasizing the word “hand” before he adds, “So we can put this behind us.” The delivery is earnest and conciliatory, trailing gently with a faint exhale. Throughout the sequence, the restrained electronic score continues at a consistent low level, devoid of diegetic noise, keeping the focus entirely on his plea for reconciliation amid the carceral setting. The visual contrast between the private grooming moment and the public, barred corridor underscores a narrative of personal reckoning and the desperate pursuit of closure.","video_1_relative_path":"videos/1915cbbdcef461aa.mp4","video_2_relative_path":"videos/c26c723c76e70c9f.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_davinci/multitalker/multitalker_10/example.json::00000072","text_prompt":"In a softly lit dining room framed by pale walls, sheer white blinds, and a teal ceramic floor lamp casting a warm glow at frame left, a static medium two-shot holds two middle-aged East Asian men seated opposite one another. Soft daylight from a window on the right balances the exposure, gently modeling their faces while a shallow depth of field keeps both subjects sharp against a subtly blurred background of a floral-upholstered wooden chair and a potted leafy plant. The man on the right, wearing a grey cardigan over a white shirt with his hair neatly combed back, leans slightly forward, his eyes fixed on his companion. As a faint clink of cutlery against crockery echoes in the quiet room, a calm, measured male Mandarin voice begins, stating “可千算万算，你就忘了还有老天爷一算,” as he makes a small outward gesture with his right hand, palm up, before letting it settle back on the tabletop.\n\nAcross the table, the man on the left, dressed in a black leather jacket over a white shirt, keeps his gaze lowered, brow furrowed, his fingers loosely gripping a tall glass of bright orange juice. The tabletop between them holds a white bowl with utensils, assorted breakfast plates, and a pair of dark-framed eyeglasses. Continuing in the same restrained tone, the same man adds, “这突然来个沙瑞金,” his expression tightening with a hint of sudden concern. The leather-jacketed man lifts his eyes momentarily toward his interlocutor, then looks down again and swallows silently. The scene holds its somber stillness, anchored by minimal diegetic ambience and the absence of music, allowing the gravity of the conversation and the subtle shifts in micro-expression to carry the narrative weight in a single, uninterrupted shot.","video_1_relative_path":"videos/1a275a55dc915c98.mp4","video_2_relative_path":"videos/eda324ab06715102.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_davinci/multitalker/multitalker_10/example.json::00000097","text_prompt":"Open inside an opulent traditional Chinese chamber bathed in soft daylight filtering through latticed windows and sheer curtains, the color palette leaning on deep reds, dark woods, and muted blues to evoke historical grandeur. The camera begins positioned just behind a standing man whose back faces the lens; he wears a dark, textured robe embroidered with subtle circular motifs on the upper back and keeps his long black hair secured in a high topknot with a small ornamental pin. In the mid-ground, another man reclines on an elevated wooden daybed draped with green cushions and a blue-and-gold patterned quilt, dressed in a white outer robe over lighter inner garments. A low side table bearing a brass candlestick and small objects sits near the foot of the bed. The ambient room tone is quiet, devoid of music or extraneous noise, focusing all attention on the unfolding conversation. As the standing man begins to speak in a calm, matter-of-fact tone, the camera executes a barely perceptible forward dolly, tightening the composition so both figures occupy more of the frame. He reports, \"He said, the background of the three assassins.\"\n\nWhile the first speaker finishes his sentence, the seated man listens attentively, eyes fixed on the speaker with a relaxed yet alert posture. A deeper, slightly gruff male voice cuts through the quiet, asking, \"What else?\" The standing man pauses, giving the seated figure space to respond. The seated man’s expression shifts from neutral listening to mild curiosity; he tilts his head fractionally and leans forward slightly as the camera continues its slow advance, settling into a balanced medium shot framing both characters from the waist up. Delivering his lines in a measured, thoughtful tone, he adds, \"He also said this fire may have been started by the Emperor himself.\" The standing man remains still, absorbing the revelation. The scene concludes without any additional action, music, or environmental noise, leaving the heavy implication hanging in a tense, deliberate silence.","video_1_relative_path":"videos/90b27f8b5b96fd8b.mp4","video_2_relative_path":"videos/d88758e3e624fbb5.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_davinci/multitalker/multitalker_3/example.json::00000037","text_prompt":"A late-afternoon riverside promenade glows in warm, golden sunlight as a smooth backward tracking shot holds a balanced medium two-shot of a woman and a man walking slowly toward the lens. The woman, fair-skinned with shoulder-length wavy blonde hair, wears a black sleeveless top with lace trim and carries a brown cross-body bag, while her companion sports light-brown hair, a short beard, and a dark blazer over a pale patterned shirt. Behind them, a calm river glints beneath a stone bridge and leafy trees lining the opposite bank, with a white-and-yellow sightseeing boat marked “PARIS CRUISE” moored quietly at the left edge. The shallow depth of field softly blurs the distant architecture, drawing focus to their faces as a woman with a light French accent, her tone earnest yet tinged with resignation, states, “For the same exact reason.” A man with a calm American accent, replying with gentle curiosity, asks: “What reason is that?”\n\nMaintaining their steady pace, the woman continues without pause, her voice gaining reflective intensity as she gestures subtly with one hand. She explains, “Well, all couples expect that after a few years of living together, the passion and that consuming desire will remain exactly as they were in the beginning.” Her expression shifts between seriousness and wistful melancholy, while the man listens attentively, nodding once with a faint smile of understanding. Sunlight catches the strands of her hair, casting soft highlights and stretching long shadows across the paved path, where distant pedestrians ascend stone steps near a small monument on the right. A low-level urban ambience of distant traffic rumble and faint crowd murmur underscores the scene without overpowering their voices, weaving a contemplative, intimate mood that lingers as the pair continue walking, their philosophical exchange about enduring love and settled routine left beautifully unresolved against the tranquil Parisian backdrop.","video_1_relative_path":"videos/c6e3f5866715d146.mp4","video_2_relative_path":"videos/57af584779955483.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_davinci/multitalker/multitalker_3/example.json::00000044","text_prompt":"A locked-off eye-level medium shot captures a brightly lit apartment hallway, bathed in soft, even key light from the front-left that casts minimal shadows across warm neutral walls and wooden surfaces, punctuated by vivid accents. At the left edge stands a blonde woman seen mostly from behind, her short-sleeved top displaying a dense pink-green-yellow floral pattern with a red-and-white striped hood interior. Facing her in the doorway is a dark-haired man in black-rimmed glasses, wearing a black zip-up jacket over a graphic tee featuring a yellow rectangle with a simple cartoon figure. Behind him, a wooden door is secured with two strips of bright yellow caution tape and a partially visible red sign, while a decorative silver chain and a double light switch adorn the adjacent wall. The man holds a single white sheet of paper, his gaze shifting slightly upward toward the woman with his mouth half-open, ready to speak.\n\nHe lowers his eyes to the document and begins in a hesitant, mildly apologetic tone, “Um… here’s the thing.” As he speaks, he lifts both hands to grip the opposite edges of the page, giving it a quick, nervous flick that produces a soft rustle perfectly timed with his words. His eyebrows lift and his lips purse, betraying a flicker of embarrassment before he glances back up at the woman with a sheepish expression. Immediately after his line finishes, a burst of layered canned studio laughter erupts, filling the space with energetic male and female chuckles that sustain the comedic mood until the scene ends. The woman remains partially turned away, her reaction obscured, while the camera holds steady on the awkward exchange.","video_1_relative_path":"videos/01758942a962ce79.mp4","video_2_relative_path":"videos/1e7a812a8075cbfc.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_davinci/multitalker/multitalker_7/example.json::00000047","text_prompt":"Cinematic drama captured on a locked-off tripod at eye level, bathed in warm household lighting with a muted earth-tone palette punctuated by a red wooden cabinet. The scene opens on a static medium close-up of an East Asian man in his late thirties, seated indoors in a quiet room. He wears a black-and-white plaid flannel shirt left open over a plain white T-shirt, his short black hair neatly styled. Behind him, the cabinet holds small framed photos, while a dark console table to the right supports a lit lamp that spills a soft key light across a cream wall and a large framed painting. A white control panel is mounted farther right. The camera remains fixed, capturing only his subtle head tilts and mouth movements as his brows knit and eyes widen with indignant frustration. A firm, medium-low pitched Mandarin male voice, indignant and steady, states, “要钱有钱，要地位有地位，哪轮着我这个当大哥的去关心她。” The audio environment is stripped of background music, leaving only his clear, resonant speech to fill the space.\n\nA straight cut shifts to a matching medium close-up of an East Asian woman in her mid-thirties, also seated indoors. Her long dark hair is pulled back loosely, and she wears a light grey zip-up hoodie over a darker grey crew-neck T-shirt. Her arms are folded across her chest, her gaze cast downward as she conveys restrained displeasure through micro-expressions and tightened lips. The background features two ornate bedside tables, each topped by a brass-based lamp with a beige shade that casts soft, warm light, alongside a tall mirror and closed horizontal blinds at the far left. The locked-off framing emphasizes conversational realism, while the enclosed domestic setting and contrasting lighting subtly underscore a tension between material success and familial obligation. A calm but irritated medium-high pitched Mandarin female voice, measured and restrained, replies, “这话我就不爱听。” The scene holds on her quiet defiance before ending abruptly, with no fade-out or additional sound.","video_1_relative_path":"videos/3bba187f86f09ab2.mp4","video_2_relative_path":"videos/9b39a59da44d9acb.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/instruments/instruments_1/example.json::00000021","text_prompt":"A cinematic performance piece unfolds in a bright, sun-lit room with polished hardwood floors and large windows framing leafy greenery outside, casting a warm, domestic glow. The scene opens on a static medium-wide shot capturing a piano and cello duet. On the left, a woman in a white long-sleeved top, dark jeans, and light boots sits upright on a piano bench, her shoulders relaxed and gaze fixed on illegible sheet music. To her right, a man cradles a reddish-brown cello between his knees, bow poised. They begin in perfect unison: her fingers descend rapidly across the keys while his bow draws downward in one smooth stroke. The piano erupts in a bright, percussive ascending arpeggio, crisp key clicks audible beneath the metallic resonance, while the cello answers with a warm, resonant sustained note that fills the mid-range. The camera holds steady as their physical movements mirror the music—her elbows rise and fall with each chord change, his torso swaying subtly in time with the pulse. The musical texture thickens as the pianist shifts into flowing broken-chord figures, introducing a syncopated, dance-like momentum at a steady tempo around 140 to 150 beats per minute. The cellist responds with rapid bow changes and precise intonation, his contact point shifting to add tonal coloration, while a gentle crescendo swells and both musicians lean slightly forward, bow speed intensifying.\n\nThe cello then introduces a descending melodic fragment, articulated with crisp staccato touches, as the piano sustains a triadic harmonic foundation in a minor mode with modal inflections. Visually, the scene transitions through a subtle cross-dissolve that overlays a semi-transparent close-up of the cello onto the original wide shot, emphasizing the instrument’s glossy wood grain and a silver microphone positioned just below the bridge. The overlay fades smoothly, settling into a tight close-up focused solely on the cellist’s hands and the instrument. In this intimate framing, the cellist employs vigorous spiccato bowing, executing light, bouncing strokes that impart a lively, springy quality to the sound. Each bounce syncs with visible upward flicks of his bow arm, captured clearly by the shock-mounted microphone alongside the subtle friction of bow hair and the piano’s residual harmonic support. The energy escalates into a climactic flourish as the cello ascends rapidly through several notes, culminating in a resonant high pitch that rings out with natural decay. The pianist holds the final chord, fingers resting lightly, while the cellist slowly draws the bow across the string before gradually releasing pressure. The scene concludes without a fade-out, freezing on the vibrating strings and the poised bow, leaving only the moderate room reverberation and the quiet intimacy of the sunlit room to linger.","video_1_relative_path":"videos/ceeb42e487b6be1c.mp4","video_2_relative_path":"videos/db78fa03e40928b4.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/movie/movie_1/example.json::00000023","text_prompt":"A cinematic naval aviation sequence opens with a wide, high-angle establishing shot under a heavy, overcast twilight sky. The lighting is dim and desaturated, dominated by deep blues and greys with a faint orange glow along the horizon. A massive aircraft carrier cuts through the water from right to left, its deck lights glowing faintly against the dark hull, while two smaller warships follow in formation, their silhouettes muted in the gloom. From the far right edge, a single-engine propeller plane enters, skimming low just above the waves toward the carrier’s starboard side. The camera slowly pans left to keep the carrier centered while tracking the aircraft’s trajectory. A continuous, ominous orchestral score underpins the entire scene, beginning with a sustained low-string drone and subtle brass pads that establish a suspenseful atmosphere. Soft wind ambience fades in, layered with the distant, growing rumble of the approaching engine, which rises in pitch and volume as the plane draws nearer, complete with a noticeable Doppler shift.\n\nAs the aircraft closes in, it banks sharply and descends toward the flight deck, landing gear visibly deployed. The wind buffeting intensifies, and the engine roar peaks momentarily, mirroring the visual tension of the approach. The camera holds steady in a single unbroken take, capturing the plane as it makes contact with the deck. A sharp metallic thud echoes, followed by the brief, localized screech of tires gripping the metal runway and a faint spray of water kicked up upon impact. Beneath the main action, subtle hull creaking and water displacement sounds ground the scene in a realistic, dry maritime environment with minimal reverb. The plane rolls forward along the deck, accompanied by a barely perceptible mechanical hum and vibration. The orchestral tension swells from a quiet murmur to a full forte, culminating in a sustained brass and string sting that cuts off abruptly the moment the wheels settle, leaving a stark silence that emphasizes the finality of the landing and the gritty, foreboding isolation of the vast seascape.","video_1_relative_path":"videos/0dee166b15095a4d.mp4","video_2_relative_path":"videos/df4651b0ef8d5887.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/movie/movie_1/example.json::00000058","text_prompt":"A cinematic wide shot, captured from a high angle, reveals a vast, desolate expanse of cracked gray-brown earth bathed in an intense orange glow from the upper left. Thick, dark smoke billows across the barren terrain as a powerful explosion erupts at the center-left, sending a violent plume of dust and debris skyward. The scene is immediately punctuated by a sharp, percussive boom and the crackling scatter of falling material, establishing a raw, apocalyptic atmosphere.\n\nThe camera rapidly tilts downward and zooms in as a lone figure clad in a bulky tan protective suit is hurled backward into the air by the blast’s force. Tumbling helplessly through the smoke-choked atmosphere with limbs flailing, the subject is caught in a shifting palette where the lingering warm tones above give way to a cooler, purplish hue on the scarred ground below. A deep, resonant rumble and a wind-like whoosh accompany the ejection, grounding the physical impact in sound.\n\nAs the figure continues to fall, rotating slowly against the desolate backdrop, fine particles of dust swirl around them, catching the dim, diffused light. The camera tracks their descent smoothly, maintaining a tight focus on the solitary form against the barren landscape. The overwhelming rumble gradually decays into near silence, leaving only a faint atmospheric hush that underscores the profound isolation and devastation of the aftermath.","video_1_relative_path":"videos/55e647b146ca3b10.mp4","video_2_relative_path":"videos/df20415be5f83e87.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_10/example.json::00000078","text_prompt":"Cinematic suspense drama, static eye-level medium shot, natural daylight, warm earth tones contrasted by vivid red and muted green. The scene opens on a sun-bleached desert landscape of red-brown soil, scattered sagebrush, and distant layered cliffs beneath a pale blue sky streaked with thin clouds. A white recreational vehicle with orange-and-yellow stripes is parked to the right-rear of frame. Two men stand facing each other near its rear bumper. The man on the left, middle-aged with light skin, short dark hair, glasses, and a mustache, wears a light-green long-sleeved button-down shirt over a white undershirt. He speaks in a calm, measured baritone with a General American accent, stating, \"Moisture, accelerated by heat, yields phosphorus hydride.\" A faint, high-pitched insect chirp underscores the quiet, isolated ambience.\n\nThe camera remains completely still, holding the composition as natural daylight casts soft shadows on the sandy ground. The listener, slightly younger with short spiky brown hair, wears a grey long-sleeved shirt beneath a bright-red quilted puffer vest and stands mostly in profile, absorbing the information with focused intensity. The speaker pauses briefly, maintaining eye contact, before continuing with a slight downward inflection that underscores the gravity of the chemical, adding, \"Phosphine gas.\" The red-vested man shifts his posture imperceptibly forward, his head bowing slightly as he processes the lethal implications of the clandestine activity hinted at by the RV's presence.\n\nAfter a short, tense pause, the green-shirted man lowers his voice fractionally, his tone dropping into a cautionary murmur as he trails off ominously before completing the warning: \"One good whiff and it's over.\" He blinks once and holds his gaze steady on the listener. The background insect sound persists at a low volume, reinforcing the sense of isolation and mounting tension as the static frame lingers on the two figures against the vast, sun-drenched desert backdrop.","video_1_relative_path":"videos/779eb9fe6906d443.mp4","video_2_relative_path":"videos/badf2f44294ee97c.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_12/example.json::00000007","text_prompt":"Open on a single locked-off, eye-level medium-wide shot that holds steady throughout, capturing three young East Asian men seated side-by-side on a vivid red sofa in a dimly lit lounge. Warm amber and red accent lights wash over background shelves lined with liquor bottles, while a soft front-left key light gently illuminates their faces. In the foreground, a low coffee table holds an assortment of drinks—a green beer bottle, a dark glass bottle with a red-and-white label, a clear water bottle, a brown liquor bottle, and a bowl of pale chips—while a woman in a red sweater sits blurred at the far left and another patron in blue lingers faintly in the background. The scene is bathed in a cozy, contemporary urban drama palette, contrasting the rich reds of the sofa and lighting with the cooler greys and blues of the men’s clothing. A calm, explanatory male Mandarin voice begins, stating \"这种学生，江湖人称课代表。\" As he speaks, his eyebrows lift slightly and he gestures with his right hand, palm up, emphasizing the phrase.\n\nThe man in the middle, dressed in a black-and-white plaid shirt over a black T-shirt, glances toward the speaker with attentive stillness, hands clasped around his knee, while the man on the left in a grey fleece hoodie maintains a neutral, forward gaze. After a brief pause and a concluding nod, the speaker adds \"有道理。\" immediately followed by a short burst of canned laughter that fades in underneath his voice before receding. He then resumes in a reflective cadence, his delivery slowing as he continues, \"每个老师都有这样的一个心腹，专门替他们留意班上的动静。\" The camera remains completely static, the warm practical fill from the bar area preserving the depth and intimate, conversational framing as his voice carries the narrative weight, leaving the lounge atmosphere quietly suspended on his final, measured words.","video_1_relative_path":"videos/830a282b4d45ed53.mp4","video_2_relative_path":"videos/0571d74633d3a54a.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_3/example.json::00000000","text_prompt":"A daytime television scene captured in a steady, front-facing medium shot from just outside the hood of a moving red convertible, gliding down a multi-lane suburban street under even natural daylight. Shallow depth of field keeps the cabin sharply focused while blurred trees, traffic lights, and passing vehicles streak through the windshield, emphasizing forward motion. Inside, a blonde woman in a vivid pink top keeps both hands firmly on the steering wheel, her gaze locked straight ahead. Beside her, a dark-haired man in a grey T-shirt featuring an orange crescent-and-star graphic turns slightly toward her. A calm, mid-range male voice begins, stating \"Four hundred pounds.\" The woman quickly corrects him without breaking her focus on the road, turning her head slightly as a bright, lightly teasing female voice replies, \"Let’s say forty-three ninety.\" The man acknowledges her precision with a small nod and a faint smile, then responds crisply, \"Fine,\" before immediately returning his gaze to the road, his expression settling into mild resignation. The background continues to glide past the windows as he resumes, his tone shifting to mild surprise and analytical observation: \"We’re traveling forward at… good lord… fifty-one miles an hour.\" He glances sideways with raised eyebrows, as though confirming the speedometer, while the woman maintains her forward focus, lips pursed in concentration. Throughout the exchange, the audio landscape remains strictly diegetic, anchored by a subdued, low-frequency engine and road hum that underscores the clear, close-mic’d dialogue. The friendly banter and contrasting body language—her steady grip on the wheel versus his animated facial expressions—convey a lighthearted, conversational rhythm typical of contemporary television, all rendered in saturated colors with the red exterior and pink top popping against the daylight backdrop.","video_1_relative_path":"videos/b26f01dd34a2b3e0.mp4","video_2_relative_path":"videos/128c37491fce55dc.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_3/example.json::00000004","text_prompt":"A dimly lit interior bathed in a cool bluish-gray nocturnal palette is pierced by a single warm lantern glow at the far left, casting elongated shadows across rough-hewn wall panels and wooden lattice windows. Shot in a static medium two-shot with a shallow depth of field that isolates the subjects from the blurred architectural background, the frame holds a symmetrical composition of a young woman and a young man seated side-by-side on a low woven mat atop polished dark stone tiles. The woman, dressed in a pale mint-green robe with white floral embroidery over a cream under-layer, her long black hair half-up and adorned with delicate silver-white ornaments and dangling earrings, gazes intently at her companion with hands resting calmly in her lap. The man, wearing an off-white outer robe trimmed with light green over a darker inner garment, holds both of her hands gently between them, his head bowed and eyes lowered to their joined palms. A soft, slow orchestral score led by sustained strings and faint piano begins immediately, establishing a tender yet slightly melancholic atmosphere. A calm, soft female Mandarin voice murmurs, “嗯。” The man lifts his gaze toward her just enough to speak, a quiet, intimate male Mandarin voice saying, “等一下。” before he lowers his eyes again. As he speaks, he shifts his right hand away from hers and raises it toward the collar of his robe, his fingers brushing the fabric near his neck as if he has noticed something amiss. The woman’s expression tightens minutely; she watches him with restrained concern, her lips parting as if about to ask what is wrong. Continuing his inspection, the man pinches a fold of his robe close to his chest and sniffs delicately, his brow furrowing as a soft, reflective male Mandarin voice murmurs, “好像有什么东西。” He keeps his attention fixed on the spot he examined, inhaling once more while still holding the robe edge between his thumb and forefinger. The orchestral bed swells almost imperceptibly, adding a hint of tension before settling back into its original hush. Both figures remain seated in silent anticipation—the woman’s brows knitting, the man poised as though awaiting a revelation—while the restrained ambient score lingers beneath the fading image, leaving the discovery open-ended.","video_1_relative_path":"videos/a56cdb2a99075006.mp4","video_2_relative_path":"videos/49a5f9aa9a9f5aeb.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_6/example.json::00000071","text_prompt":"A warm, widescreen sitcom scene opens on a static, eye-level medium-wide shot, bathed in soft tungsten key light from above-right that casts gentle shadows across hardwood floors and beige walls. The camera remains locked off in a balanced composition, framing a neatly made bed with a blue-and-white striped comforter where a man in his early thirties sits cross-legged. Dressed in a green-black-white plaid flannel over a white T-shirt, he is slightly hunched in concentration, his attention fixed on a large three-dimensional molecular model of red, blue, and white spheres linked by black rods. Behind him, a wooden dresser holds labeled storage boxes and a framed black-and-white photograph of the Golden Gate Bridge, while a dark bookshelf packed with books and comic volumes lines the right wall. From an open white door, a woman in her mid-forties enters, wearing a knee-length red dress beneath a long-sleeved floral cardigan and black heels. She steps onto a small blue rug, her expression bright and welcoming as she greets him, \"Good morning, Snickerdoodle.\"\n\nA brief burst of canned audience laughter rises to signal a sitcom atmosphere before fading into quiet domesticity. The man glances up from his model, offering a polite half-smile while keeping one hand resting on the sphere assembly, and replies quietly, \"Morning.\" His tone is subdued and distracted, his gaze already returning to the intricate structure. The woman pauses beside the bed, hands lightly clasped, and tilts her head with playful intrigue. Leaning slightly forward, she asks, \"Oh, well, that looks awful fancy. What is that?\" as she studies the colorful arrangement. The man continues manipulating the model without looking up, fully absorbed in his work, while the frame holds steady on their mid-interaction, capturing the cozy, character-driven warmth of the scene.","video_1_relative_path":"videos/cc68725ea3397848.mp4","video_2_relative_path":"videos/22682d302610fc29.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_7/example.json::00000010","text_prompt":"Bathed in warm late-afternoon golden-hour sunlight that glints off the Seine, a cobblestone riverside promenade in Paris sets a romantic, cinematic stage. A steady, eye-level camera captures a medium shot of a blonde woman in a sleeveless black top with a brown shoulder strap and a dark-haired man in a dark blazer over a white open-collar shirt walking side by side. Their faces light up as they spot someone ahead, and the man extends his right hand, calling out: \"Monsieur, pardon, pourriez-vous nous aider ?\" The woman steps slightly forward, adjusting her bag strap, and speaking in French with a courteous yet slightly hurried tone: \"Ça vous arrive de me déposer au passage Dix Rue des Petites Écuries ?\" The camera executes a gentle leftward pan to keep the pair centered while revealing more of the riverbank and the distant Gothic silhouette of Notre-Dame Cathedral across the water. An older man with wavy blondish hair and a dark suit jacket turns to face them, completing a loose triangle as the three begin their conversation.\n\nThe older man responds with warm, friendly enthusiasm, stating: \"Oui, oui. Allons-y.\" He pivots to lead the way, stepping leftward along the quay, and the woman nods appreciatively while the first man gives a small confirming gesture. All three begin to move together in the same direction, their figures gradually shifting toward the left edge of the frame as the camera makes a slight corrective pan to maintain composition. The shot remains a single continuous take with a moderately shallow depth of field, keeping the subjects sharply focused while softly blurring the passing boats and cathedral spire in the hazy distance. The palette relies on authentic environmental tones—warm skin hues, muted stone greys, and the reflective blues-golds of the river—illuminated by natural sunlight that casts soft shadows and fades gently as the scene concludes. Throughout, the soundscape is intimate and uncluttered, carrying only the soft hush of distant city traffic and the light murmur of water movement, with no music or crowd noise to distract from the quiet, chance encounter.","video_1_relative_path":"videos/e9c6d2b4118519df.mp4","video_2_relative_path":"videos/d0fcd02862163a26.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_8/example.json::00000034","text_prompt":"Cinematic European travel romance, steady medium two-shot with a subtle push-in, bathed in warm, saturated golden-hour sunlight that glints off the Seine and catches the distant twin towers of Notre-Dame. The stone-paved riverside promenade frames a blonde woman in a black sleeveless top and a brown shoulder bag standing opposite a dark-haired man in a charcoal suit jacket over a pale patterned shirt. A low urban hum and the soft rustle of leaves underscore the moment as she begins speaking in a calm, measured American accent, raising a hand to adjust her hair. \"Well, I can take the metro. I'm fine,\" she states, her tone composed yet insistent. The man immediately interrupts, shaking his head and flicking both hands outward in a rapid, urgent denial. \"No, no, no, no, no, no, please just listen,\" he insists, his pace quickening as he glances at his wristwatch before locking eyes with her. He continues explaining in a persuasive, rising cadence, palms opening toward the sky for emphasis. \"My flight's not until ten, right? They've got me arriving two hours early. This way we can keep talking,\" he says, a hopeful smile breaking across his face as he gestures forward, inviting her to accompany him. The woman listens with lips pressed together, absorbing his rationale before exhaling lightly, her eyebrows lifting in mild surprise. \"No, no, no, Monsieur,\" she answers in a slightly skeptical tone, lifting her right hand in a restrained half-wave to signal distance. As the camera subtly widens to reveal moored boats along the quay, a crisp off-screen male voice cuts in from behind them. \"Monsieur, if I may interrupt,\" the French-accented voice calls out. The man pivots his head toward the sound, his expression shifting to polite attentiveness, while the woman turns her gaze in the same direction, leaving the exchange suspended in the warm, cinematic light.","video_1_relative_path":"videos/35d8427c6534ca2f.mp4","video_2_relative_path":"videos/e725c45b6f6387df.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/music/music_2/example.json::00000036","text_prompt":"Cinematic live-performance scene, medium shot transitioning to extreme close-up, warm natural and ambient lighting, rich earthy palette with black and gold accents. A young woman with long, wavy blonde hair stands behind a glossy black grand piano in a sun-drenched, semi-outdoor café lounge. Bathed in the glow of overhead string lights and ivy garlands mixed with strong daylight from large glass windows, she wears a fitted black long-sleeved top and a chunky gold necklace with large circular pendants. The space features exposed brick walls, wooden bar stools, two acoustic guitars leaning against the left wall, and a tall fiddle-leaf fig plant to the right. The camera holds static, framing her upper body and the reflective piano surface that mirrors the ceiling lights and her earnest, focused expression. As she begins to sing, a solo female vocal line emerges, supported by soft, arpeggiated acoustic piano chords in a slow-tempo ballad. The audio carries a clean, spacious reverb that blends her emotive mid-to-high register melody with the gentle room tone, creating an organic yet controlled acoustic atmosphere.\n\nA hard cut shifts the frame to an extreme close-up, tightly cropping from forehead to chin. Her eyes close as she sustains the final phrase, subtle facial muscles engaging with a slight vibrato that emphasizes the emotional delivery. The background dissolves into a soft blur from shallow depth of field, isolating her face and drawing full attention to her intimate performance. The vocal and piano accompaniment continue seamlessly without interruption, maintaining consistent dynamics and a delicate balance of natural room reflections. Faint, barely perceptible inhalations between phrases confirm the live, unfiltered nature of the recording, while the absence of external noise or mechanical foley keeps the focus entirely on the resonant, heartfelt duet of voice and keys.","video_1_relative_path":"videos/051cdcc7a024af54.mp4","video_2_relative_path":"videos/d975cf577b33e13c.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/music/music_2/example.json::00000070","text_prompt":"Cinematic pop-rock performance, captured on a 35mm lens with high-contrast industrial lighting and a cool, saturated palette. The sequence opens with a low-angle close-up of a bald male vocalist singing passionately into a black microphone on a stand. He wears dark sunglasses, multiple earpieces in his right ear, a studded leather wristband on his left wrist, and visible tattoos across both forearms. His mouth is wide open mid-phrase, conveying intense vocal effort as he projects a strong, slightly raspy chest voice, delivering the line “And wash away,”. Above him, a corrugated metal ceiling hosts rows of bright white pendant lights suspended by green cords, establishing a gritty, theatrical ambiance. The audio features a driving pop-rock arrangement: distorted electric guitars, a punchy bass, and energetic drums lock into a fast 145 BPM tempo, while cymbal crashes punctuate the downbeats in a loud, heavily compressed, studio-polished mix.\n\nA hard cut immediately shifts to a static wide shot that reveals the full six-piece band arranged across two tiers. On the left, a guitarist in a maroon shirt plays a light-colored electric guitar, with a keyboardist operating equipment on a raised platform behind him. Center stage, another musician plays an orange-bodied electric guitar while standing at a keyboard, flanked by a drummer seated behind a large chrome kit and the lead vocalist positioned slightly forward on the far right. All performers wear casual stage attire of dark jeans, t-shirts, and button-downs. Dominating the rear wall is a circular blue emblem featuring a white lightning bolt and the words “POWER THE WORLD” arched in bold white lettering, framed by dense rows of overhead string lights that bathe the scene in even illumination. The vocalist sustains the phrase “For life,” holding the final note with controlled vibrato as the band maintains relentless rhythmic intensity. The soundscape remains entirely focused on the musical performance, stripped of crowd murmur or ambient room noise, leaving only the tight, reverberant instrumentation and the singer’s commanding delivery to fill the space.","video_1_relative_path":"videos/daca22531cd56181.mp4","video_2_relative_path":"videos/1c01355dc38012f4.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/physics/physics_2/example.json::00000089","text_prompt":"A minimalist, meditative close-up shot frames a smooth tan wooden carving resting on a flat, light-gray surface under diffuse, shadow-free lighting. The fixed lens maintains a centered composition with a neutral background, while the palette balances soft earth tones against the ornate red and purple panels of the circular cushion beneath the sculpture. The piece itself resembles a stylized face or mask, rounded at the top and tapering down to a base gently clasped by two wing-like appendages etched with fine, feather-like incisions. Its eyes are rendered as oval indentations filled with a cross-hatched texture, while a V-shaped notch forms the mouth, flanked by subtle carved ridges.\n\nThe quiet stillness is punctuated by a sequence of six deliberate, sharp percussive strikes. Each impact carries a crisp attack and short decay, producing a dry, mid-to-high frequency resonance characteristic of wood meeting wood, suggesting a small implement tapping the sculpture or its base. Just as the final strike echoes, a blurred pale hand briefly enters from the upper right, holding a slender stick or mallet, before retreating out of frame. The scene settles back into complete stillness, leaving only a faint, steady room tone or electronic hum beneath the silence. The deliberate rhythm and tactile interaction emphasize craftsmanship and sonic precision, creating a quiet, focused atmosphere that draws full attention to the material resonance of the carved object.","video_1_relative_path":"videos/819d18a097b8baca.mp4","video_2_relative_path":"videos/da2dd5ddec7c8d1b.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/physics/physics_5/example.json::00000003","text_prompt":"Cinematic coastal study, shot on a static low-angle lens positioned at the water’s edge under a muted, overcast sky. The composition is anchored by a centered horizon line that cleanly divides pale gray clouds from turquoise-green ocean, while damp, packed sand in the foreground catches soft, diffuse highlights. Far out on the swells, two indistinct dark silhouettes bob rhythmically, adding scale without breaking the isolation. The audio landscape opens with the continuous, immersive roar of surf, beginning with a low-frequency rumble that swells in texture as the first gentle wave approaches. It crests near the camera with a broad-spectrum crash and splash, immediately receding into a quiet fizz of popping bubbles and draining water.\n\nA second, heavier wave follows, its deeper resonant growl building into a more percussive impact that violently collapses against the shore. A spray of frothy white water flicks across the lower frame, momentarily blurring the view before sliding back seaward, leaving behind a brief acoustic lull filled only with the granular hiss of retreating foam. The third wave rises smoothly, its greenish-blue face catching subtle shifts in the flat daylight as it breaks into a lateral spread of whitecaps and shallow rivulets. The corresponding soundscape mirrors this motion with a crisp, airy crackle followed by a soft, gurgling decay as water filters through the sand. Throughout the sequence, the camera remains fixed, maintaining an intimate ground-level perspective that captures the hypnotic, unbroken cycle of tide and sound. Stripped of all artificial noise, voices, or mechanical hum, the scene breathes as a meditative, raw portrayal of nature’s constant rhythm, where every visual swell and acoustic transient aligns in seamless, cinematic harmony.","video_1_relative_path":"videos/696f737cf230dac2.mp4","video_2_relative_path":"videos/a8b07588744d4d80.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/physics/physics_7/example.json::00000017","text_prompt":"Cinematic vertical close-up, chiaroscuro lighting, cool metallic palette: a chilled silver aluminum beverage can sits against a pure black backdrop, its surface beaded with fine condensation that catches the directional light. The illumination sculpts the top rim and pull-tab while leaving the body in deep shadow, emphasizing the tactile textures and reflective curvature. The camera remains locked off as a right hand enters from frame right, warm skin contrasting sharply with the cold metal as fingers gently wrap around the can’s midsection. A soft, dry rustle of skin sliding over chilled aluminum fills the near-silence, accompanied only by a faint, acoustically dampened room tone. A left hand then rises into view, positioning thumb and forefinger on the pull-tab with precise micro-adjustments that produce light, high-pitched metallic clicks as nails brush the edges.\n\nThe left thumb presses down firmly, triggering a sharp, brittle snap as the rivet breaks, immediately giving way to a steady pressurized hiss. The tab pivots upward, and thick white foam erupts in a sudden, voluminous burst, splashing over the rim and cascading down the can’s side in viscous streams that coat the previously dry metal. The audio swells into a loud, turbulent gush layered with fizzing bubbles and soft, rhythmic plops as the liquid drips off-frame, peaking in intensity before settling into the sustained hiss and steady runoff. The shot holds its static framing, capturing every detail of the effervescent rupture and the lingering dampness, delivering a minimalist, cathartic sensory payoff that transitions from anticipatory silence to chaotic, hydro-mechanical release.","video_1_relative_path":"videos/d85d9dc2fc24e76d.mp4","video_2_relative_path":"videos/312a739bc6fda630.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/physics/physics_7/example.json::00000086","text_prompt":"Rendered in a cinematic macro style with a vertical aspect ratio, the scene opens on a tightly framed close-up of a cicada clinging to the rough, mottled bark of a thick tree trunk during twilight. The composition is anchored by a cool, deep blue evening palette, with out-of-focus bare branches fading into the dusk behind the subject. Soft, directional artificial light positioned near the camera gently sculpts the frame, casting subtle shadows that emphasize the bark’s texture, the sharp protruding thorns, and a pale scar just below the insect’s abdomen. The cicada remains almost entirely still, its gray-brown wings and body highlighted by the steady illumination, with only the faintest, almost imperceptible twitches of its legs and antennae breaking the stillness. The camera holds fixed, refusing any pan, tilt, or zoom, allowing the viewer to linger on the intricate contrast between the creature’s delicate form and the rugged, thorny wood.\n\nAurally, the scene is dominated by a loud, continuous, high-pitched stridulation that fills the soundscape with unwavering intensity. Recorded with a proximity that suggests a microphone placed inches from the subject, the cicada’s piercing buzz maintains a consistent amplitude and spectral profile, creating an immersive, hypnotic atmosphere typical of a quiet summer evening. The acoustic environment remains completely dry, stripped of wind, ambient wildlife, or any underlying room tone, leaving the insect’s song as the sole auditory presence. Just as the visual stillness reaches its peak, the buzzing ceases instantaneously without a fade or drop in volume. The frame holds for a final, breathless moment in absolute silence, punctuating the twilight scene with a stark, lingering quiet that underscores the raw, unadorned intensity of nature captured in miniature.","video_1_relative_path":"videos/8dfcf078e0f756db.mp4","video_2_relative_path":"videos/3686c497ce08b2e6.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/voiceover/voiceover_1/example.json::00000035","text_prompt":"A cinematic gastronomic documentary sequence opens on an extreme macro shot with soft, even lighting and a pale green and clear palette, where countless translucent spheres resembling fish roe drift lazily in a shallow pool of liquid. Faint ripples disturb the water, catching the glossy surfaces and tiny dark specks dotting the eggs. A calm, measured male narrator in Standard Mandarin speaks over a subdued, traditional instrumental bed led by an airy flute and sustained strings, stating, \"Only about eight kilograms can be collected in a single summer.\" The camera holds this contemplative composition as the music swells gently beneath his voice, establishing a tone of seasonal reverence before a hard cut transitions the scene.\n\nThe frame shifts to a rustic kitchen bathed in bright, warm daylight streaming through a window. In a medium shot, an older woman wearing a blue-and-white vertically striped shirt and red patterned elbow sleeves lifts the heavy lid from a large black wok set into a white-tiled stove. A thick plume of steam billows upward, momentarily veiling her face as she lowers a round bamboo steamer basket onto the wok. Beside it, a blue-and-white porcelain bowl holds chopped green onions and ginger slices. The scene is grounded by crisp kitchen Foley: a sharp metallic clink as the lid is removed, followed by a hollow wooden thud when the steamer settles. The camera cuts to an overhead close-up of the bowl as the woman’s hand scoops and sprinkles the aromatics, then tilts the vessel to pour a clear liquid over them. As the narrator instructs, \"Pour on the scallion and ginger juice,\" a soft splash echoes through the room. Steam wafts gently above the glistening mixture while the quiet instrumental track carries the sequence to a peaceful close, visually and sonically bridging delicate natural ingredients with humble home cooking.","video_1_relative_path":"videos/efe75e186a5e46b2.mp4","video_2_relative_path":"videos/449d21c80954ab22.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/voiceover/voiceover_4/example.json::00000006","text_prompt":"A static, over-the-shoulder medium close-up in 16:9 frames a tense clinical encounter, placing the viewer directly behind the out-of-focus shoulder of a medical professional in light blue-green scrubs and a surgical mask. Across the shallow depth of field, a Black woman sits upright on a hospital bed, her short tightly curled black hair and teal-blue patient gown contrasting against the pale green walls and beige paneling of the sterile room. Bright, cold overhead lighting casts soft shadows beneath her chin while catching a thick, raised scar along the right side of her neck. Her complexion bears a faint sheen of perspiration, and her wide, glistening eyes lock onto the unseen figure, breathing shallowly as a calm, low-pitched male Mandarin voice-over begins, stating \"早说出了一段更令人毛骨悚然的真相。\" with a measured, suspenseful cadence and a deliberate pause that underscores the gravity of the revelation.\n\nWithout a cut or shift in framing, the woman’s lips part slowly, her quiet yet firm Portuguese delivery cutting through the otherwise silent room: “Mas sabe o que é pior?” Her voice carries a subtle tremor of fear tempered by weary resolve, and as she finishes the question, her expression tightens with dread and determination. The absence of ambient noise or music isolates every syllable, forcing the audience to focus on her micro-expressions and the psychological weight of the cross-cultural interrogation. The muted palette of greens, teals, and beiges, combined with the stark, high-key lighting, reinforces the clinical tension, leaving the unresolved question hanging in the sterile air as the shot holds steady on her glistening eyes.","video_1_relative_path":"videos/bc313b9dce519cd8.mp4","video_2_relative_path":"videos/1c04ec224eacffe9.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/voiceover/voiceover_7/example.json::00000089","text_prompt":"Cinematic low-key drama, shot on a 50mm lens with a shallow depth of field, opens in near-total darkness. A faint bluish-green rim light skims the right edge of the frame, barely outlining the chest-up profile of a figure on the left. The person, with long hair and a light-colored top, bows their head while pressing both hands over their mouth and nose to stifle their grief. The scene is utterly silent save for a sharp inhalation that quickly fractures into a wet, trembling sob, rising in pitch before dissolving into a series of short, ragged cries. The absence of music leaves the raw emotion stark against the blackness. As the weeping continues, a calm adult male voice-over in standard Mandarin begins to narrate in an even, somber tone, stating \"罗宇终于明白，他们再也回不去了。\" The narration overlays the muffled sobs without competing for attention, while the dim blue-green lighting holds steady on the distressed silhouette.\n\nA hard cut abruptly shifts the scene to a brightly lit interior, now framed as a medium close-up of a man seated behind a desk. He wears a dark suit jacket, crisp white shirt, and red tie, with neatly styled short black hair and his hands clasped before him. A gooseneck microphone angles toward his mouth, while vertical blinds and a framed picture blur softly in the background under neutral, even office lighting. The man stares straight ahead with a grave, listening expression as the narrator’s voice continues, trailing off before completing the thought: \"几天后，法院的裁决终将落下。\" The camera holds on this static, tense tableau, leaving the outcome unresolved and emphasizing the stark transition from private anguish to formal consequence.","video_1_relative_path":"videos/820d8daa157b9de0.mp4","video_2_relative_path":"videos/9d4c0af98dbc56f9.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/voiceover/voiceover_9/example.json::00000069","text_prompt":"Cinematic thriller tone, shot on a 35mm lens with cool, desaturated color grading and soft, diffused shadows cast by overcast daylight streaming through a large window in a dim, industrial concrete room. The camera holds a static medium shot from behind the back of a bald man’s head, focusing on a middle-aged Caucasian man in a light-green short-sleeved button-down over a white T-shirt. He is bent forward, rummaging through an olive-drab canvas duffel bag resting on his lap, revealing several thick bundles wrapped in brown paper that resemble stacks of cash. Beneath the scene, a low, ominous electronic drone sustains a tense atmosphere. A lively, slightly dramatic male Mandarin narrator begins, stating “As soon as he turned around, Fat Head Fish actually pulled out a meat tenderizer.” The camera executes a sharp cut to an extreme close-up of hands slowly rotating a heavy metal meat tenderizer, its rectangular steel head studded with blunt pyramids catching the cold light against a blurred concrete backdrop.\n\nThe sequence returns to a static medium close-up of the man in the green shirt, framed from the mid-chest upward. He looks up toward someone just off-screen to the right, his eyes widening with sudden excitement. Delivering the line with a deep, resonant American accent and slightly theatrical emphasis, he declares, “You know, Roy, this is a monumental moment.” The continuous low-frequency synth pad lingers beneath his words, maintaining the scene’s brooding tension while deliberately suppressing all diegetic Foley to keep the focus tightly on the narration and dialogue. The brisk pacing and deliberate framing guide the viewer’s attention seamlessly from the concealed contents of the bag to the ominous tool and finally to the character’s charged reaction, blending ironic commentary with a gritty, cinematic mood.","video_1_relative_path":"videos/e57ccfae696afc7a.mp4","video_2_relative_path":"videos/2d7e9b783d543e65.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_davinci/multitalker/multitalker_2/example.json::00000043","text_prompt":"A cinematic two-shot captures a sun-dappled, tree-lined park walkway bathed in the warm, golden light of late afternoon, framed on a 35mm lens at chest level to maintain an intimate, conversational perspective. A man in a dark charcoal suit jacket over an open-neck white shirt walks side-by-side with a woman in a black lace-trimmed sleeveless top, light-wash jeans, and a brown cross-body bag. Her wavy blonde hair catches the soft backlight as she listens attentively. The man speaks with an expressive, slightly sardonic General American accent, gesturing animatedly with his right hand as he remarks, \"Even if they’re now in a wheelchair, they remain optimistic and jovial.\"\n\nA hard cut shifts to a rear three-quarter tracking shot as the pair continues down the paved path, flanked by dense green hedges and a distant beige building. The man keeps talking, occasionally glancing sideways at the woman while raising both hands for emphasis. His tone grows lightly incredulous as he continues, \"If they’re a petty, miserable asshole, they’ll still be a petty, miserable asshole with a new Cadillac, a house, and a boat.\" The woman turns her head slightly toward him, her expression a blend of amusement and quiet reflection, while the gentle crunch of their footfalls blends into the minimal, music-free ambience.\n\nWithout changing the conversational rhythm, the scene cuts back to a frontal medium shot as they walk directly toward the viewer. The woman breaks into a broad, crinkling-eyed smile and leans into the philosophical exchange, her lighter, warmer voice cutting through the quiet afternoon air: \"So you’re saying that no matter how much luck or wealth comes their way, they’ll never truly be satisfied?\" The soft shadows and earthy color palette reinforce the reflective mood, leaving the camera to hold on their synchronized stroll as the dialogue fades into the dappled light.","video_1_relative_path":"videos/280a13519a158c80.mp4","video_2_relative_path":"videos/f08df5ffa379c0b3.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_davinci/multitalker/multitalker_3/example.json::00000095","text_prompt":"A moody, cyan-teal graded historical crime drama opens on a medium-wide steadicam glide tracking backward along the open-air wooden corridor of a traditional Chinese estate. The cool, diffused lighting casts gentle shadows beneath carved pillars and latticed windows, emphasizing muted earth tones against the atmospheric greenish cast. Walking side-by-side in a steady waist-up two-shot are a stocky man in a graphic white tee and black vest, wearing round blue-tinted sunglasses, and a leaner companion in a grey button-down and brown leather jacket. Their footsteps echo softly on the stone floor beneath a faint, low-frequency room-tone hum. A calm, measured male voice in standard Mandarin with a slight northern lilt begins, stating \"他不是我亲戚。\" As the corridor’s architectural details scroll past, the speaker maintains his forward gaze, occasionally flicking his eyes toward his companion for emphasis. His tone remains slightly accusatory as he continues, \"三十年前他曾是爷爷很欣赏的徒弟，可惜私心太重。\" The sparse soundscape isolates his words against the persistent ambient hum, heightening the tension. The listener on the right lowers his eyes briefly, then looks ahead with an unreadable expression, absorbing the revelation without breaking stride. The pair approaches a section where the roof opens onto a mist-veiled courtyard dotted with potted plants and distant tiled roofs, the camera preserving its smooth retreat. The speaker’s voice hardens with a firm, cautionary weight as he delivers the final line: \"倒斗的时候因为冥器害死同门。\" Both men continue walking without pause, striding deeper into the corridor as the scene settles into the cool, atmospheric hue, leaving the moral reckoning and multi-generational legacy of the clan hanging in the quiet, tension-filled air.","video_1_relative_path":"videos/3ab8b1f42adce72e.mp4","video_2_relative_path":"videos/018a36edbcafebc3.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_davinci/multitalker/multitalker_4/example.json::00000066","text_prompt":"A sitcom-style scene opens on a static medium two-shot, framed at eye level with a shallow depth of field that keeps a tall, dark-wood bookcase and a small stereo receiver softly blurred in the background. Warm, even three-point lighting and a palette of deep browns, muted greens, and neutral greys highlight the subjects in the foreground: two musicians seated at close distance. On the left, a woman in her thirties with shoulder-length curly brown hair and black-rimmed glasses wears a red top beneath a zip-up hoodie patterned with large yellow-green flowers, holding a violin upright in her lap with the bow resting across the strings. Opposite her, a man of similar age, also wearing black-rimmed glasses, a dark jacket, and a silver-cased wristwatch, cradles a full-size cello whose rich reddish-brown varnish catches the soft key light. She looks directly at him with an intent yet playfully teasing expression, and a lively, slightly sardonic female voice begins, stating, \"I thought I saw your pupils dilate when you looked at her, which, unless you’re a heroin addict, points to sexual attraction.\" As her final words land, a brief burst of canned studio laughter swells beneath the dialogue, peaking naturally before fading into the quiet room. The man remains silent, his hands relaxed on the instrument’s neck and body, offering only a faint, knowing smile as the camera holds steady, letting the warm tones of the polished wood and the subtle comedic pause linger in the air.","video_1_relative_path":"videos/70b0b88f396e4eb6.mp4","video_2_relative_path":"videos/b85c33858fdab0ca.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_davinci/multitalker/multitalker_5/example.json::00000000","text_prompt":"A static medium two-shot captures a brightly lit late-night talk-show set, framed against a stylized blue-and-purple city-skyline backdrop that glows softly behind a polished wooden desk and a plush red armchair. High-key studio lighting washes both subjects in even illumination, while subtle rim lights separate them from the defocused urban panorama. The scene opens with the audience cheering loudly and applauding with excited whoops that quickly settle into a warm murmur. Seated at the left, Barack Obama—wearing a black suit jacket over an open-collar white shirt—leans forward slightly with his hands resting on his knees, smiling toward the host. Conan O’Brien, positioned at the right behind the desk in a dark suit, light lavender shirt, and patterned brown-orange tie, turns to face Obama and begins speaking in a lively, upbeat American English delivery, his right hand lifting briefly as he acknowledges the crowd: “Thank you.”\n\nConan continues, gesturing with both hands for emphasis, remarking: “People in Chicago love having you here,” punctuating the thought with a small laugh that draws scattered chuckles and renewed applause from the crowd. Obama listens attentively, nodding once before leaning back into his chair to settle comfortably. He interjects with a brief, friendly acknowledgment: “Yeah,” followed by a relaxed, affirming delivery: “They’re nice. They’re nice. They’re nice people here.” Conan, still animated, responds enthusiastically: “They are wonderful. You’ve got a wonderful state here, and uh, it really shows,” before trailing off as the audience noise dwindles to a low room tone. The camera remains completely locked off throughout the exchange, holding the steady composition as Obama smiles appreciatively with his mouth closed and eyes fixed on the host. Surrounding details—a vintage black microphone, a clear snow globe containing a yellow figure, a turquoise-yellow mug, a green rotary telephone, and a small dark-blue speckled mug on a side table—sit free of any legible text or branding, reinforcing the cordial, lighthearted atmosphere of the amicable interaction as the shot holds without transition.","video_1_relative_path":"videos/b1d4949728595130.mp4","video_2_relative_path":"videos/c255b88d3d350860.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_davinci/multitalker/multitalker_5/example.json::00000042","text_prompt":"A steady medium two-shot at eye level frames an intimate late-night conversation in a dimly lit interior, rendered in a striking dual-tone palette. Warm red light washes over the left side of the frame while cool blue-purple spill from a large multi-paned window behind the characters illuminates the right, casting dramatic silhouettes against a dark night sky dotted with silhouetted trees and distant hills. The shallow depth of field keeps the background softly blurred, drawing focus to the two figures standing in the foreground: a woman with shoulder-length brown hair in a dark collared shirt, and a bearded man in a light button-down over a white T-shirt. Children’s drawings, including one with a bold yellow triangle, are taped to the wall beneath the window, grounding the space in a casual, creative atmosphere.\n\nThe man points at a white sheet of paper the woman holds toward him, his slightly higher-pitched North American voice carrying a curious, mildly amused tone as he asks, \"Why does it say Seb's?\" The woman lifts her gaze, meeting his eyes with a playful, confident smile as she replies, \"Because I think you should call it Seb's.\" The man reacts with mild surprise, eyebrows raised and mouth open in a short laugh-like exclamation, his questioning lilt cutting through the quiet room: \"What?\" She continues with a light chuckle, her friendly North American accent clear and teasing: \"Because no one’s gonna come to Chicken on a Stick.\" Still holding the paper, she tilts her head toward the hand-drawn logo—a circular emblem featuring \"SEB'S\" in thick, informal black marker strokes—and the man leans forward, extending his index finger toward the symbol. With a thoughtful, half-laughing tone, he asks, \"Is that a music note? Is it an apostrophe?\" The woman confirms softly, her steady voice affirming: \"Yes,\" leaving the moment suspended in the contrasting red and blue glow, underscored only by the quiet intimacy of their exchange.","video_1_relative_path":"videos/7bec9bdb45ff97bd.mp4","video_2_relative_path":"videos/77e3bb0c6c92e1e6.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_davinci/multitalker/multitalker_5/example.json::00000062","text_prompt":"A sun-drenched, narrow cobblestone street in a historic European quarter, bathed in the warm, golden-hour glow of late afternoon. Shot in a static medium two-shot with subtle handheld micro-movements for an intimate, documentary texture, the scene frames a man and a woman standing just outside a shopfront beneath a weathered wooden sign reading RESTAURANT. The man, a Caucasian male in his mid-thirties with short brown hair, wears a dark charcoal blazer over a pale collared shirt. He leans forward with a broad, appreciative smile, raising his right hand in an open-palmed gesture as he speaks in a warm, expressive baritone, stating, \"It’s really well written.\" Behind them, a metal rack brimming with colorful postcards leans against a tan stone wall, while distant traffic hums and faint pedestrian footsteps weave through the ambient city soundscape.\n\nThe woman, a Caucasian female in her early thirties with fair skin and blonde hair loosely tied back, wears a cream-textured cardigan over a dark top. She responds with a friendly, slightly self-effacing warmth, smiling, nodding, and briefly touching his forearm before replying in a clear, polite mezzo-soprano, \"No, I really appreciate it. Thank you.\" He beams, adding with cheerful emphasis, \"Congratulations.\" As he begins to turn away, her cordial demeanor shifts to mild urgency. She reaches out, lightly grasping his left arm and calling out, \"Wait.\" He halts mid-step, pivots back with raised eyebrows, and asks in a puzzled, questioning tone, \"What?\" The camera holds steady on their surprised faces, capturing the sudden, intimate tension against the backdrop of a purple-clad passerby and a white car gliding past in the distance, all rendered in earthy neutrals punctuated by the vivid hues of the street life.","video_1_relative_path":"videos/43894521d42e66b3.mp4","video_2_relative_path":"videos/8b212adb30a898c6.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_davinci/multitalker/multitalker_6/example.json::00000098","text_prompt":"Cinematic documentary-style medium-wide shot, eye-level and static, captures a bright, sun-drenched rural worksite bathed in harsh, high-left sunlight that casts crisp shadows to the right and saturates the arid palette. Behind a simple wire fence in the lower foreground, two men stand side by side. The younger man on the left, with curly light-brown hair, wears a maroon zip-up hoodie over a pale pink collared shirt and khaki trousers, his hands clasped behind his back as he faces his companion. Beside him, the older man, balding with gray sides, sports a dark-blue baseball cap, a navy button-down shirt tucked into blue jeans with a black belt, and rests his hands lightly on his belt loops. Behind them, a weathered white semi-trailer dominates the mid-ground, its flank marked with faded, distressed lettering that reads “PIED PIPER” above “IRRIGATION SYSTEMS,” with a smaller matching sign leaning nearby against stacked wooden pallets, metal pipes, and orange farm equipment. Beyond the trailer, a single-story white prefabricated building and distant brown hills sit under a cloudless blue sky.\n\nA calm, low-pitched male voice begins, stating, “I’m thinking about getting in another line of work anyway.” The younger man listens attentively, maintaining steady eye contact without speaking. The older man continues in the same measured cadence, a hint of mild frustration coloring his tone as he adds, “All these foreigners coming over here, it’s really changing the area.” The recording remains clean and focused entirely on the dialogue, with no discernible ambient noise, emphasizing the quiet tension of economic and demographic shift in this sun-bleached landscape.","video_1_relative_path":"videos/009fe43fc8e0b422.mp4","video_2_relative_path":"videos/d64e532c122533fa.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_davinci/voiceover/voiceover_2/example.json::00000051","text_prompt":"Cinematic drama, widescreen 16:9, locked-off camera. The scene opens in a dimly lit bedroom at night, framing a medium close-up of a young man named Ulle lying on his back against a dark blue, vertically-tufted headboard. His head rests on two large white pillows while a grey duvet covers him to mid-chest, and a plain black T-shirt drapes over his shoulders. Soft, directional light from camera-left grazes the right side of his face, leaving the left half in shadow and carving out the deep fatigue in his eyes. The palette leans cool, dominated by navy and muted greys, punctuated only by the warm, intimate pools of light cast by two small cylindrical bedside lamps behind him. The room is hushed, filled with a faint room tone until a calm, measured male Mandarin narrator begins, stating “可就在今天，他忽然觉得好累。” Ulle’s eyelids flutter open, his gaze drifting upward and slightly rightward, his brows faintly knit as the weight of exhaustion settles over him.\n\nA straight cut widens to a static medium two-shot, revealing an older man sitting upright on the right side of the bed. He wears light-blue-and-white striped pajamas, his short greying hair catching the warm lamp light as he rests his hands gently near his lap. His posture is alert yet deeply concerned as he watches Ulle. In a low, hesitant voice, Ulle murmurs, “I don’t think I can face swimming today.” The older man answers immediately, his tone firm but kind, carrying quiet authority and reassurance: “Ulle, you’re not breaking your routine on the biggest day of your life.” As the words hang in the quiet room, Ulle’s eyes soften, and he exhales audibly, signaling reluctant acceptance. The lighting, framing, and cool color scheme remain unchanged, visually mirroring the shift from isolation to shared understanding.\n\nThe camera holds completely still on the two men in bed, allowing the emotional weight to rest entirely on their facial micro-expressions and vocal nuances. No music or extraneous noise intrudes; the sparse soundscape of their voices and Ulle’s quiet exhale underscores the moment’s intimacy. The chiaroscuro lighting continues to shape their faces against the receding darkness, heightening the contrast between Ulle’s profound weariness and the elder’s steadfast support. The scene closes on this quiet tableau, tension easing into a silent, compassionate resolution that lingers in the dim, atmospheric space.","video_1_relative_path":"videos/14d97bf450f422c4.mp4","video_2_relative_path":"videos/2f4bd61e8a8a389d.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_davinci/voiceover/voiceover_2/example.json::00000057","text_prompt":"Cinematic industrial thriller sequence, shot with a 35mm lens and a cool blue-gray palette, bathed in soft, low-contrast directional light. The frame opens on a dim, bluish-gray concrete floor inside a cramped, unfinished basement corridor, where a circular metal drain grate sits flush in the center. The toe of a dark work boot steps into view beside it, grounding the scene in tactile reality. A low, steady electronic drone hums beneath the ambience. A calm, neutral male Mandarin voice-over begins, stating, “Break the floor, clear the pipes below, and prepare for what comes next.” The camera pulls back to a slightly high-angled wide shot, revealing three men in dark work clothes navigating the utilitarian space. A bald man kneels on the left, leaning forward to press his right hand flat against the concrete near the grate, while a companion stands behind him, gesturing toward the floor. Against the rear wall, a red plastic bucket, a folded gray tarpaulin, and a small table holding assorted tools sit quietly in the subdued light.\n\nA tight close-up isolates the kneeling man’s hand as dust motes drift through the weak illumination, followed by a medium close-up of his face. He has a short buzz cut, fair skin, and wears a dark collared jacket over a gray T-shirt, his brow furrowed with intense concentration as he studies the ground. The ambient drone persists, underscoring the quiet tension of the inspection. A second male voice, deeper and speaking with a measured North American English accent, chimes in calmly: “This goes down four feet… and connects to the main pipe.” The scene holds on his focused expression, the cool industrial atmosphere and steady synthetic hum framing a moment of precise, cross-cultural technical assessment.","video_1_relative_path":"videos/516a98b398e9e4a7.mp4","video_2_relative_path":"videos/d7c49852322d6e64.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_davinci/voiceover/voiceover_3/example.json::00000023","text_prompt":"Classic Hollywood noir aesthetic, shot with a shallow depth of field and dramatic close-ups. Inside a vintage automobile at night, the camera looks forward from the rear seat toward the open right-rear door. Warm amber light spills from the cabin’s ceiling and dashboard, contrasting with the cool bluish-green glow of streetlamps filtering through rain-streaked windows. A young woman with light-brown hair pulled into a low ponytail sits on the right-hand side of the back bench, wearing a pale trench coat over a white collared shirt. Her head is bowed, eyes lowered, and lips pressed in a restrained line that radiates melancholy and resignation. Outside, a man in a beige trench coat and dark trousers steps up to the doorway, his posture immediately establishing a tense power imbalance. A calm, neutral male Mandarin voice-over begins, stating “随后对霍莉说。” as the quiet hum of rain and the soft creak of the car door set a pensive mood.\n\nThe man leans farther into the vehicle, gripping the door frame with his left hand while his right hand rests near his hip. His face is tense, brows knit, and mouth opening as he begins to speak. A soft orchestral underscore fades in beneath the scene, sustained strings and faint piano arpeggios weaving through the nocturnal atmosphere as blurred city lights streak horizontally across the glass. The shot tightens into a dramatic close-up of his face framed by the open door, his blue eyes locking onto the unseen passenger. His expression shifts from stern to a brittle, almost mocking smile as a strained male voice with a slight Germanic inflection …: “You know what’s wrong with you, Miss Whoever-you-are?” The woman remains perfectly motionless, still gazing downward with unchanged features. The music swells subtly under his words before holding steady, his final syllable hanging in the damp air as the orchestral bed continues for a brief, lingering beat before fading out.","video_1_relative_path":"videos/325b89ca7e7e6b7d.mp4","video_2_relative_path":"videos/d336f12d8d9a2230.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/instruments/instruments_1/example.json::00000041","text_prompt":"A fixed medium-close shot captures a quiet studio space, where soft directional lighting isolates a seated guitarist and his light-topped acoustic instrument against a dim, distraction-free background. The performer, dressed in a grey quarter-zip sweatshirt and dark jeans, sits upright with the guitar resting comfortably on his right thigh. His right hand immediately launches into a fluid fingerstyle pattern, thumb anchoring a steady alternating-bass line on the lower strings while the index and middle fingers articulate a bright, pentatonic melody on the treble strings. The camera holds steady as the tempo settles at a moderate ninety-five to one-hundred beats per minute, the arpeggiated figure rising gently before resolving downward in a warm, wooden resonance. As the passage unfolds, the right hand shifts into a denser, more rhythmic texture, weaving accented strums with syncopated melodic fragments that swell in volume and drive the phrase forward. The left hand mirrors this motion with precise fretting, executing smooth hammer-ons and pull-offs that create subtle pitch glides along the neck, while the intimate close-mic recording captures every crisp string attack, sympathetic resonance, and the faint, natural squeak of fingers shifting positions.\n\nThe final section begins with a quick descending run led by the ring finger, followed by a sustained low bass note held under the fading melody. The left hand settles into a root-position chord shape, thumb pressing the bass string while the other fingers relax, allowing the dynamics to taper off gradually. The right hand’s motion softens, reducing pluck intensity until only a single, delicate high note rings out against the quiet backdrop. The performer’s hands remain still as the instrument’s natural decay carries the final chord into silence, the warm overtones and balanced midrange filling the intimate space before fading completely without a trace of ambient noise or abrupt cutoff.","video_1_relative_path":"videos/901a37289acb7f85.mp4","video_2_relative_path":"videos/d879fb47d774d5b4.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/instruments/instruments_2/example.json::00000006","text_prompt":"Cinematic close-up, fixed medium-close framing, neutral even lighting, and a clean, uncluttered palette establish an intimate performance space. A young woman stands upright with relaxed shoulders, her face out of frame, holding a vibrant red hollow-body mandolin against her torso. The camera remains completely still, locked on her hands and the instrument’s ornate blue-green scroll, which catches the light without glare. Behind her, rows of black hard-shell instrument cases line the wall vertically, two Union Jack tags hanging from the handles. As the scene opens, a bright, metallic mandolin tone erupts at full volume, dry and close-miked with zero ambient reflection.\n\nHer right hand drives a relentless alternate-picking pattern with metal picks, striking the strings just above the soundhole in a crisp, rapid flurry that matches a brisk tempo. The left hand shifts swiftly up and down the fretboard, executing quick chord changes and smooth slides that trace a melodic contour rising in pitch before landing on two pronounced, accented peaks. The performance flows into a legato-like descending phrase, where the left hand glides downward and the right hand maintains its steady rhythm, softening the dynamic slightly as the notes connect. Every pick strike produces a sharp transient against the silent background, accompanied by the faint mechanical click of fingers lifting from the frets.\n\nThe sequence resolves on a single sustained tonic note, both hands holding their positions momentarily before the right hand rests lightly over the strings. The tone rings clearly, decaying naturally into absolute silence as the frame lingers on the static composition. No breaths, chair creaks, or environmental sounds break the quiet; the camera remains fixed on the performer’s relaxed posture and the instrument, leaving only the clean, resonant aftermath of a virtuosic showcase.","video_1_relative_path":"videos/d5f7cc5f34c16e96.mp4","video_2_relative_path":"videos/27fbe27ae5222ce7.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/instruments/instruments_2/example.json::00000088","text_prompt":"Cinematic solo performance study captured in a static medium shot at eye level, set against a pitch-black backdrop. A single overhead frontal spotlight isolates the musician, casting a sharp, gleaming reflection across the brass bell and U-shaped slide. The scene opens on a lone trombone player, his left hand anchored firmly on the main tubing near the mouthpiece while his right hand begins a deliberate, measured pull of the slide. A warm, resonant mid-register tone blooms instantly, establishing a steady legato line at a slow, unwavering tempo. The audio is clean and intimately close-miked, capturing the rich, mellow brass timbre with only a faint breath puff accompanying the initial attack. As the phrase unfolds, the melody traces a gentle arch, ascending stepwise before descending back toward its tonic center. The performer’s right hand glides smoothly outward, then reverses direction, synchronizing the slide’s extension and retraction with the continuous pitch flow. Fingers remain relaxed yet precise, making micro-adjustments to maintain embouchure consistency without visible strain. The sound swells marginally in brightness and volume as the slide reaches its maximum extension, the increased air pressure naturally amplifying the resonance. Articulation remains flawlessly smooth, with notes connecting seamlessly in a pure legato line, completely free of staccato or ornamentation.\n\nFollowing the melodic apex, the music gradually decrescendos as the slide retracts, shortening the tubing and lowering the pitch. The performer eases his embouchure and leans back slightly, allowing the volume to taper naturally into a soft sustain. Subtle diaphragmatic breaths are barely perceptible between phrases, underscoring the live, unedited nature of the capture. The final tones linger and fade into the acoustically dry space, mirroring the slide’s complete return to its resting position. The camera holds its fixed gaze, preserving the intimate focus on the precise interplay of physical motion and sonic expression as the performance concludes in quiet stillness.","video_1_relative_path":"videos/971fe11aa3e580d5.mp4","video_2_relative_path":"videos/813d9b0400b82e2d.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/movie/movie_2/example.json::00000049","text_prompt":"A hyper-realistic cinematic sequence opens on a bright, sunlit European city street, captured in a medium-wide static shot with harsh daylight and a warm, vivid palette. The camera frames a tranquil outdoor café patio furnished with rattan chairs and tables draped in red tablecloths. At the central table, a man and a woman sit in casual jackets, engaged in quiet conversation, while a uniformed waiter in a white coat stands motionless near the entrance. To the right, a black A-frame chalkboard menu displays handwritten French signage, and a black compact car and blue scooter rest along the curb. The soundscape begins with a low, peaceful urban hum, faint traffic, and the soft clinking of glassware, establishing a mood of serene everyday routine.\n\nSuddenly, a violent explosion detonates directly behind the café façade, sending a massive shockwave of debris outward. The fixed camera holds its position as the frame floods with chaotic motion: glass shards, wooden planks, cardboard boxes, metal fragments, and paper scatter in all directions. The audio swells instantly into a thunderous, multi-layered impact, dominated by a deep sub-bass boom, sharp crackling, high-frequency shattering, and metallic tearing. The seated man flinches and turns his head sharply toward the blast, releasing a quick, sharp exhale, while the woman recoils instinctively with a brief gasp and tightened shoulders. The waiter steps back abruptly, his retreat marked by the scuff of his shoes and the rustle of his uniform. Debris continues to rain down, bouncing off a green awning and striking the parked vehicles, causing them to jolt. Overturned chairs, shattered tabletops, and swirling dust clouds obscure the patio as the initial detonation decays into a dense cascade of tinkling glass, thudding wood, and rustling paper layered over a persistent low rumble. The scene settles into lingering echoes of falling fragments and the heavy stillness of dust hanging in the air, leaving the characters frozen in stunned silence against the backdrop of sudden, raw destruction.","video_1_relative_path":"videos/f4b68b0756b4fd64.mp4","video_2_relative_path":"videos/10a32ae8ed83a905.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/movie/movie_3/example.json::00000004","text_prompt":"A somber, cinematic wide shot framed through a tight circular vignette, evoking the constrained view of binoculars or a telescope, captures a solitary naval battleship gliding steadily from left to right across calm, dark waters. The overcast sky casts a pale yellow-gray wash over the scene, while a distant backdrop of low, densely forested hills anchors the horizon. The vessel’s dark gray silhouette is detailed with multiple gun turrets along its deck, and a tall smokestack exhales a thick plume of black smoke that drifts upward and slightly to the right. Gentle ripples trail in its wake, marking its steady forward motion, though the deck remains entirely empty of crew. The muted color palette and restricted field of view emphasize isolation and historical gravitas, setting a tone of quiet observation and maritime gravity.\n\nThe auditory landscape mirrors this restrained grandeur, opening immediately with a deep, sustained low-frequency drone that establishes a sense of looming scale and tension. Layered above the synth bass pad is a slow, mournful string melody, likely performed on cellos and violas, playing legato notes with subtle vibrato to create an epic yet melancholic atmosphere. The score is entirely non-diegetic, mixed prominently in the foreground without sharp transients or rhythmic percussion, and deliberately stripped of all environmental realism. There is no engine rumble, wind, or water splash; the absence of natural ambience and reverb suggests a studio-mixed composition rather than a location recording. The constant volume and sparse, minor-key harmony evoke solemnity, leaving the abstract, emotionally charged soundscape to carry the weight of the imagery. The sequence holds this unified mood of quiet anticipation, concluding abruptly while the ship’s forward motion and the brooding orchestral-electronic score remain suspended in mid-phrase.","video_1_relative_path":"videos/5ce228cfc851e67a.mp4","video_2_relative_path":"videos/cadec84367e7cc15.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/movie/movie_6/example.json::00000006","text_prompt":"Open in a claustrophobic, dimly lit interior, likely a tiled utility room or bathroom, with vertical wooden paneling lining the right wall. Low-key directional lighting carves deep shadows across the frame, establishing a high-contrast, intimate atmosphere. A steady handheld camera holds a medium close-up on two men locked in a brutal physical struggle. In the foreground, a figure in a light-colored long-sleeve shirt remains slightly out of focus as he grapples with a man in a dark suit jacket, white collared shirt, and grey trousers, his slicked-back hair and metallic wristwatch catching the sparse light. The suited man is driven backward against the wall, stumbling and losing his footing under the force of the push. The soundscape is stripped bare, dominated by the visceral intimacy of heavy breathing, strained grunts, fabric rustling, and the dull thuds of bodies colliding with wood and tile, all underscored by a faint, absorptive room tone that emphasizes the raw exertion.\n\nA hard cut violently shifts the scene to a sun-drenched street consumed by chaos and fire. Orange and yellow flames lick the sky, casting an infernal glow over thick plumes of black smoke and multiple burning vehicles in the background. A dense, surging crowd of predominantly male civilians charges forward, their faces twisted in aggression as they wield makeshift weapons like wooden sticks and batons. The camera adopts a slightly shaky handheld motion, panning to capture the scale of the unrest while tracking a central figure who has climbed atop a dust-caked car, arms raised triumphantly as he brandishes a curved blade. The audio erupts into a cacophony of raw, unstructured vocalizations—a massive roar of overlapping shouts and high-pitched cries—punctuated by sharp percussive impacts, metallic clangs, and the relentless crackling and roaring of the fire. Wind whispers faintly beneath the chaos, and the complete absence of music or dialogue leaves only the unfiltered, escalating fury of collective violence, mirroring the visual disorder with immersive, sensory intensity.","video_1_relative_path":"videos/0d3926c6bac68eeb.mp4","video_2_relative_path":"videos/242558e8185d0df9.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_10/example.json::00000059","text_prompt":"Cinematic sitcom interior, a locked-off medium shot at eye level captures a warmly lit apartment living room that doubles as a study, bathed in even three-point lighting that softens shadows and balances earthy wood tones against cool blue accents. The shallow depth of field keeps the focus sharply on two men seated on a reddish-brown leather couch while gently blurring the background clutter. Behind them, a tall wooden bookshelf overflows with scientific and medical textbooks, binders, and small gadgets, alongside a horizontal silver-and-black telescope. To the left, a compact stereo system sits beside a whiteboard scrawled with blue-marker physics equations and nuclear notations. Howard, positioned farther right, wears a navy zip-up jacket with red and light-blue shoulder panels over a red collared shirt, his dark bowl-cut hair framing a thoughtful face as he rests his chin on his right hand, index finger against his cheek. In the foreground, Leonard, clad in black-rimmed glasses, a brown T-shirt, and an olive-green jacket with a purple hood draped behind his neck, turns toward Howard with his lips already parted.\n\nLeonard begins speaking in a measured, slightly defensive tone, his eyebrows lifting as he shapes each syllable with controlled pacing. A calm, mid-range male voice delivers the line, \"Look, Howard, if I were to ask Leslie Winkle out, it would just be for dinner.\" Howard remains perfectly still, his gaze fixed and expression neutral but attentive, absorbing the words without a vocal reaction. Leonard continues, stressing his point by tightening his jaw and widening his eyes, his voice rising slightly on the key phrases as he adds, \"I’m not going to walk into the lab and ask her to strip naked.\" The camera never moves, holding the two-shot as Leonard lowers his head fractionally to conclude his thought. The audio environment is clean and intimate, capturing only the nuanced inflections of Leonard’s dialogue against a faint, unobtrusive studio room-tone, with no music or ambient distractions, leaving the scene suspended in quiet, character-driven tension.","video_1_relative_path":"videos/f4a5be8e5e8935e0.mp4","video_2_relative_path":"videos/71c3ece1b5ef6b2c.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_11/example.json::00000076","text_prompt":"In the style of a contemporary Japanese coming-of-age drama, the scene opens on a 16:9 static tripod shot at eye level, framed medium-wide and bathed in soft, overcast daylight that casts even, shadow-free illumination across a quiet alleyway dominated by a closed light-grey metal roll-up door set into a concrete-and-brick wall. A dark security camera sits high on the left pillar. Two young East Asian men stand side by side, both wearing matching royal-blue school blazers with small gold star-shaped lapel pins and crisp white shirts. The man on the left keeps his right hand tucked into his trouser pocket and wears a white belt, his gaze fixed forward with a neutral expression. The man on the right holds a black briefcase under his left arm, wears a dark tie, and turns slightly toward his companion. A calm, mildly teasing male Japanese voice begins, raising his eyebrows as he states, \"Don’t you already know?\" He pauses briefly, glancing down before offering a soft, thoughtful breath. Leaning in with a conspiratorial smile, he gestures lightly with his open right palm toward his friend and continues, \"Ah, doesn’t Riko-san secretly like Mitsubashi?\" The man on the left finally shifts his eyes to his companion, his eyebrows lifting slightly as he processes the remark, though he remains silent. The background stays still and virtually silent, with clean mono audio emphasizing the clarity of the dialogue against the muted blues of the uniforms and the cool greys of the wall. The moderate depth of field keeps both subjects and the immediate surroundings in sharp focus, underscoring the quiet, conversational intimacy of the moment.","video_1_relative_path":"videos/95afd731f73d8b3e.mp4","video_2_relative_path":"videos/07804f68c33249e4.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_12/example.json::00000094","text_prompt":"Widescreen 16:9 cinematic shot, cool-white fluorescent lighting casting minimal shadows across a clean, modern hallway with warm wood tones and a glossy reflective floor. A static camera with shallow depth of field isolates a young man in an open white button-down over a white T-shirt printed with a large black graphic of a stylized face and the words \"VERSACE JEANS COUTURE.\" He stands facing the lens, clutching his right chest with his left hand while scratching the base of his neck with his right. His brows are knit and his mouth hangs slightly open, caught in a startled reaction as he turns toward an unseen companion whose back—clad in a white short-sleeved shirt with a thin black strap—is visible in the foreground. A tense, questioning male Mandarin voice begins, stating \"到底什么庆典啊？\" (\"What kind of celebration is it?\").\n\nThe hushed, hard-surfaced silence amplifies his rising agitation. He drops his scratching hand, leans forward, and his eyes widen as his jaw tightens. A strained, impatient male Mandarin voice snaps, \"哎呀，废话真多，再晚就来不及了。\" (\"Stop talking nonsense; if we’re late we’ll miss it.\"). Still breathing heavily, he finishes the thought with a curt, staccato command, \"走走走！\" (\"Go, go, go!\"), while pivoting his body away from the reflective surface and toward the corridor exit. His right arm swings outward, briefly catching the light as he begins to move.\n\nHe strides past the camera, his shoulder brushing the lens edge and momentarily filling the frame before disappearing off-screen, accompanied only by the faint rustle of fabric. For a split second, the hallway remains empty, overhead lights shimmering on the polished floor, leaving the scene abruptly unresolved but charged with lingering urgency. The deliberate lack of background music or diegetic sound ensures every syllable and breath remains sharply focused on his performance, while the cool, modern palette holds steady in the quiet aftermath.","video_1_relative_path":"videos/efaa3ed068950e05.mp4","video_2_relative_path":"videos/cc2290127b1f28db.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_3/example.json::00000041","text_prompt":"A late-afternoon riverside promenade glows in warm, golden sunlight as a smooth backward tracking shot holds a balanced medium two-shot of a woman and a man walking slowly toward the lens. The woman, fair-skinned with shoulder-length wavy blonde hair, wears a black sleeveless top with lace trim and carries a brown cross-body bag, while her companion sports light-brown hair, a short beard, and a dark blazer over a pale patterned shirt. Behind them, a calm river glints beneath a stone bridge and leafy trees lining the opposite bank, with a white-and-yellow sightseeing boat marked “PARIS CRUISE” moored quietly at the left edge. The shallow depth of field softly blurs the distant architecture, drawing focus to their faces as a woman with a light French accent, her tone earnest yet tinged with resignation, states, “For the same exact reason.” A man with a calm American accent, replying with gentle curiosity, asks: “What reason is that?”\n\nMaintaining their steady pace, the woman continues without pause, her voice gaining reflective intensity as she gestures subtly with one hand. She explains, “Well, all couples expect that after a few years of living together, the passion and that consuming desire will remain exactly as they were in the beginning.” Her expression shifts between seriousness and wistful melancholy, while the man listens attentively, nodding once with a faint smile of understanding. Sunlight catches the strands of her hair, casting soft highlights and stretching long shadows across the paved path, where distant pedestrians ascend stone steps near a small monument on the right. A low-level urban ambience of distant traffic rumble and faint crowd murmur underscores the scene without overpowering their voices, weaving a contemplative, intimate mood that lingers as the pair continue walking, their philosophical exchange about enduring love and settled routine left beautifully unresolved against the tranquil Parisian backdrop.","video_1_relative_path":"videos/249458c6b72728b0.mp4","video_2_relative_path":"videos/910e71b77fcceb51.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_3/example.json::00000060","text_prompt":"A locked-off medium shot in a traditional Chinese historical drama, rendered in muted earth tones of dark greens, blacks, and browns with gold accents on carved pillars, captures an ornately decorated hall bathed in soft, even daylight filtering through high windows. Two pale wooden birdcages hang from the ceiling beams, and a framed ink-wash painting rests against the far wall. The camera maintains a moderate depth of field, keeping both principal figures sharply focused while softly rendering the background. An older man with grey hair tied in a neat topknot stands slightly left of center, wearing a dark green robe with a V-neck collar. He faces a younger man, visible only from behind and to the right, who wears a tall black official hat and a dark patterned robe. The older man begins speaking in a calm but slightly disdainful Mandarin tone, stating, “领队的说是姓邓，是个主簿。” He lifts his head, eyes narrowing in mild contempt, and releases his hands to lower them briefly before raising his right hand, palm up, in a small dismissive gesture. He utters a sharp, scornful scoff. After a brief pause, he tilts his head back, mouth parting as if to speak again, but instead exhales a soft, weary sigh that blends seamlessly with the persistent, diegetic chorus of cicadas underscoring the scene. He slowly returns his gaze forward, lowers his hand, and settles into a neutral stance with his hands clasped once more, eyes half-closed as he weighs his thoughts. The younger man remains completely motionless throughout, listening attentively. The absence of music and the steady, natural lighting reinforce a grounded, contemplative atmosphere, emphasizing the subtle social hierarchy and quiet tension between the two figures.","video_1_relative_path":"videos/1d936c56443e80a5.mp4","video_2_relative_path":"videos/d5a872e3409a7d1e.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_5/example.json::00000091","text_prompt":"A sun-drenched European cobblestone street unfolds in a smooth backward tracking shot, maintaining a consistent medium distance that fosters intimacy while revealing the passing background. Bathed in even midday light filtered through tree foliage, the scene leans into warm earth tones—cream, olive green, and beige—contrasting subtly against the grey stones and muted façades to establish a relaxed, romantic atmosphere. The camera follows a man in his early thirties, wearing a dark green blazer over an off-white button-down, and a woman in her late twenties with loosely tied blonde hair, a cream textured jacket, and a brown shoulder bag as they stroll side by side toward the lens. Light urban ambience, including a distant traffic hum, faint birdsong, and soft footfalls, underscores their unhurried conversation. The woman glances down at her hands before meeting his gaze, her earnest yet slightly self-conscious tone carrying the words, “Imagine, I mean, I had to read it twice actually.” The man turns his head, eyebrows raised in mild surprise, and answers with warm curiosity, “Yeah?” She nods once, maintaining steady eye contact, and replies softly, “Yeah.” Both share a faint smile as pedestrians drift past in the background, including a jogger in a white tank top and a couple walking in the opposite direction.\n\nContinuing forward, the man leans slightly toward her, his inviting tone shifting as he begins, “Come see for yourself.” Just as his sentence completes, a second, lower-pitched male voice cuts in from nearby, playfully echoing, “Come see, come see…” The interjection sounds like a casual beckoning from the street, overlapping naturally with the steady ambient city noise. The camera keeps tracking their movement along the sun-dappled pavement, the abrupt cutoff of the exchange leaving a quiet narrative tension that implies continuation beyond the moment. Natural daylight provides soft shadows, while the realistic soundscape of low-level traffic and occasional bird chirps grounds the scene in authenticity, reinforcing the intimate, unhurried rhythm of their walk.","video_1_relative_path":"videos/5a610d814777da66.mp4","video_2_relative_path":"videos/887facaac11c0770.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_5/example.json::00000096","text_prompt":"A tense crime-thriller scene unfolds in a dimly lit wooden shed, captured on a 35mm lens with high-contrast chiaroscuro lighting and a muted, earthy palette. A single warm key-light from camera left carves through the darkness, illuminating rough, dark-brown vertical planks while leaving the background in deep shadow. The sequence begins in an extreme close-up as two hands lift a light-green, square plastic case with rounded corners, twin recessed handles, and a translucent white disc on its front face. A soft thud and the faint rustle of clothing accompany the movement, underscored by a low, steady electronic hum that permeates the space. The camera eases back to a static, eye-level medium two-shot, revealing an older, bald Caucasian man with wire-rim glasses and a thin mustache, dressed in a black zip-front jacket over a grey-and-black plaid shirt. He holds the case at chest height, tilting it slightly toward his companion while speaking in a calm, measured, mid-low voice: “So why don’t we just steal it ourselves?” Behind him, a blue milk crate bearing faded block letters, a yellow smiley-face ball, and mounted bicycle handlebars sit quietly in the periphery.\n\nThe younger man, clad in a black beanie and a hoodie featuring a vivid embroidered skull patch, stands with squared shoulders, listening intently without a word. After a brief pause, the older man glances up, his eyebrows rising slightly as he offers a clipped, questioning “Yeah?” The younger man finally breaks his silence, his higher-pitched voice carrying a tentative yet eager curiosity as he asks, “How are we going to do that?” The camera holds steady on the composition, the warm light catching the sheen of the plastic case and the men’s faces, while the continuous electrical hum and the weight of their clandestine planning linger in the air.","video_1_relative_path":"videos/a720d9f011a15837.mp4","video_2_relative_path":"videos/c75912ff84583d60.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_6/example.json::00000041","text_prompt":"A tense, naturalistic domestic confrontation unfolds in a warmly lit apartment living room with terracotta-orange walls and crisp white trim, captured on a 35mm lens with soft, cinematic key lighting from camera left. A smooth lateral pan follows a young man in his late twenties as he storms into frame from the right, his black leather jacket and blue-and-white plaid shirt contrasting with the ambient interior glow. He is visibly agitated, brows furrowed and jaw clenched, thrusting his right index finger toward a woman standing near a built-in white shelving unit adorned with a red ceramic vase, a golden abstract sculpture, and a green glass bottle. His voice cuts sharply through the quiet room, loud and strained in a northern Mandarin accent, stating \"Hu Yifei, that’s a good question!\"\n\nThe camera settles into a stable waist-up two-shot, holding both characters in tight, expressive framing. The woman, also in her twenties, stands poised and unflinching, a green plaid coat draped over her shoulders, oversized silver hoops catching the light, and a structured blue handbag tucked under her arm. Her dark hair is swept into a neat updo with blunt bangs, and she meets his glare with steady, icy composure. The man continues his tirade, gesturing emphatically before sweeping his arm downward as he shouts, \"Why didn’t you tell me Xiaobo is already the mother of a six-month-old child?\" He abruptly drops his arm, tilts his head back, and sneers, \"Does it matter?\" The woman responds instantly, her voice low and clipped with precise enunciation, stating \"You despise single mothers.\" Without missing a beat, the man leans forward, points once more, and delivers a final, volume-peaking retort: \"No, I despise you!\" The scene is acoustically dry and intimate, stripped of music or distracting ambient noise, leaving only the raw, compressed clarity of their voices and the heavy silence that amplifies every syllable of their escalating moral clash.","video_1_relative_path":"videos/992aaff67c127b8a.mp4","video_2_relative_path":"videos/2c97cc422a906a81.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_8/example.json::00000057","text_prompt":"Cinematic historical vignette captured in a static wide shot from an elevated balcony perspective, looking straight down into a dimly lit traditional Chinese interior partially enclosed by a dark wooden railing with carved balusters. Warm amber light from numerous paper lanterns and wall sconces bathes the scene, casting soft pools of illumination against the deep browns of timber beams and roof tiles, while a faint, slow minor-key string melody led by cello and viola begins immediately and continues uninterrupted. Two women sit opposite each other at a low square table draped in a teal-blue cloth trimmed in gold, flanked symmetrically by potted pink-and-white blossoms and anchored by a traditional mountain landscape painting in the background. The woman on the left, dressed in flowing pale blue-white robes with her hair gathered high beneath a slender white ornament, turns slightly toward her companion and asks in a calm, gently inquisitive tone, “为何喜欢观星啊？” While the question hangs in the still air, the woman on the right, clad in muted sage-green layers and pinned with small golden hair accessories, keeps her gaze lowered to the tabletop with her hands resting lightly over one another. After a brief, reflective pause, she lifts her eyes fractionally, her voice soft and wistful as she replies, “因为繁星间，有我和家人的故事。” Her delivery is measured and tinged with nostalgia, accompanied by a minute nod and the almost imperceptible flex of her fingers atop her lap. The camera remains completely immobile, preserving the balanced composition and chiaroscuro contrast, while the dry, studio-clean dialogue cuts through the subdued, melancholic musical bed without any ambient room noise, cultivating a deeply intimate and contemplative atmosphere that lingers on themes of memory, lineage, and the quiet vastness of the stars.","video_1_relative_path":"videos/9c52c830e66124ce.mp4","video_2_relative_path":"videos/8f481a7d62b34675.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_9/example.json::00000057","text_prompt":"Cinematic medium-wide locked-off shot, eye-level, capturing a brightly lit hotel or office lobby bathed in even cool-white light that reflects sharply off a wall of metallic square panels. The composition is grounded in muted browns, grays, and deep navy blues, punctuated by a vivid red carpet and potted plants with small red flowers beside pale wooden stools. An older man in a brown jacket and dark trousers stands motionless on the left, while a younger security guard in a dark-blue uniform and cap with a gold emblem stands opposite him, clutching a black folder. A low, steady HVAC hum fills the minimalist soundscape. The guard begins to speak in a calm, business-like Mandarin tone, stating \"走吧，现在就走。\" (\"Let's go, leave now.\"), his voice mid-range, slightly brisk, and politely urgent. He turns toward the glass entrance doors, his rubber-soled footsteps echoing softly on the hard floor as he walks away. Glancing back over his shoulder, he addresses the older man: \"陈经理，我先走了。\" (\"Manager Chen, I'm leaving first.\"), his delivery respectful yet decisive. The older man remains still, watching him depart with a composed, contemplative expression. The guard reaches the threshold, places a hand lightly on the doorframe, and steps outside into an overcast street where wet pavement glistens under diffuse gray daylight. Through the glass, a muted city façade and a distant building sign are visible. The camera holds steady as the clip ends, emphasizing the quiet finality of the exchange and the guard’s time-sensitive departure against the older man’s silent acceptance.","video_1_relative_path":"videos/d9db40e0c77abdcc.mp4","video_2_relative_path":"videos/dd983d3576e67de4.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_9/example.json::00000061","text_prompt":"Cinematic medium-wide shot, fixed camera at the base of two parallel escalators cutting diagonally upward through a brightly lit modern shopping-mall atrium. Cool fluorescent lighting washes over white walls and glossy floors, contrasting with vibrant teal-and-red promotional graphics and pastel décor. On the right-hand escalator, an older man in a dark-blue jacket and brown shirt descends, balancing three paper shopping bags in his left hand and a grey tote over his shoulder. Beside him, a middle-aged woman in a long grey coat and turtleneck walks down, a beige handbag resting on her left arm and a white canvas tote bearing the word CHANEL in her right. Above them, an illuminated YRC sign glows on the second-floor storefront, while a younger man in a black hoodie printed with LONDON climbs the opposite escalator, moving away from the camera. Over the continuous low hum of ventilation and distant mall chatter, a calm, slightly raspy older male Mandarin voice begins, stating \"我听你大哥说，那美国的药可贵可贵的了。\" His tone is matter-of-fact and moderately loud, projecting across the open space.\n\nAs the conversation continues, the woman turns her head fractionally toward him, her expression softening into mild exasperation. A brighter, playful yet complaining middle-aged female Mandarin voice replies, \"爸，我腿都溜细了，你让我吃口行吗？\" The man’s shoulders relax as they near the foot of the escalator, a faint good-natured smile crossing his face, while the woman’s lips curl into a small smirk. The camera holds its static position, capturing the pair mid-stride in the bright retail environment, their lighthearted familial banter echoing against the backdrop of consumer signage and ambient shopping sounds.","video_1_relative_path":"videos/83d25edf6b617233.mp4","video_2_relative_path":"videos/839fe2523c5360a3.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_9/example.json::00000082","text_prompt":"Cinematic night scene, framed in a locked-off medium two-shot at eye level with a shallow depth of field, set on a wet city promenade where overhead street-lamps cast warm amber highlights and soft circular bokeh against a deep blue-black backdrop, their reflections shimmering across the glistening pavement. A young woman with long, wavy blonde hair and a red-and-yellow plaid flannel shirt walks sharply in focus beside a young man with short brown hair, light stubble, and a black leather jacket over a grey tee. They move toward the camera at an easy pace, their faint footsteps audible beneath the ambient rustle of clothing. The man initially keeps his right arm draped around her shoulders as they walk, their bodies swaying gently with each step. A bright, playful female voice with a North American accent begins, stating, \"The attention wasn’t focused on him.\"\n\nThe man releases her shoulder and clasps both of her hands between them, leaning slightly forward with a half-smile that blends mock admonishment with affection. A mid-range male voice with a North American accent carries a steady, playful rhythm as he says, \"All right, listen. This woman robs you blind, okay?\" The woman’s eyes crinkle as she grins, clearly amused by his earnest delivery. Still holding her hands, he begins another comparison, his tone shifting to amused storytelling: \"You were like a little boy walking past an ice cream shop…\" Warm light flickers across their faces as the shallow depth of field isolates them from the blurred background, framing the exchange as affectionate ribbing rather than serious criticism. The moment hangs in playful intimacy, underscored only by their voices and the quiet rhythm of their walk.","video_1_relative_path":"videos/99ddc593eca37f9f.mp4","video_2_relative_path":"videos/56a0656d2fc9b3ea.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/physics/physics_2/example.json::00000025","text_prompt":"A fixed medium-wide shot captures a traditional lion dance performance in a sunlit urban alleyway, rendered in vivid daylight with soft, natural shadows that emphasize the rich textures of the scene. The frame is anchored by a cream-colored wall marked with dark stains, overhead utility wires, and a hanging green tarp, while a golden lion statue rests on a pillar to the right. Two performers, their legs visible beneath a richly detailed costume, command the center: a lion draped in green and gold fur with purple trim and an ornate head accented in red, orange, yellow, and purple. Balanced atop a pyramid of six cylindrical red poles decorated with white floral motifs, the lion executes precise, rhythmic lateral sways. Its front paws rest on the highest pole while its hind legs brace against the lower ones, muscles tensing and ears twitching beneath the fabric as the performers shift their weight to maintain balance. A tail flicks outward with each motion, mirroring the choreography of a living creature. The scene is driven entirely by a brisk, high-energy percussion ensemble that fills the acoustically dry, semi-open space. Bright metallic clangs, deep resonant drum thuds, and crisp woodblock snaps strike in a tight call-and-response pattern, perfectly synchronized with the lion’s movements. Each metallic strike coincides with the initiation of a sway, a low drum hit follows the dip in posture, and a sharp woodblock accent punctuates the peak of the motion, creating a seamless fusion of rhythm and physicality. In the background, a man in a black shirt and a child seated on a red scooter observe quietly from the far right, their presence adding a grounded, communal feel to the ritual. The environment remains free of wind, traffic, or crowd noise, leaving only the crisp, unadulterated percussion to carry the festive energy, evoking a moment of traditional precision and celebration frozen in a single, unbroken take.","video_1_relative_path":"videos/5282c62a514ba4b3.mp4","video_2_relative_path":"videos/fe523c17c66cd666.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/physics/physics_7/example.json::00000073","text_prompt":"Open on a static wide shot at night, framing a towering multi-level launch structure that anchors the left third of the composition. Rows of small yellow-orange lights trace its vertical beams and platforms, casting a steady, artificial glow against the darkness. The right two-thirds of the frame are consumed by an immense plume of dense smoke and steam, billowing upward and outward in turbulent swirls. The vapor glows deep red and orange from intense heat, with subtle internal flickers of brightness suggesting dynamic combustion. The foreground is nearly pitch black, punctuated only by a few faint white streetlamps at the far left edge, while a dark silhouette of treetops lines the lower-right horizon. The camera remains completely fixed, holding the composition as the exhaust mass expands and the thermal output visibly intensifies.\n\nFrom the very first frame, a powerful mechanical roar erupts, low-frequency and broadband, overwhelming the soundscape with sheer volume. The sound is continuous and relentless, carrying strong sub-bass energy, a midrange growl, and faint upper harmonics that hint at turbulent gas flow and structural vibration. There is no distinct rhythm or melody, only subtle internal fluctuations in pitch and texture that mirror the swirling plume above. The environment is acoustically stripped of wind, wildlife, or ambient hum, leaving the raw, earth-shaking intensity of the machinery as the sole auditory focus. Minimal reverb suggests an open-air setting heavily damped by surrounding terrain, keeping the sound tight and immediate. The scene sustains this unbroken, visceral immersion, building a mood of awe and primal tension before cutting abruptly to black, leaving only the memory of immense technological power.","video_1_relative_path":"videos/5b40ceb5e1e2bb84.mp4","video_2_relative_path":"videos/2973ee3d4b16c19a.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/podcast/podcast_1/example.json::00000074","text_prompt":"Cinematic documentary style, 35mm lens, high-contrast chiaroscuro lighting against a deep black background. A medium shot frames a dimly lit auditorium stage where focused spotlights carve out a sleek modern lectern with a metallic stand and red circular top. A middle-aged male presenter, wearing glasses and a dark long-sleeved shirt, stands slightly right of center. Behind him, a large curved screen displays a stark graph titled World GDP in trillion dollars against the year, spanning from eight thousand BC to two thousand AD. A vivid red line traces nearly flat along the zero baseline for millennia before shooting vertically near the modern era. As the presenter gestures toward the screen with his right hand, a calm, clear English voice states, “It looks like this.” The statement is immediately met with a burst of mixed audience laughter that fills the reverberant hall, grounding the scene in a lightly humorous, intellectually engaging atmosphere.\n\nThe camera cuts to a full-screen composition of the graph, eliminating the presenter to focus entirely on the visual data. The red line remains perfectly flat until just before the year two thousand, where it ascends sharply, visually emphasizing an exponential economic surge. A measured, explanatory English voice resumes, noting, “It’s a curious shape for a normal condition.” The audio remains pristine and centered, captured with professional microphone clarity and minimal echo, while the crowd’s residual chuckles fade naturally into the low-level hum of the auditorium’s ambient noise floor. Lighting stays consistent throughout, preserving the dramatic contrast between the flat historical baseline and the sudden vertical growth, maintaining a tone of quiet fascination and subtle wit.","video_1_relative_path":"videos/3c1080a053b9970e.mp4","video_2_relative_path":"videos/06e93b65e4961315.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/voiceover/voiceover_1/example.json::00000003","text_prompt":"A bleak, desaturated prison drama scene captured in cold green-gray tones under harsh overhead fluorescent lighting that casts sharp shadows across concrete floors and metal bars. The camera opens on a medium shot of a gaunt Caucasian prisoner with slicked-back dark hair, a thin goatee, and fresh red abrasions on his forehead and left cheek, wearing a plain white T-shirt that clings to his frame. Behind him, a loose semicircle of inmates in white tank tops and pale-blue uniforms mills quietly, their distant murmurs blending with the low electrical hum of the lights. A calm, neutral male Mandarin voice-over begins, stating, “He was the first to step forward, pointing at a Black man and declaring his challenge.” The camera executes a quick cut to a close-up profile of an older Caucasian guard in a dark short-sleeved uniform with epaulets and a silver star badge. His jaw is set, eyes narrowed as he watches the unfolding tension, with more inmates visible behind barred doors in the background.\n\nCutting back to a medium close-up, the injured prisoner lifts his chin defiantly, lips curling into a sneer. He tilts his head slightly toward a tall Black inmate standing just behind him, then thrusts his right index finger forward as he shouts in a rough, accented English voice, “Not that hot! You think that’s enough heat?” His delivery is loud, mocking, and edged with aggression. The surrounding men react visibly: one inmate in a blue uniform grins broadly and rests a hand on the Black prisoner’s shoulder, while another in a white sleeveless shirt smirks. The Black inmate himself remains stoic, shoulders squared but unmoving. The fluorescent glare catches the sweat on everyone’s skin, heightening the sense of stifling heat and raw confrontation. With no music to soften the moment, the scene lingers on the unresolved tension, the ambient crowd murmur and harsh lighting framing the standoff.","video_1_relative_path":"videos/b9329346e28e9329.mp4","video_2_relative_path":"videos/550ef36e9b914150.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/voiceover/voiceover_1/example.json::00000086","text_prompt":"A cinematic thriller sequence, captured in a medium close-up profile with low-key lighting and a desaturated blue-grey palette, opens in a dimly lit, narrow corridor. A young East Asian man stands in frame, wearing a dark suit jacket, crisp white shirt, and gold-rimmed rectangular glasses, his hair neatly combed back. The background wall fades into a soft blur of rows of red Chinese characters against a pale surface as a subtle camera push-in tightens the focus on his contemplative, slightly downcast expression. A calm, grave male Mandarin voice-over begins, stating, \"For the sake of profit, this law firm no longer has a place for idealists.\" Beneath his measured, neutral-to-serious delivery, a low-volume, tense electronic underscore with pulsing bass and sparse high synth notes establishes a restrained yet emotionally charged atmosphere.\n\nThe scene cuts abruptly to a second East Asian man standing motionless in a cool-toned underground parking garage, his dark suit, white shirt, and dark patterned tie contrasting with the green-painted floor and blurred concrete pillars illuminated by overhead fluorescent strips. He gazes ahead with a serious, resolute expression as the narrator continues seamlessly, \"He should leave too.\" The minimalist score sustains its subdued tension, mirroring the corporate unease and impending change. After a brief, deliberate pause, the voice-over delivers a final, slightly emphatic phrase, \"Set sail on the journey,\" marking a quiet transition toward new beginnings. The camera holds on the stark environment as the electronic pulse continues uninterrupted, leaving the frame suspended in a mood of unresolved anticipation and professional disillusionment.","video_1_relative_path":"videos/ecf057f5f7d83556.mp4","video_2_relative_path":"videos/1abd0d2c36b9e3b3.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/voiceover/voiceover_11/example.json::00000022","text_prompt":"Set on a rain-slicked Japanese street at night, the scene opens with a static, medium-wide tripod shot at eye level, framing the brightly lit storefront of a boxing gym and a stretch of wet sidewalk. High-contrast practical lighting spills from the gym’s interior, casting warm yellow highlights across the pavement and creating reflective pools that enhance the nocturnal atmosphere. The color palette is dominated by the deep blues and blacks of the night, punctuated by the warm interior glow and the red and blue punching bags visible through the glass. A vertical white banner bearing the bold Japanese characters “拳で世界をつらぬけ” flanks the doorway. A young man dressed in all-black athletic wear stands motionless near the entrance, holding a white plastic bag in his left hand, his posture upright but slightly tense as he gazes toward the left. Over the distant city hum and soft rainfall patter, a calm male Mandarin voice-over begins, stating \"But he called out to her.\"\n\nA woman wearing a loose brown jacket over dark trousers enters from the left, walking briskly past him with her long hair swaying. Just before she passes, the man raises his right hand slightly and calls out in a soft, slightly hesitant Tokyo accent: \"Wait a moment.\" The woman halts, pivots to face him, and answers politely in Japanese: \"Yes.\" Raindrops glisten on the pavement as they remain facing each other for a beat, the man’s expression reserved and his eyes fixed on hers. After a brief pause, he continues in a gentle, measured tone: \"Let’s go somewhere next time.\" The minimalist soundscape of steady rain and faint traffic rumble persists as they stand near the curb, the scene suspended in quiet anticipation under the warm glow of the gym lights.","video_1_relative_path":"videos/ae7518959b43f081.mp4","video_2_relative_path":"videos/7a36942a652b32e2.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/voiceover/voiceover_2/example.json::00000083","text_prompt":"A historical drama scene captured in a single locked-off medium shot, bathed in soft, diffuse daylight that filters through foliage to cast gentle highlights on silk and subtle shadows across a traditional Chinese courtyard framed by gray stone walls, a low rockery, and drooping willow branches. The color palette is dominated by muted greens, grays, and blacks, with gold embroidery on the central figure’s ornate black robe providing a sharp focal point. Center-frame stands a dignified official in a tall black hat bearing a small green gem, raising his left hand high to brandish a narrow white paper strip inscribed with dark calligraphy. Around him, roughly half a dozen men in muted green-gray robes and simple white cloth caps bow deeply in deference, their collective gasp and scattered laughter echoing through the semi-enclosed space.\n\nThe official suddenly thrusts his right index finger toward the kneeling group, his voice booming with triumphant scorn as he declares, “你现在知道什么叫画了啊？” The camera remains fixed, but the visual tension shifts to one subordinate in a lighter blue-green robe who stiffens, lifts his head, and recoils in visible shock, eyes widening and mouth agape. As the background murmur dissolves into uneasy silence, a smooth, documentary-style male voice begins, stating “而武状元手中为石榴姐所作的画，实际出自一位民间画师。” The official lowers his arm but keeps pointing, his expression stern, while the startled man clutches his chest and wipes his brow in distress. Other onlookers exchange anxious glances as the ambient sound drops to a faint room tone, and the scene holds on the frozen tableau of dramatic tension before the frame cuts to black.","video_1_relative_path":"videos/814b0adb98356ee1.mp4","video_2_relative_path":"videos/1c35382daea1a8ca.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/voiceover/voiceover_3/example.json::00000072","text_prompt":"A single, uninterrupted medium two-shot captures a warmly lit dining-living space bathed in soft yellow light from ceiling fixtures and a wall sconce. The muted earth-tone palette of beige curtains, brown wood, and a grey sofa frames a young woman on the left, her shoulder-length dark hair falling over a black zip-up jacket and dark turtleneck, and an older man on the right, dressed in a light-brown sweater layered over an orange collared shirt. Between them on the table sit a clear glass of water and a white bowl with chopsticks, grounding the intimate, domestic moment. Under a faint indoor room tone and the gentle swell of a subdued piano melody, the man turns slightly toward her. A calm, measured male Mandarin voice begins, stating \"It is time to let go.\" His mid-low, resonant tone carries a gentle concern as he speaks, while she keeps her gaze lowered, brows faintly knit, her hands clasped quietly near the bowl.\n\nHe maintains steady eye contact, his expression softening into paternal warmth as he continues in a mild, earnest tone: \"Of course, as your leader, and as your father’s close friend…\" His right hand lifts briefly in a small, outward gesture for emphasis before settling back onto the tabletop. The woman remains mostly still, lifting her eyes toward him only for a fleeting moment before looking down again, her expression tightening slightly as she exhales almost imperceptibly and her shoulders drop a fraction, absorbing his words. The ambient lighting casts subtle shadows that accentuate the quiet gravity of the exchange, while the shallow focus keeps the background décor softly blurred, ensuring all attention remains on their restrained interaction. As the piano melody continues its quiet rhythm beneath the lingering room tone, both characters hold their positions in the stillness, the contemplative atmosphere settling over the frame as the moment fades.","video_1_relative_path":"videos/3d407744577867c1.mp4","video_2_relative_path":"videos/5d0147fc713503cb.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/voiceover/voiceover_5/example.json::00000045","text_prompt":"A warmly lit, cluttered archive or storeroom sets the scene, its background densely packed with tall shelves stacked high with cardboard boxes and paper files. The camera holds a static medium close-up on a middle-aged man with dark, slightly wavy hair and a trimmed beard, wearing an open-neck plaid shirt in muted blues and browns. His face is tense, brows knitted and eyes wide as he leans forward, demanding an answer. To his right, the blurred shoulder and back of an unseen figure hint at a tense standoff. A tense, urgent male Mandarin voice cuts through the quiet indoor ambience, stating: “这人到底是不是家推老艾？” The shallow depth of field isolates him against the softly blurred, information-rich shelves, emphasizing the raw emotional tension of the moment.\n\nA straight cut reverses the angle to a matching medium close-up of the second participant, an older Caucasian man with short white hair and deep facial lines, dressed in a dark navy polo shirt trimmed with thin white piping. The camera remains static, now framing him over the first man’s shoulder. Responding in Persian, a measured male voice with a faintly reproachful tone replies: “فکر نمی‌کردم خودتو اینجوری اسیر بکنی.” The quiet indoor ambience continues without music or effects, and the frame holds steady on his reflective response, completing the brief emotional arc from sharp confrontation to quiet admonition.","video_1_relative_path":"videos/24234ecdcdc35632.mp4","video_2_relative_path":"videos/3ecc6c2b51ab8db0.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/voiceover/voiceover_6/example.json::00000043","text_prompt":"Cinematic documentary style, low-angle ground-level tracking lens, dim forest lighting shifting to bright coastal daylight, earthy brown and green palette transitioning to sunlit tones. The camera follows a pair of sturdy, dark-green rubber boots as they crunch through a thick carpet of dry foliage in a shaded forest, each step compressing brittle leaves into crisp rustling sounds that blend seamlessly with a soft, slow-tempo score of guzheng-like plucked strings and faint dizi flute phrases. Over this intimate soundscape, a calm male narrator with a standard Mandarin accent and measured, reflective delivery speaks, stating “Rao Changqing intends to leave it for his family.” The scene then cuts to bright daylight over an expansive tidal flat, maintaining the low perspective as blue-jean-clad legs and mud-splattered boots trudge through thick, gray-brown slush toward the horizon. The walker’s right hand grips a woven basket with light-brown wicker interlaced with darker geometric strips, while gentle wavelets lap against the shoreline and distant green hills frame the wide bay under a partly cloudy sky. Subtle splashes accompany each heavy step beneath the continuing traditional instrumental score, and the narrator’s voice returns with a gentle cadence, continuing “Whether relying on the mountains or the water,” as the camera holds on the rhythmic labor.\n\nFinally, the perspective shifts to a static, very wide shot of the same bay, where two tiny human figures—one standing, one crouched—dot the vast expanse of wet mudflats, emphasizing scale and solitude. Rolling green hills rise beyond shimmering water, and dense gray-white clouds drift across a pale blue sky, while the ambient music and soft lapping waves persist, leaving the viewer with a quiet sense of geographic context and the enduring rhythm of coastal livelihood.","video_1_relative_path":"videos/02d5a942f9c77b44.mp4","video_2_relative_path":"videos/508b2d1b13f7ecde.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/voiceover/voiceover_7/example.json::00000053","text_prompt":"Cinematic food documentary style, shot on a macro lens with diffuse window lighting and a naturalistic palette of whites, beiges, and muted greens contrasted by vivid orange-brown shrimp roe and deep blue bowl trim. The sequence opens with a bright, evenly lit top-down close-up of a white ceramic bowl resting on a pale wooden tabletop. Inside, thin, straight noodles are submerged in a clear broth, with scattered green scallion pieces floating near a generous, glistening mound of coarse golden-brown shrimp roe. Soft traditional Chinese instrumental music, built around plucked zither-like strings and light percussion, begins immediately to establish a calm yet lively atmosphere. A calm, neutral male Mandarin voice-over begins, stating “虾子小刀面，正是芜湖酷热的苦夏给予当地人的最佳补偿。”\n\nThe camera cuts to an extreme macro view angled obliquely into the bowl as a pair of pale wooden chopsticks enters from frame right and plunges toward the shrimp roe. As they break through the oily crust, tiny reddish-orange grains burst apart in sharp detail against the translucent noodles beneath. Still in tight close-up, the chopsticks stir vigorously, causing the noodles to swirl and coat themselves in the orange-brown mixture while droplets of broth flick outward. Steam wafts upward, catching the soft key light and creating gentle highlights on the wet surfaces, while the shallow depth of field blurs the background into warm wood tones. The shot then shifts to a low-angle, almost under-the-surface perspective inside the liquid, where thick strands of noodle glide past the lens, some curling around it as they are lifted. Subtle ripples distort the light patterns across the broth, maintaining a consistently shallow focus that renders foreground strands crisp while distant ones dissolve into creamy bokeh. The background music maintains its moderate tempo, then both narration and music fade out together, leaving an appetizing, culturally rooted impression of regional pride.","video_1_relative_path":"videos/313d728f1ccb3111.mp4","video_2_relative_path":"videos/1da7c8a6db1029ac.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/voiceover/voiceover_9/example.json::00000016","text_prompt":"Cinematic sports drama sequence, captured with a static medium-wide lens and soft directional lighting over a muted, gritty palette. The scene opens in a modest boxing gym with white walls and a polished wooden floor illuminated by overhead fixtures. A group of men stand in a loose circle around an older, balding figure seated on a low bench at the center. He wears a black knit beanie, a dark zip-front jacket over a grey hoodie, and holds a small rectangular object in his right hand. His expression is stern as a calm, neutral Mandarin voice-over begins, stating \"他说道.\" Behind him, a man rests on wooden bleachers against a dark green wall, while a shirtless boxer in red trunks stands to the right, hands wrapped and listening intently. A partially visible sign on the far left wall reads \"DO NOT SPIT OR THROW GUM ON THE FLOOR.\" The space is quiet save for room ambience and the narrator’s bridge.\n\nA hard cut shifts to a tight close-up of the older man’s face, his lined features filling the frame while a shallow depth of field blurs the background. Soft, directional lighting casts mild shadows that accentuate his age lines as he speaks forcefully in English. His gravelly voice resonates with anger and disappointment: \"You had the talent to become a good fighter, and instead of that, you became a despicable debt-collecting thug.\" The camera stays locked off, maintaining focus on his emotional intensity as his brows furrow and jaw tightens. Beneath his words, a low, ominous orchestral underscore fades in, dominated by sustained low strings that swell slightly toward the end, heightening the tension without overpowering his accusatory tone. The clip concludes with his final syllable hanging in the reverberant gym space, leaving the weight of wasted potential and moral decline to settle over the silent room.","video_1_relative_path":"videos/877c5c97c6a721e0.mp4","video_2_relative_path":"videos/765ee4dc273218e5.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_davinci/multitalker/multitalker_3/example.json::00000086","text_prompt":"A medium-wide, static shot captures the interior of a warmly lit, cluttered antique shop, bathed in rich tungsten-like light that highlights the deep browns of wooden furniture and colorful textiles piled on shelves and tables. Three figures are arranged diagonally across the frame: on the left, an older woman with short blond hair wears a light-blue button-down shirt with red shoulder panels; in the center, a teenage boy with dark curly hair and a maroon T-shirt with white sleeve stripes stands behind a folding table crowded with glass jars, metal canisters, and a wooden birdhouse; on the right, a young girl with a high ponytail secured by a red scrunchie, dressed in a plaid shirt and pink trousers, is bent over a small object in her hands. The camera holds steady, keeping all three characters reasonably sharp while the background shelves blur slightly, focusing attention on their quiet interactions. A soft room-tone hiss fills the space as the older woman begins to speak, gesturing with both hands as if illustrating a bargaining strategy.\n\nWhile the boy reaches down to lift and examine a long green bottle or tube, turning it slowly in his hands, the woman continues her explanation, briefly glancing toward him before pivoting left to pick up a folded piece of fabric from a nearby stack. She maintains a calm, instructional tone with steady pacing and clear articulation, stating, \"Negotiating. You start high, they offer less, then you meet somewhere in the middle, leaves them feeling like, you know, they got a deal.\" The girl remains absorbed in her task, barely moving, while the boy keeps studying the green object, occasionally shifting his grip. The ambient soundscape remains minimal, anchored only by the gentle room tone and the quiet rustle of the fabric, preserving the nostalgic, lived-in atmosphere of the shop as the scene concludes.","video_1_relative_path":"videos/8766c668dedba7d1.mp4","video_2_relative_path":"videos/1f688d7ccf75693a.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_davinci/multitalker/multitalker_4/example.json::00000069","text_prompt":"A sitcom-style scene opens with a brightly lit, static medium-wide shot, captured on a single locked-off camera at eye level, framing a lived-in apartment living room and kitchen set from mid-thigh upward. On the left, Leonard Hofstadter stands frozen mid-stride, wearing dark-rimmed glasses, a green jacket over a purple hoodie and brown T-shirt, and grey pants. His mouth is slightly open in mild surprise as he looks toward his friend. On the right, Howard Wolowitz sits in a black office chair with armrests, dressed in a red turtleneck beneath a black polo shirt trimmed with blue-and-white stripes, light-grey jeans, and white socks pulled high over his shoes. He grips the edges of a closed silver laptop covered in colorful stickers, his elbows braced on his knees. The background features wooden kitchen cabinets, a stainless-steel refrigerator adorned with a spiral-galaxy photo and a Mini-Bites cereal box, a stove, and an open doorway revealing towels hanging in a bathroom. In the foreground, a cluttered coffee table holds take-out cups, cans, a bottle of hand sanitizer, a remote, and everyday detritus. The scene opens with a faint, high-pitched giggle from off-screen, immediately followed by a short burst of canned studio laughter that swells and fades into the warm, softly lit room. As the laughter subsides, Howard Wolowitz, speaking in a calm, mildly teasing American accent, turns his head slightly toward Leonard and states, \"Sounds like your neighbor's home.\" Leonard’s expression remains neutral-to-surprised, his eyebrows raised and lips parted as if ready to reply, while Howard relaxes back into his chair with his eyes forward. The camera holds completely still, maintaining the even, multi-camera lighting that casts soft shadows and highlights the muted greens, purples, and wood tones of the set. Leonard shifts his weight subtly but does not move away, and the scene lingers on the quiet, comedic beat. Ambient room tone remains low, with no additional sounds or music intruding, leaving the atmosphere grounded in the everyday reality of the apartment as the moment settles.","video_1_relative_path":"videos/f09843223bc60c4b.mp4","video_2_relative_path":"videos/0a01163520fd0e39.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_davinci/multitalker/multitalker_5/example.json::00000081","text_prompt":"A tense, dialogue-driven scene opens in a static medium close-up, eye-level perspective, with a shallow depth of field that isolates the focal point against a softly blurred background. The room is modest, its walls painted in warm, earthy reds and browns, illuminated by a single soft key light from camera right that casts gentle chiaroscuro shadows across the subjects. Two men sit side-by-side on a wooden bench. In the foreground to the left, an older man in his late fifties wears metal-rimmed glasses and a green-and-white vertically striped shirt; he remains slightly out of focus, angled toward his companion. To his right, occupying the frame’s sharper focus, sits a younger man in his early thirties with short brown hair, light stubble, and a black T-shirt featuring red shoulder panels and a small white graphic. A low, steady electronic hum fills the otherwise quiet ambience as the younger man inhales quietly, his lips parting to address the older man with a skeptical, confrontational tone.\n\nA measured, General American male voice begins, stating, \"So… you plan to ice Gonzo?\" The older man tilts his head minutely forward, his eyes tracking the speaker while remaining completely silent. The younger man holds the pause, his gaze intent, before drawing a quick breath and pressing on with a strained, urgent cadence: \"In the near future? Like soon.\" The camera holds steady on this quiet confrontation, the shallow focus keeping the background details muted while preserving the crisp detail of the younger man’s face and the older man’s watchful stillness. The scene closes on this suspended moment, the ambient hum persisting as the younger man’s mouth closes, leaving the unspoken weight of the question hanging in the warm, shadowed room.","video_1_relative_path":"videos/d3f895b3c440581a.mp4","video_2_relative_path":"videos/c985b8892600a53e.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_davinci/voiceover/voiceover_3/example.json::00000052","text_prompt":"Set in a rustic historical martial arts drama, the scene opens with a high-angle, medium-long shot of a quiet woodland clearing, where a palette of earthy browns and muted greens dominates the frame. Brown earth is scattered with dry leaves and twigs, and thick, gnarled tree roots curve across the foreground. An elderly man with long, greying hair tied back sits hunched beside the roots, clad in a dark, patched tunic that speaks of wear and travel. His posture radiates fatigue and deep contemplation as soft, natural daylight filters through an unseen canopy, casting gentle, mottled shadows. A calm, steady male narrator begins in clear Standard Mandarin, his baritone voice resonant and gently earnest, stating, “报答苏灿的恩情，老鬼庆也趁着苏灿熟睡之际，把自己的绝学睡梦罗汉拳传授给了他。” Beneath his words, a low-volume, slow-tempo instrumental bed dominated by a guzheng-like plucked string timbre and sustained strings establishes a wistful mood, while the deliberate absence of ambient forest sounds lends the moment a detached, storybook quality.\n\nA straight cut shifts to a static medium close-up framed from the chest up, showing the man now leaning against a massive tree trunk, his weather-beaten face and sparse, dishevelled hair filling the frame. He wears a loosely woven, striped shirt with patched sleeves and cradles a small bundle of pale straw or dried plant matter in his hands. His expression shifts between a faint, grateful smile and earnest concentration as his lips move in quiet sync with the off-screen narration, his eyes glancing down at the bundle before lifting briefly toward something off-screen right. The background remains softly blurred, revealing only dappled greenery and muted earth tones that reinforce the period ambiance. The subdued traditional score persists unchanged, wrapping the scene in a contemplative hush as the camera holds on the man’s quiet reverence, the steady pacing of the narration and the gentle string harmonies blending into a seamless, reflective tableau.","video_1_relative_path":"videos/c07fa25060796a69.mp4","video_2_relative_path":"videos/76798b5654b86bcb.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/instruments/instruments_1/example.json::00000024","text_prompt":"A cinematic solo performance unfolds in a static, low-angle medium shot, lens positioned parallel to the floor to frame a young man from the waist up alongside a large, glossy reddish-brown double bass. The scene is bathed in soft overhead illumination with a neutral color temperature, casting minimal shadows across a quiet, uncluttered indoor space with plain white walls. A faint electronic hiss lingers beneath the intimate ambience as he initiates a deliberate pizzicato pattern. His left hand rests steadily on the fretless fingerboard while his right thumb and index finger pluck in quick succession, producing a crisp, woody attack with immediate decay. Each note outlines a steady descending bass line at a moderate tempo, the performer’s torso remaining perfectly still as only his fingers articulate the rhythm with precise, percussive clarity.\n\nThe musical texture gradually thickens as he shifts into a slightly syncopated figure, his left hand gliding downward to press new pitches while his right hand alternates between two adjacent strings. Subtle variations in finger pressure introduce gentle dynamic swells, some attacks marginally louder than others, before a brief ascending run breaks the pattern. He momentarily pauses, allowing the resonance of the previous note to bloom in a perceptible rubato feel that contrasts with the even pulse. His eyes remain focused forward, expression neutral yet intensely concentrated. Approaching the conclusion, he settles into a final cadential gesture, striking two lower-register notes with increased force. His right hand applies firmer thumb pressure, causing the strings to vibrate vigorously and yielding a warm, woody fundamental with clear upper harmonics and a rounded sustain. The left hand releases tension on the fingerboard just as the final note fades, leaving only the natural decay and a momentary residual room tone before silence.","video_1_relative_path":"videos/01188b0c0f694fdd.mp4","video_2_relative_path":"videos/f63294f5b50e9d9d.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/instruments/instruments_3/example.json::00000009","text_prompt":"Cinematic, static eye-level shot in a bright, sunlit domestic interior, rendered with natural daylight and a shallow depth of field that softly blurs the background. The camera remains fixed, keeping the performer’s torso and hands in sharp focus while a large black condenser microphone on a boom arm anchors the left foreground. Behind them, a black electronic keyboard, a music stand with sheet music, a small desk fan, and an open doorway leading to kitchen cabinetry sit quietly in the periphery. The performer maintains an upright, relaxed posture with elbows tucked close to the body, holding a black B♭ clarinet vertically with thumbs supporting its weight. As the first notes emerge, the unwavering gaze locks onto the precise, economical motion of the fingers, each deliberate key press perfectly synchronized with the instrument’s warm, reedy tone.\n\nThe melody unfolds in a brisk, dance-like 4/4 rhythm at roughly 120 beats per minute, beginning in the middle register before stepping smoothly upward into a bright, legato ascent. The right hand accelerates through rapid sixteenth-note figures, driving the phrase toward a luminous peak around G4 and A4, while the left hand provides steady support. Volume swells subtly with the rising contour, then gradually softens as the line descends, the performer’s fingers mirroring the decrescendo with fluid, controlled releases. Occasional crisp staccato attacks punctuate the phrase beginnings, and faint mechanical key clicks weave through the fast passages without breaking the clean, intimate recording quality. The tone remains steady and focused, free of breath noise or room echo, highlighting a technically polished performance.\n\nAs the passage nears its conclusion, the melody settles back into the opening motif, the performer’s hands resetting to their initial positions with a brief, intentional pause between phrases. The final sustained note rings clearly before tapering off into a clean, natural cutoff, leaving the static frame undisturbed. Throughout the sequence, the visual focus never wavers from the instrument and the performer’s hands, emphasizing the seamless marriage of controlled embouchure, steady airflow, and practiced dexterity. The scene captures a moment of quiet musical precision, where every finger movement, dynamic shift, and resonant overtone aligns in a cohesive, expressive display of solo clarinet technique.","video_1_relative_path":"videos/5f1f319a2aac9a05.mp4","video_2_relative_path":"videos/2004298ca31b9565.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/movie/movie_2/example.json::00000094","text_prompt":"A post-apocalyptic desert survival scene unfolds under a harsh, direct midday sun, captured through a wide-angle lens and a low-angle tracking camera that glides near the ground to emphasize the gritty texture of the sand and the heavy, deliberate steps of a solitary traveler. Clad in worn, brownish-tan garments with frayed edges and thick, strapped armored leg guards, the figure advances across the arid expanse, dragging a large metallic tool or weapon whose dangling chains catch the bright light. The camera slowly tilts upward to reveal the walker’s torso as they move, their long shadows stretching behind them. In the distance, partially veiled by heat haze and drifting dust, a colossal multi-wheeled transport rig looms, its sand-caked treads and tattered fabric strips flapping in the dry wind.\n\nThe audio landscape is entirely diegetic, stripped of music or vocalization to amplify the raw realism of the environment. Each stride produces a rhythmic crunch of gravel and sand, punctuated by the intermittent metallic clink and rattle of the carried object swinging in sync with the traveler’s motion. A low, steady diesel engine rumble emanates from the distant vehicle, gradually swelling in amplitude as the figure draws nearer, while a constant, subtle wind hiss and the faint rustle of worn fabric weave through the air. The composition relies on muted earth tones and weathered textures to convey isolation and survival, leaving the narrative tension unresolved as the looming machinery and rising mechanical drone suggest an imminent, purposeful convergence.","video_1_relative_path":"videos/f75752db249f059f.mp4","video_2_relative_path":"videos/6c42e65216c09c8f.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_12/example.json::00000046","text_prompt":"Set in a tranquil bamboo grove bathed in diffused daylight, this ethereal period drama scene opens on a static medium-wide shot framed through softly blurred green leaves that create a natural vignette. The cool, muted palette of pale whites and verdant greens reinforces a mood of purity and introspection, while a shallow depth of field keeps the two central figures sharply defined against the softly blurred vertical trunks behind them. On the left stands a tall, motionless figure draped in a flowing white robe with light-blue trim, their face concealed by an unblemished white mask marked only by closed curved black lines for eyes and faint pink blush circles; long dark-brown hair is secured with a silver ornament. Beside them, a woman in layered mint-green robes over a patterned white undergarment stands with her hands clasped loosely before her, her elaborate up-do pinned with leaf-shaped silver accents and a small red bindi resting on her forehead. A gentle, melancholic instrumental score led by sustained strings and soft piano fades in at low volume, devoid of environmental ambience to focus entirely on the internal emotion of the moment.\n\nAs the music swells slightly with emotional weight, the woman lifts her gaze from a downward cast toward the masked companion, her lips moving in quiet sync with her measured, sorrow-tinged Mandarin voice-over, which states “当日割发离家，就是下定决心要割舍一切。我尊重她的决定。” She then lowers her eyes once more, leaving both figures frozen in solemn contemplation, the atmosphere suspended in quiet resolve and meditative stillness.","video_1_relative_path":"videos/0bf7b3b0d41157d0.mp4","video_2_relative_path":"videos/e889b74061a33d8d.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_5/example.json::00000033","text_prompt":"A static medium-wide shot captures a cramped, dimly lit basement laboratory bathed in chiaroscuro lighting, where a hanging incandescent bulb high in the rear left and a tall floor lamp with a white shade cast a soft cone of light across the center-right, leaving the surrounding walls and receding shelving swallowed in deep shadow. The palette is dominated by browns, muted greens, and blacks, reinforcing a clandestine atmosphere. In the foreground, a dark workbench is cluttered with glass beakers, clear drinking glasses, a metal canister, a roll of aluminum foil, pliers, and scattered tools. Seated at the left edge of the bench is an older, bald man in thin-rimmed glasses and a pale green-and-white vertically striped button-down over a white undershirt. He leans forward with his elbows on the table, his gaze fixed ahead with a stern, calculating expression. Opposite him, a younger man in a black T-shirt and a grey beanie pulled low over his forehead sits with his arms crossed over the back of an ornate, gold-patterned armchair, looking downward and to his left with brows knit in worry.\n\nA faint indoor hum underscores the heavy silence as a calm but tense baritone voice begins, stating \"We’ll be in the clear.\" The delivery is measured and almost reassuring, yet edged with apprehension. A hesitant, anxious male voice responds: \"Not if Tuco kills us first,\" his eyes flicking briefly toward his companion before returning to the floor to emphasize his doubt. The older man’s posture remains rigid, though a faint tightening of his jaw betrays a quiet concern. As the tension lingers, the younger man’s voice falters and he completes his thought: \"I don’t know if Tuco will track us down before we disappear.\" The camera holds steady on the two figures, the unbroken framing balancing the older man’s authority against the younger’s vulnerability, while the absence of music and the lingering ambient hum focus all attention on their unspoken dread and the unresolved danger closing in.","video_1_relative_path":"videos/28f0c9b39c35cf09.mp4","video_2_relative_path":"videos/5692d5e62cb017b2.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_8/example.json::00000080","text_prompt":"Cinematic late-night talk show interview, captured in a single fixed medium two-shot at eye level that frames both subjects from the waist up. On the left, Barack Obama sits in a red armchair wearing a black suit jacket and an open-neck white shirt, already smiling broadly with eyes crinkled in amusement. To the right, host Conan O’Brien leans forward behind a light-brown wooden desk adorned with a white star-and-meteor graphic, dressed in a dark suit, pale shirt, and patterned brown-gold tie. High-key studio lighting bathes both men in even, warm tones while a subtle backlight casts a soft rim around their shoulders, separating them from a softly blurred backdrop of stylized night-time city buildings glowing with cool blue LED points. Conan raises his right hand in an expressive gesture and begins speaking in an upbeat, playful tone, his Midwestern cadence rising with enthusiasm as he states, \"I want to say I’m a huge fan of your name.\"\n\nObama’s smile softens into attentive listening; he nods once, gestures outward with both hands, and rests them on his lap as Conan continues, \"Your name, you have the best name.\" Obama interjects calmly and amused, \"Barack Obama,\" his lips forming the phrase clearly. Conan immediately echoes the sentiment, then launches into a humorous anecdote, his delivery growing more animated with lifted eyebrows and a small chopping motion from his right hand. He continues, \"When I first heard it, I thought it might be something entirely different, but I was sure it was Irish the moment I heard it.\" Obama listens with a neutral but relaxed expression, occasionally blinking and shifting slightly in his seat, while a black microphone, a clear snow-globe-like ornament, and a small yellow-topped cylindrical container remain motionless on the desk. The studio lighting holds steady as the LED cityscape shimmers subtly, and the absence of music leaves only Conan’s voice and the faint, swelling ambience of audience laughter to punctuate the lighthearted exchange, filling the space just as the scene naturally concludes.","video_1_relative_path":"videos/fc7ae3812a5ae256.mp4","video_2_relative_path":"videos/7fbf81ee8e48f01c.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_9/example.json::00000017","text_prompt":"Cinematic medium shot, locked-off and eye-level, opens inside a warmly lit café or tea-room bathed in soft, diffuse daylight that blends with cozy interior tones. The color palette is dominated by earthy browns, muted beiges, and deep blacks, punctuated by the vivid yellow of neckerchiefs and green foliage. Two teenage girls in matching black sailor-style school uniforms sit side-by-side at a dark wooden table, their navy collars edged in white piping and bright yellow neckerchiefs tied in loose bows, small red name badges pinned to their left chests. In front of them stand two tall, curved glasses filled with a cloudy pale drink, each garnished with a lemon slice on the rim, a single cherry at the bottom, and a white straw, while a smaller empty tumbler rests near the girl on the left. As a faint café room tone hums in the air, an off-screen adult woman’s calm, confident Japanese voice begins to speak, her standard Tokyo accent crisp and mid-to-high pitched: \"お二人は転校早々、十人もの不良どもをやっつけたと聞きました。\" The girl on the right turns her head slightly toward the unseen speaker, listening attentively with her eyes lowered and lips closed, while the girl on the left keeps her gaze forward, brows faintly knit as she absorbs the words, her posture steady and respectful.\n\nThe woman’s voice continues, shifting to an encouraging tone with a slight smile audible in her diction as she delivers her next line in Japanese: \"あんたらなら、やつらを倒せると思って。\" The girl on the left lifts her chin, leans forward a fraction, and parts her lips, signaling her intent to respond, her expression tightening with quiet determination. Beside her, the girl on the right remains composed, watching her companion with steady eyes. The camera holds perfectly still, capturing the subtle micro-expressions and restrained body language that convey a shared sense of resolve against the softly shadowed backdrop. The scene lingers on this poised anticipation, the ambient café sounds fading into the weight of the unspoken challenge hanging in the warm, layered space.","video_1_relative_path":"videos/12524a7f26f69acb.mp4","video_2_relative_path":"videos/e3574ebb609852fb.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/music/music_2/example.json::00000001","text_prompt":"Cinematic close-up, bathed in warm late-afternoon sunlight that casts a glowing rim light around her hair and shoulders, reveals a young woman with long, light-brown hair standing in a softly blurred golden field of tall wheat. Shot steady and intimate, she wears a light blue sleeveless top and subtle makeup, her eyes mostly closed as she sings into a silver condenser microphone positioned directly before her. A calm, tender female voice delivers the line “Oh, sweet love of mine” in a breathy, legato phrasing with a gentle vibrato, perfectly synchronized with her expressive, joyful smile. The soundscape is pristine and studio-clean, anchored by a slow, finger-picked acoustic guitar playing wistful arpeggios at a relaxed tempo, while faint atmospheric pads swell softly beneath the melody, creating a serene and nostalgic atmosphere entirely free of environmental noise.\n\nThe frame abruptly widens to a medium waist-up shot, revealing the same performer now standing behind a red Nord Electro keyboard mounted on a black stand. Her hands, adorned with bracelets and rings, move fluidly across the keys as she shifts her focus from the microphone, which remains on its stand but angled away from her. The acoustic guitar rhythm continues seamlessly, supporting the vocalist as she sustains the final syllable of her phrase before letting it fade into a quiet, reflective silence. The sunlit field remains visible in the background, now slightly more in focus, while the camera holds steady on her performance, capturing the intimate, emotionally charged moment as the music lingers in a calm, unhurried cadence.","video_1_relative_path":"videos/5d2246b675e5f77c.mp4","video_2_relative_path":"videos/14260661d290262f.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/music/music_2/example.json::00000094","text_prompt":"Cinematic wide static shot from an audience perspective, looking up at a concert stage set within a dark, hazy venue. Cool blue-white light from overhead spotlights and a horizontal row of bright stage lamps behind the performers cuts through atmospheric smoke, casting the silhouetted heads and shoulders of foreground audience members into shadow. On stage, a five-piece rock band stands in a classic formation: two electric guitarists anchor the sides, a central figure steps slightly forward with an acoustic-electric guitar and sings into a microphone, a drummer sits behind a kit in the rear center, and a fifth guitarist occupies the far left edge. All wear dark clothing and remain largely still, communicating only through subtle head tilts, fretboard shifts, and rhythmic posture adjustments. The camera holds its fixed position as the lighting remains constant, emphasizing the immersive, unbroken nature of the live performance.\n\nThe audio opens mid-phrase with a clear, slightly raspy tenor voice delivering the line \"built to last, you’re in ruins,\" backed by a full, anthemic alternative rock arrangement. Driving kick and snare patterns lock with a steady bassline while layered electric guitars weave rhythm chords and melodic fills across a moderate-to-fast tempo. The mix places the vocals slightly forward, drenched in a spacious natural reverb that suggests a large concert hall, yet the soundscape remains entirely free of crowd noise, ambient room tone, or incidental foley. The mood is intense yet tightly controlled, blending the atmospheric stage lighting with a polished, emotionally charged musical groove to capture a cohesive snapshot of a professional live show.","video_1_relative_path":"videos/b23fe4a01bd94141.mp4","video_2_relative_path":"videos/f4205cdd8384157b.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/physics/physics_2/example.json::00000009","text_prompt":"A contemplative maritime scene unfolds on the open-air deck of a large vessel under bright, overcast daylight, captured through a handheld, slightly shaky medium-wide lens that lends a casual, observational intimacy. The frame is anchored by black-and-white striped lounge chairs in the foreground and a gray vertical trash receptacle with a circular opening near the center, while a wooden railing cuts horizontally across the midground. Beyond it, calm blue-gray water stretches toward a distant shoreline under a pale sky. A solitary figure stands just left of the trash can, back to the camera, dressed in a dark purple long-sleeved top, light blue jeans, and a white hood pulled snugly over their head. They remain mostly still, occasionally shifting their weight or making minor postural adjustments as they face the open sea, their quiet stance suggesting deep, unhurried observation rather than active engagement.\n\nThe scene’s stillness is abruptly shattered by a powerful, low-pitched ship horn blast that erupts immediately, its deep, resonant frequencies rolling across the deck with a rich harmonic tail and natural outdoor decay. The siren sustains for a few seconds before cutting off, leaving behind a profound silence broken only by the faintest whisper of wind through the rigging, the subtle groan of wooden deck boards, and the distant, rhythmic lapping of water against the hull. With no camera movement or cuts to follow, the visual composition holds its static, contemplative frame, emphasizing the vast emptiness and solitude of the maritime setting. The stark contrast between the lone, hooded observer and the expansive, tranquil seascape creates a meditative atmosphere, where the imposing maritime signal serves as a fleeting punctuation mark in an otherwise serene and introspective moment.","video_1_relative_path":"videos/53f6a5804ae66e6f.mp4","video_2_relative_path":"videos/69e394a0fb8f3ade.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/physics/physics_5/example.json::00000088","text_prompt":"Cinematic industrial realism, captured in a static close-up with shallow depth of field, opens in a workshop illuminated by the intense, incandescent glow of heated metal and cool ambient overheads. The camera holds steady on a worker’s forearms, clad in a dark short-sleeved shirt and thick reddish-brown leather gloves, a small dark tattoo visible just above the left wrist. Their hands grip heavy-duty tongs that clamp a rectangular bar of molten metal, radiating vivid orange-yellow heat against the shadowed surroundings. Behind them, slightly softened by focus, a light-gray wall features a decorative gold-framed mirror beside a white electrical panel, while a weathered wooden shelf holds scattered blocks and tools. Dominating the right side of the frame, a massive mechanical forging press lowers a black cylindrical ram onto a dark gray anvil base. With each powerful descent, the ram strikes the glowing bar, sending showers of bright sparks erupting outward and casting fleeting white-orange flashes across the space. The metal yields under pressure, its edges softening and elongating as it cools slightly between blows, while the worker subtly adjusts their grip to maintain control.\n\nThe audio landscape is entirely driven by the relentless, rhythmic cadence of mechanized forging. Each impact delivers a deep, resonant metallic clang that reverberates sharply through the hard-surfaced, concrete-walled room, immediately followed by the sharp crackle and high-pitched sizzle of superheated metal shedding oxidizing scale. As the ram retracts and pauses, the acoustic decay leaves a brief, ringing silence broken only by the faint scrape of tongs shifting and the low, continuous mechanical hum of surrounding industrial equipment. There is no music, no dialogue, and no ambient wind or traffic—only the hypnotic, percussive symphony of raw craftsmanship meeting modern precision. The scene captures a visceral moment of focused intensity, where the blinding heat of the steel, the echoing strikes, and the steady hands of the artisan converge into a seamless display of skilled execution.","video_1_relative_path":"videos/5da48a318f52f969.mp4","video_2_relative_path":"videos/ce88a2ad3080af3b.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/podcast/podcast_1/example.json::00000017","text_prompt":"A cinematic wide-angle shot opens in a vast, dimly lit auditorium, where cool ambient shadows contrast with a warm spotlight focused on a circular red carpet at center stage. An adult male speaker, dressed in a white collared shirt beneath a dark jacket and trousers, stands alone in the light while the surrounding audience sits in semi-darkness, a few holding up phones to record. To his left, bold red three-dimensional letters spelling “TED” rest on the stage floor, and behind him, a massive screen initially displays a front-facing close-up of him against a blue-striped backdrop. The atmosphere is stripped down and reverent, with only the clear, calm voice of the male presenter echoing slightly through the spacious hall, accompanied by no music or ambient noise. He speaks in a measured, reflective tone, stating, “Expanded access to food and literacy basically birthed our modern world.”\n\nAs his delivery continues, the projection behind him transitions smoothly: the blue stripes give way to vertical orange-brown panels, and the on-screen frame shifts to a side profile of the speaker. He gestures with his right hand, briefly raising it toward his chest before letting it fall, his pacing steady and conversational as he acknowledges the ecological toll of this progress. He adds, “Yeah, in the process, it’s wiped out hundreds of species and decimated the natural world.” The scene holds on this quiet moment of reflection, the subtle reverberation of his voice and faint inhalations between phrases carrying the entire emotional weight, while the camera remains static, preserving the intimate scale of the talk against the grand architecture of the hall.","video_1_relative_path":"videos/99e17b3c09813b5a.mp4","video_2_relative_path":"videos/0916b350b56fcba0.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/voiceover/voiceover_1/example.json::00000090","text_prompt":"A cinematic, emotionally charged close-up set in a dimly lit, rustic wooden study, rendered in muted browns and desaturated greens with a very shallow depth of field that blurs the background into vague outlines of furniture. A single, warm, flickering key light off-frame left sculpts the scene in chiaroscuro, leaving the surroundings in deep shadow while catching the moisture on the subject’s skin. In an extreme close-up on her right profile, a young woman with dark, slightly disheveled hair stares toward an unseen presence just off-frame right. Her eyes glisten and a single tear streaks down her cheek as a young woman with a high-pitched, quavering Southwestern Mandarin accent begins, her voice trembling and sorrowful: \"我好留着命赎罪。\" The camera holds steady, capturing only the faint room tone and the raw texture of her breath.\n\nWithout a cut, the frame subtly pushes in as her head dips lower and her shoulders sag under the weight of despair. She whispers the next words softly, almost pleading, yet laced with quiet anguish: \"好不好？\" The warm light continues to emphasize the glistening tears and the profound sorrow in her downcast gaze. Emotional intensity peaks as she lifts her head fractionally, her eyes widening in frustration before drooping again. Her breathing grows audible between phrases, and her voice cracks, rising in volume and pitch as she delivers her accusation with rapid, ragged delivery: \"为啥子看不出来你是个狗？\" The final syllables trail off into a sob-like exhale. She lowers her gaze, eyelids heavy and overwhelmed, as the camera holds steady for a brief beat before freezing on her tear-streaked face. The audio fades naturally with her last breath, leaving only the oppressive silence of the room to underscore the claustrophobic atmosphere of guilt and confrontation.","video_1_relative_path":"videos/5aaf491ace93b1e0.mp4","video_2_relative_path":"videos/e0afaa41dfa83452.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/voiceover/voiceover_4/example.json::00000049","text_prompt":"A tense maritime thriller unfolds through a gritty handheld lens, bathed initially in a cool, desaturated blue-grey palette that gives way to an acidic yellow-green cast. The sequence opens on a tight, slightly low-angle close-up of a dark-skinned man in his late twenties, his pale sleeveless undershirt damp with sweat and smeared with grime, a thin red abrasion cutting across the bridge of his nose. Out-of-focus green-grey concrete panels loom behind him in a confined industrial space, while a faint electronic hum vibrates through the soundtrack. A calm, neutral male Mandarin voice-over begins, stating “But he is a truly vicious and ruthless pirate.” The camera wavers imperceptibly, heightening the unease.\n\nA hard cut snaps to an extreme close-up of the same man’s right profile, his mouth wide open in a feral snarl, bloodshot eyes locked forward. He grips a black-and-yellow walkie-talkie and thrusts it toward his lips while a partially visible figure in a dark hooded jacket stands behind him, a faint circular orange-and-blue insignia marking the back of the hood. The lighting shifts to a harsh emergency glow, and the ambient hum persists. Suddenly, the man unleashes a guttural shout directly into the radio microphone, his voice cracking with rage and desperation as it reverberates off the metallic walls. … a strained male voice, speaking English with a non-native accent, shouts: “America, I will kill the hostage now!” The camera jolts minutely, tracking his aggressive lunge, while the low electronic drone underpins the sudden spike in vocal intensity before the scene cuts abruptly.","video_1_relative_path":"videos/a9bc15d56dd7d221.mp4","video_2_relative_path":"videos/0ac1165b5fe5759d.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/voiceover/voiceover_9/example.json::00000017","text_prompt":"Cinematic sports drama sequence, captured with a static medium-wide lens and soft directional lighting over a muted, gritty palette. The scene opens in a modest boxing gym with white walls and a polished wooden floor illuminated by overhead fixtures. A group of men stand in a loose circle around an older, balding figure seated on a low bench at the center. He wears a black knit beanie, a dark zip-front jacket over a grey hoodie, and holds a small rectangular object in his right hand. His expression is stern as a calm, neutral Mandarin voice-over begins, stating \"他说道.\" Behind him, a man rests on wooden bleachers against a dark green wall, while a shirtless boxer in red trunks stands to the right, hands wrapped and listening intently. A partially visible sign on the far left wall reads \"DO NOT SPIT OR THROW GUM ON THE FLOOR.\" The space is quiet save for room ambience and the narrator’s bridge.\n\nA hard cut shifts to a tight close-up of the older man’s face, his lined features filling the frame while a shallow depth of field blurs the background. Soft, directional lighting casts mild shadows that accentuate his age lines as he speaks forcefully in English. His gravelly voice resonates with anger and disappointment: \"You had the talent to become a good fighter, and instead of that, you became a despicable debt-collecting thug.\" The camera stays locked off, maintaining focus on his emotional intensity as his brows furrow and jaw tightens. Beneath his words, a low, ominous orchestral underscore fades in, dominated by sustained low strings that swell slightly toward the end, heightening the tension without overpowering his accusatory tone. The clip concludes with his final syllable hanging in the reverberant gym space, leaving the weight of wasted potential and moral decline to settle over the silent room.","video_1_relative_path":"videos/892e9158288636ef.mp4","video_2_relative_path":"videos/e409c7e548f4b7a5.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_davinci/multitalker/multitalker_1/example.json::00000009","text_prompt":"A bright, sun-lit Parisian plaza unfolds in a steady medium two-shot, captured on a 50mm lens with natural daylight casting soft, even illumination and gentle shadows across the scene. The camera glides smoothly along a cobblestone path bordered by low stone planters and leafy trees, keeping a man and woman framed centrally as they stroll side-by-side toward the lens. The man, with tousled brown hair, wears a dark charcoal-green blazer over an open-neck cream shirt, while the woman, her blonde hair tied back in a loose ponytail, wears a textured off-white jacket over a black top and carries a brown shoulder bag. Both smile warmly as they converse, their relaxed body language suggesting a comfortable, possibly romantic rapport. A warm, friendly female voice with a North American accent begins, stating \"You can sit down for hours and read. I love it.\" Her tone is inviting, underscored by the soft hum of distant city chatter and faint traffic that fills the air without masking their speech.\n\nAs they continue walking, the woman’s tone turns lightly amused, her eyebrows lifting slightly as she glances at her companion and adds, \"There are fleas, but you know, it’s all part of the experience...\" The man breaks into a broad, good-natured grin, tilting his head back and laughing softly. He replies in a relaxed, humorous male voice, \"I know. I think a cat slept on my head last night,\" raising a hand toward his own head for emphasis as his shoulders shake with laughter. The woman chuckles in response, her eyes crinkling with shared amusement. Behind them, parked bicycles, a wrought-iron fence, and a few pedestrians—including a bald passer-by in a striped polo carrying a red backpack—animate the background without distracting from the foreground. The muted earth tones of the foliage, stone, and their attire create a romantic, relaxed ambience, while the continuous tracking shot and natural lighting preserve the intimacy and forward motion of the moment, ending on the pair still smiling and conversing amid the lively Parisian street.","video_1_relative_path":"videos/bab98f1540282e53.mp4","video_2_relative_path":"videos/b23b4803e9287006.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_davinci/multitalker/multitalker_2/example.json::00000045","text_prompt":"A cinematic wide shot captures a quiet hilltop at dusk, framed by a locked-off camera and bathed in a cool violet-to-pink twilight palette that warms into practical lamplight. The scene opens behind two figures standing motionless on a gently sloping hilltop, framed by a tall white lamppost on the right that casts a warm pool of light onto the dark earth and low wooden posts, while a large, sprawling tree silhouettes against the sky on the left. Below them, a vast city glitters in scattered clusters across the valley, and the reflective mood is underscored by a slow, minor-key piano motif mixed low beneath a bed of nocturnal ambience—distant insect chirps and a barely audible breeze. The static framing emphasizes the expansive vista and the quiet spatial relationship between the characters and their surroundings.\n\nThe man, positioned slightly to the right of the woman, shifts his weight and takes a small step forward. A calm, low male voice tinged with mild resignation remarks, \"Not much to look at, huh?\" The woman remains still, her posture relaxed but attentive, before a soft, even female voice with a hint of dry understatement replies, \"I’ve seen better.\" After a brief pause, the man turns his head fractionally toward her and begins to walk slowly down the slope away from the camera, with the woman mirroring his movement. Their figures gradually recede and grow smaller, yet remain bathed in the lamplight’s warm glow as the piano phrase lingers and the quiet night sounds persist, carrying the scene to a gentle, uncut close.","video_1_relative_path":"videos/c50c99549d97e8f1.mp4","video_2_relative_path":"videos/54416738ed6a3e1c.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_davinci/multitalker/multitalker_3/example.json::00000061","text_prompt":"A locked-off medium-wide shot captures a warmly lit, rustic kitchen bathed in soft, intimate household lighting that highlights an earthy palette of olive greens, creams, browns, and muted yellows. A green-tiled island dominates the foreground, holding a woven wicker basket overflowing with bright oranges and red apples beside a folded beige cloth. To the left, Jesse, a young man in a blue-and-yellow striped beanie, black quilted vest over a white long-sleeved shirt, and patterned dark trousers, leans against the counter. His right hand is encased in a bulky tan-and-green splint that extends from his mid-forearm to his knuckles. With a sigh of exasperated resignation, he raises the injured hand in a dismissive half-wave and declares, “You know what? Count me out.” Behind the counter, the older, bald Walter, wearing glasses and an olive-green button-down shirt, calmly arranges the fruit, seemingly unfazed by the outburst. Without breaking the static frame, Jesse straightens, pivots away, and begins stepping toward the rear of the room, swinging his splinted hand outward for emphasis as he adds, “All right, I’m leaving town,” his tone edged with frustration yet casual.\n\nJesse continues walking past the island toward a decorative folding screen painted with rooster motifs and a small wine rack mounted above it, his voice weary but resolute as he mutters, “I’m moving to somewhere like Oregon, or maybe just anywhere else…” The warm overhead lighting casts soft shadows across the cream cabinetry and white range hood, while a framed picture rests quietly on the back wall. As he reaches the far side of the kitchen, Walter finally looks up fully, fixes him with a serious stare, and cuts through the quiet domesticity with firm, corrective authority, stating, “This is Jesse.” The scene holds on the sudden stillness: Jesse pauses by the screen, Walter’s gaze drops back to the fruit basket, and the ambient kitchen sounds fade into a tense, frozen tableau, emphasizing the conversational weight through performance alone.","video_1_relative_path":"videos/59b32c2dc6d1fddb.mp4","video_2_relative_path":"videos/844eb8af62e92b78.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_davinci/multitalker/multitalker_6/example.json::00000018","text_prompt":"A warm, naturalistic contemporary drama opens in a narrow, sun-drenched European alleyway paved with cobblestones, captured through a steady chest-level tracking shot that pulls backward as two young adults stroll toward the lens. Bathed in late-afternoon light that casts gentle shadows across beige stone walls, the scene holds a medium two-shot without cuts or zooms, preserving an intimate spatial continuity. On the left walks a fair-skinned woman with blonde hair tied in a loose ponytail, wearing a cream-colored textured jacket over a black top and a brown cross-body bag. Beside her, a young man with short light-brown hair and faint stubble wears a dark grey-green blazer over a subtly patterned off-white shirt. As they walk, soft rhythmic footsteps echo on the stone beneath them, accompanied by the low, distant hum of the city and the faint rustle of fabric as they gesture. The woman speaks first with a light, grateful tone, smiling as she says, \"Thanks. I just feel really, really lucky to be doing a job I like, you know?\" The man nods, offering a brief, mellow affirmation before his expression turns more thoughtful, his gaze dropping briefly before meeting hers again.\n\nAs they continue forward, the man raises both hands with palms open, his tone growing introspective as he furrows his brow and softens his eyes. He speaks earnestly, his voice carrying a reflective, slightly hesitant cadence: \"You know, I actually alternate in between thinking that everything is irrevocably screwed up and that things can still be salvaged.\" The woman listens quietly, her lips pressed into a contemplative half-smile as she absorbs his words. Behind them, the alley’s muted earth-tone architecture, wooden shutters, and window boxes overflowing with greenery and climbing pink flowers remain static, alongside a parked scooter resting against the wall. The absence of a musical score keeps the focus entirely on their nuanced exchange, the steady footfalls, and the subdued urban ambience, leaving the conversation suspended in a candid, everyday intimacy that feels like a natural continuation of a longer, unspoken narrative.","video_1_relative_path":"videos/1ed75e2289f74c6a.mp4","video_2_relative_path":"videos/8580fb4ff37962f3.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_davinci/voiceover/voiceover_3/example.json::00000026","text_prompt":"Crime-thriller aesthetic, static medium-wide shot, dim green-tinted interrogation room unfolds in high-contrast chiaroscuro that carves stark highlights on a dark metal table while swallowing the surrounding walls and floor in deep shadow. Seated at the near edge is an interrogator with short, slicked-back blond hair, clad in a dark business suit, white shirt, and patterned tie, an ID badge dangling from his lapel. He leans forward, elbows braced on the tabletop, eyes narrowed and jaw set, while two uniformed guards stand rigidly against the back wall, arms folded and faces half-obscured. To the left, a suspect sits on a low chair, head bowed and hands clasped, and across the table only the right side of a fourth figure’s torso—dark jacket over a yellow T-shirt—breaks the darkness. A calm, neutral male Mandarin voice-over begins, stating, \"The men sent over. He questions the two about why they killed Lao Mo,\" as a subdued electronic suspense bed pulses steadily beneath his measured delivery.\n\nThe interrogator straightens slightly, leaning back and tilting his head upward as if gathering force, his expression hardening before he abruptly snaps his gaze downward toward the seated men. His brows knit, nostrils flare, and he barks in a harsh, raised Mandarin tone: \"How could that possibly be allowed?\" The electronic underscore cuts off instantly, leaving a tense, ringing silence that amplifies the aggression. He holds his intense stare for a heartbeat, chest rising with the exertion of the shout, while the suspects and guards remain completely frozen in their subordination. The symmetrical framing and institutional green cast reinforce the grim power dynamics of this underworld confrontation, ending on a still, heavy note where only the lingering tension remains.","video_1_relative_path":"videos/bdcca545ba7d280d.mp4","video_2_relative_path":"videos/f41df99208607f97.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_davinci/voiceover/voiceover_3/example.json::00000045","text_prompt":"Open on a steady, locked-off medium close-up framed slightly from the left, capturing two men from mid-torso upward within a dimly lit interior that evokes a traditional Chinese household or small shrine. Warm reddish light spills from the left background, bathing the scene in a somber, mourning-toned glow that models their faces while leaving the surroundings in partial shadow. Behind them hangs a red vertical banner bearing gold characters, flanked by a glowing red lampshade on a dark wooden shelf to the left and a large polished wooden sphere in the right-rear. The older man, dressed in a high-collared black tunic with thinning grey-streaked hair and deep forehead wrinkles, rests his left arm supportively across the younger man’s shoulders. His expression is pained and deeply sympathetic as he looks down. Beside him, the younger man wears a black suit jacket over an open-collar white shirt and black-rimmed glasses, his gaze fixed on the floor with brows knit in quiet distress. A calm female narrator in Standard Mandarin begins, stating \"了解道生的家庭情况。\" Her measured voice is accompanied by a soft, sustained string underscore that establishes a subdued, melancholic atmosphere.\n\nWithout shifting the camera, the older man lifts his head slightly toward his companion and speaks in Cantonese, his tone gentle yet heavy with concern. He asks: \"道生哥，你令堂仲健在啊嘛？\" The younger man remains silent, still looking downward, but finally raises his head just enough to meet the elder’s gaze for a fleeting instant before lowering it again, his lips pressed together in restrained sorrow. The older man’s facial muscles tense with compassion, his eyes glistening subtly under the warm light. As the question hangs in the air, the string accompaniment fades imperceptibly, leaving only the quiet weight of the moment as the scene concludes on this static, emotionally charged tableau.","video_1_relative_path":"videos/95219ee5413e7c51.mp4","video_2_relative_path":"videos/c6e9767caf82b3a7.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_1/example.json::00000087","text_prompt":"A cinematic medium two-shot at eye level captures an intimate, lighthearted exchange between two young adults seated at a stylish urban bar, framed by a warm lounge palette where red spherical pendant lamps cast soft pools of light over a curved marble countertop glowing from under-lighting. The camera remains locked-off, keeping the focus on the characters against a darker backdrop lined with blue-purple illuminated shelves. On the left, a man with styled black hair wears a black leather jacket over a patterned shirt, cradling a green glass beer bottle. Beside him, a woman with long dark hair swept into an updo wears a fluffy white cardigan and large gold hoop earrings, holding a small brown paper-wrapped snack. A steady, mellow electronic track with a mid-tempo beat and synthesized bassline hums beneath a constant low murmur of crowd ambience, punctuated by the occasional soft clink of glassware and the subtle rustle of fabric as they shift.\n\nThe woman turns slightly toward the man, her expression bright as she states in Mandarin, “This drink’s on me.” The man reacts with a surprised smile, tilting his head and widening his eyes before cheerfully replying in Mandarin, “Wow, so generous.” He lifts the green bottle to his lips for a quick sip, then lowers it, his tone shifting to playful affection as he adds, “We’re friends, after all.” The woman laughs lightly, her shoulders shaking, and sets her snack down on the counter. She leans forward, resting her chin on her hand while watching him attentively, the gentle tap of the bottle against the marble grounding the moment in tactile realism. The man’s expression softens into mild curiosity; he straightens up, still holding his drink, and asks in a gently concerned Mandarin tone, “Yifei, something wrong?” She offers a brief, amused smile but says nothing further, her quiet gaze holding his as the lounge ambience and steady musical groove continue uninterrupted, preserving the casual, affectionate mood of the scene.","video_1_relative_path":"videos/dd85abc03494b6ce.mp4","video_2_relative_path":"videos/e0f8f29903f7b678.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_12/example.json::00000039","text_prompt":"Set in a brightly lit, modern living room rendered with saturated pastel colors, the scene opens on a single, steady medium-wide shot at eye level. Lavender side panels and a pink central wall are accented by soft vertical LED strips that bathe the background shelves in gentle light, while the acoustically dry studio space remains completely silent except for crisp dialogue and a sudden comedic laugh track. At center-right, a young man sits on a light beige sofa with his legs casually crossed, arms wrapped tightly around a vivid purple pillow pressed to his chest. He wears a dark brown polo shirt with yellow trim, loose blue jeans, black socks, and red-and-white sneakers, his gaze fixed slightly upward toward the woman beside him with a guarded yet faintly amused expression. Opposite him stands a young woman in an orange short-sleeved hoodie dress layered over a black top and knee-length leggings, barefoot on the polished wooden floor. She leans forward, palms braced on the sofa’s armrest, her torso angled toward him as her eyebrows lift and lips part. A calm, bright female Mandarin voice begins, stating \"你从小几根肚肠，我还不知道。\" Her delivery is clear and measured, each syllable articulated with playful emphasis.\n\nThe man responds almost immediately, his voice lower and deadpan, offering a brief, matter-of-fact reply that triggers a burst of canned audience laughter from off-screen. A low, flat male Mandarin voice replies: \"大肠小肠，一共两根.\" The laugh track swells quickly, peaks, then fades beneath the continuing visual tension between the two characters. Throughout the exchange, there is no music, no ambient hum, and no incidental foley. Visually, nothing shifts except subtle micro-expressions: the woman’s brow relaxes after speaking, the man’s eyes narrow slightly in mock resignation, and both maintain their positions until the scene concludes, leaving the static framing and stylized pastel backdrop to focus entirely on their witty, sitcom-style banter.","video_1_relative_path":"videos/6124e7a2de8aa044.mp4","video_2_relative_path":"videos/f3860e3b74ad4b4d.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_2/example.json::00000024","text_prompt":"A cinematic scene in a quiet suburban driveway, captured in a fixed medium two-shot at eye level with a shallow depth of field, is bathed in soft, overcast daylight that casts gentle shadows across a muted earth-tone palette. To the left, a younger man in a grey hoodie, unbuttoned black-and-grey plaid flannel, and a black beanie with a red inner band stands facing right, his posture attentive and still. To the right, an older man with slicked-back dark hair, a thin mustache, rectangular glasses, a pale yellow button-down, and a tan field jacket rests his right hand lightly on the neck of a clear Erlenmeyer flask half-filled with a colorless liquid, which sits perched on the open tailgate of a white car. Behind them, leafy shrubs and a beige stucco wall with a barred window blur softly in the background, reinforcing the clandestine, private atmosphere of the setting. A calm, measured baritone cuts through the faint, steady hum of distant air-conditioning and traffic as the older man begins, his tone authoritative yet controlled: \"We will produce a chemically pure and stable product that performs as advertised.\"\n\nHis delivery remains deliberate, each clause separated by brief, weighty pauses, while his free left hand rises slightly with loosely curled fingers for emphasis before settling back near the flask. The younger man holds his ground, eyes fixed on the speaker, lips pressed together, absorbing the instruction without a flicker of visible reaction. The diffuse natural light balances the exposure, highlighting the contrast between the bright white vehicle, the clear glass laboratory equipment, and the subdued residential backdrop. As the older man finishes the sentence with a slight downward inflection signaling finality, he lowers his hand and returns to a neutral stance beside the flask. The camera remains completely still, capturing the asymmetrical power dynamic and the quiet tension of the moment until the ambient hum persists at a very low level and the scene fades without additional motion or audio flourish.","video_1_relative_path":"videos/c7d6a1cccb61e77d.mp4","video_2_relative_path":"videos/a1a4914184691c1e.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_3/example.json::00000093","text_prompt":"A low-key, intimate night interior shot inside a moving sedan, captured with subtle gimbal stability and a shallow depth of field that blurs the passing city lights into soft streaks across the windscreen. The camera rests over the front passenger’s shoulder, looking forward across the dim cabin toward the driver. He wears a black leather jacket over a light T-shirt, his left hand steady on the steering wheel while his right rests near the centre console. In his lap sits an open, light-brown cardboard box marked with bold red characters and a barcode. A calm, slightly upbeat male Mandarin voice breaks the steady low-frequency hum of the engine and road: \"明天还要带我去见一大客户。\" He turns his head fractionally toward the front-seat passenger, his tone shifting to gentle curiosity: \"你说他是不是要重用我？\"\n\nWithout a cut, the perspective reverses to an over-the-shoulder view from behind the driver, now framing the female passenger. She wears a cream-coloured coat over a white ruffled blouse, her dark hair pulled back, with small silver earrings catching the cabin’s ambient glow. Still cradling the same box, she angles it toward herself, revealing a front panel printed with colourful food imagery and large stylised characters. A bright, confident female Mandarin voice answers warmly: \"那肯定是啊。\" She lifts the box slightly, showcasing the packaging before settling it back into her lap. The continuous take holds on their quiet exchange, the low rumble of the vehicle and the soft wash of passing city lights reinforcing the intimate, unspoken trust between them as the car rolls steadily through the night.","video_1_relative_path":"videos/3f9ad551382325f8.mp4","video_2_relative_path":"videos/dcbe20e022eb4cca.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_5/example.json::00000008","text_prompt":"A static high-angle wide shot opens on an ornate East-Asian town at night, where traditional wooden buildings with dark tiled roofs line a gently flowing canal. A stone arch bridge spans the water in the mid-ground, its railings draped in greenery and small white flowers, while dozens of red-and-white paper lanterns hang from eaves, poles, and the bridge itself, casting a warm amber glow that reflects off the rippling surface. In the immediate foreground, two figures stand side-by-side on a balcony with their backs to the camera, gazing out over the scene. The figure on the left wears a pale lavender-to-white gradient robe with long dark hair tied in a high ponytail adorned with a silver ornament, while the figure on the right is dressed in a plain white robe, their hair gathered into an elaborate up-do secured by a floral pin. The air hums with a low, distant murmur of a lively night market, underscored by a soft, slow-tempo arrangement of plucked guzheng strings and airy dizi flute that establishes a calm yet wistful mood. A calm, reflective adult male voice in Standard Mandarin begins, his medium-low pitch carrying a quiet relief as he states, \"终于尘埃落定。\"\n\nThe camera remains fixed as faint lantern light sways in the breeze and petals drift across the canal. The man turns his head slightly toward his companion, his lips moving with measured precision before he speaks again, his steady moderate pace and subtle breathiness conveying a sense of forward hope: \"等去浊修好法器，我们就能回去了。\" As the final words fade, he completes his turn back toward the view, and both figures stand perfectly still, silhouetted against the glowing lanterns. The floating candle-lit lotus lamps glide farther downstream, their flickering reflections shimmering across the dark water while the traditional instrumental bed and distant crowd murmur persist uninterrupted. The scene holds on this contemplative tableau, the warm yellows and oranges of the lanterns contrasting beautifully with the cool purples and whites of the foreground robes, before the image gently fades to black, leaving only the lingering resonance of the adagio score and the quiet promise of a journey about to resume.","video_1_relative_path":"videos/aaf1f868741855a9.mp4","video_2_relative_path":"videos/63699da047341cb6.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_5/example.json::00000071","text_prompt":"A steady medium shot captures a warmly lit living room, framed with shallow depth of field to keep two children sharp against a softly blurred backdrop of wooden shelving and framed photos. The earthy, homey palette of reds, browns, and denim establishes a cozy domestic atmosphere, while a soft, slow-tempo instrumental bed of gentle acoustic guitar arpeggios and faint bass plays continuously beneath the scene. The boy, wearing a green-front and navy-sleeve raglan shirt, holds an open workbook and a yellow pencil, his brow slightly furrowed as he looks down at the page. Beside him, the girl with a long light-brown braid over her shoulder leans in, her eyes fixed on the same text. The boy, speaking in a calm, instructional tone, points at the page with his pencil and says, \"Okay, this says a complete sentence always contains a verb.\" He keeps the pencil hovering near the book to emphasize the key word while the girl listens attentively, nodding almost imperceptibly.\n\nAfter a brief pause, she lifts her gaze from the workbook to him, tilting her head slightly with raised eyebrows. The girl, her voice higher-pitched and tinged with mild curiosity, asks, \"Which one's a verb?\" The boy glances up briefly before returning his eyes to the page, raising the pencil once more to begin his explanation. The boy, maintaining a thoughtful delivery, responds, \"A verb is a word that describes an action.\" The quiet guitar music continues at the same subdued level, underscoring the intimate, collaborative atmosphere of their shared study session as the scene holds on their focused interaction.","video_1_relative_path":"videos/dccb8fba04b7c2c2.mp4","video_2_relative_path":"videos/21b677158edaca2b.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_8/example.json::00000056","text_prompt":"Cinematic historical vignette captured in a static wide shot from an elevated balcony perspective, looking straight down into a dimly lit traditional Chinese interior partially enclosed by a dark wooden railing with carved balusters. Warm amber light from numerous paper lanterns and wall sconces bathes the scene, casting soft pools of illumination against the deep browns of timber beams and roof tiles, while a faint, slow minor-key string melody led by cello and viola begins immediately and continues uninterrupted. Two women sit opposite each other at a low square table draped in a teal-blue cloth trimmed in gold, flanked symmetrically by potted pink-and-white blossoms and anchored by a traditional mountain landscape painting in the background. The woman on the left, dressed in flowing pale blue-white robes with her hair gathered high beneath a slender white ornament, turns slightly toward her companion and asks in a calm, gently inquisitive tone, “为何喜欢观星啊？” While the question hangs in the still air, the woman on the right, clad in muted sage-green layers and pinned with small golden hair accessories, keeps her gaze lowered to the tabletop with her hands resting lightly over one another. After a brief, reflective pause, she lifts her eyes fractionally, her voice soft and wistful as she replies, “因为繁星间，有我和家人的故事。” Her delivery is measured and tinged with nostalgia, accompanied by a minute nod and the almost imperceptible flex of her fingers atop her lap. The camera remains completely immobile, preserving the balanced composition and chiaroscuro contrast, while the dry, studio-clean dialogue cuts through the subdued, melancholic musical bed without any ambient room noise, cultivating a deeply intimate and contemplative atmosphere that lingers on themes of memory, lineage, and the quiet vastness of the stars.","video_1_relative_path":"videos/e1728055b65f95c8.mp4","video_2_relative_path":"videos/01f2f1a9c148afba.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/music/music_1/example.json::00000000","text_prompt":"A black-and-white cinematic scene opens in a static close-up, framing a young woman from the mid-chest upward against a plain interior wall with a door and handle faintly visible on the left. Soft frontal lighting sculpts her features, casting gentle shadows that highlight her expressive face. She has long, straight hair parted to one side, wears a dark top, and sports glittering rhinestone accents above her right eyebrow along with a subtle lip piercing. Cradling a handheld microphone in her right hand, she delivers a continuous, emotionally charged vocal performance. Her eyes open and close in time with the melody, her eyebrows lift, her lips shape each vowel with precision, and her head tilts slightly as her gaze drifts upward and sideways, as if reaching toward an unseen listener or lost in the musical phrasing. The camera remains completely still, holding this intimate portrait without cuts or movement.\n\nThe audio unfolds as a pure, unadorned duet between her voice and a solo acoustic piano. Her clear, mid-to-high register carries a moderate vibrato and a vulnerable, earnest tone, entering mid-phrase and swelling in intensity before gently fading toward a quiet cadence. The piano supports her with sustained, legato chords at a slow, rubato ballad tempo, avoiding any percussive rhythm while shifting dynamically between mezzo-piano and mezzo-forte. The space feels like a medium-sized, untreated room, lending a natural, moderate reverberation to both voice and keys. The sonic landscape is meticulously clean, stripped of all external noise, leaving only the subtle rustle of her clothing, the faint handling of the microphone, and her controlled, rhythmic breaths between phrases. Together, the monochrome framing and the raw, unpolished performance create an atmosphere of profound intimacy and emotional vulnerability, focusing entirely on the quiet power of a solitary singer and her piano accompaniment.","video_1_relative_path":"videos/96d8be8e6329fa24.mp4","video_2_relative_path":"videos/2d9fe81578bd8422.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/music/music_1/example.json::00000093","text_prompt":"An intimate acoustic pop-folk performance unfolds in a cozy recording studio bathed in warm natural daylight streaming through large windows, the space defined by exposed wooden beams and a palette of soft whites, light greens, and maroon. The camera opens in a medium shot framing two musicians: on the left, a young man in a light green polo shirt and headphones sits playing a fingerpicked steel-string acoustic guitar, while on the right, a young woman in a white lace crop top and blue jeans stands singing into a large silver condenser microphone. She wears over-ear headphones and rests a silver flute against her side, her soft, emotive American voice weaving through the gentle bass and light percussion. As the arrangement settles into a steady seventy-two-beat rhythm, she sings, \"When I see a sunset,\" her voice centered in the mix with a subtle reverb that catches the natural warmth of the wooden walls and ceiling.\n\nThe camera slowly pans right, revealing a third musician seated behind a large mixing console. With short brown hair, a maroon t-shirt, and headphones, he focuses intently on adjusting faders and knobs, his subtle hand movements mirroring the steady swell of the track. The guitarist strums steadily, occasionally glancing toward his bandmate, while the female vocalist maintains eye contact with her microphone, smiling faintly as she continues, \"I take a second.\" The soundscape remains rich with organic textures—the brushed snare, the soft kick, the faint rustle of guitar strings, the barely perceptible click of console adjustments, and a low-level HVAC hum—all layered beneath the mellow, reflective mood. The performance flows with serene intimacy, the natural acoustics and understated dynamics creating a perfectly captured moment that abruptly cuts off as the phrase concludes.","video_1_relative_path":"videos/1d3f656c010891a7.mp4","video_2_relative_path":"videos/c859d5843e901b34.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/music/music_2/example.json::00000093","text_prompt":"Cinematic wide static shot from an audience perspective, looking up at a concert stage set within a dark, hazy venue. Cool blue-white light from overhead spotlights and a horizontal row of bright stage lamps behind the performers cuts through atmospheric smoke, casting the silhouetted heads and shoulders of foreground audience members into shadow. On stage, a five-piece rock band stands in a classic formation: two electric guitarists anchor the sides, a central figure steps slightly forward with an acoustic-electric guitar and sings into a microphone, a drummer sits behind a kit in the rear center, and a fifth guitarist occupies the far left edge. All wear dark clothing and remain largely still, communicating only through subtle head tilts, fretboard shifts, and rhythmic posture adjustments. The camera holds its fixed position as the lighting remains constant, emphasizing the immersive, unbroken nature of the live performance.\n\nThe audio opens mid-phrase with a clear, slightly raspy tenor voice delivering the line \"built to last, you’re in ruins,\" backed by a full, anthemic alternative rock arrangement. Driving kick and snare patterns lock with a steady bassline while layered electric guitars weave rhythm chords and melodic fills across a moderate-to-fast tempo. The mix places the vocals slightly forward, drenched in a spacious natural reverb that suggests a large concert hall, yet the soundscape remains entirely free of crowd noise, ambient room tone, or incidental foley. The mood is intense yet tightly controlled, blending the atmospheric stage lighting with a polished, emotionally charged musical groove to capture a cohesive snapshot of a professional live show.","video_1_relative_path":"videos/8407f0cbaa699e9c.mp4","video_2_relative_path":"videos/258de556f292c39e.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/physics/physics_1/example.json::00000021","text_prompt":"A cinematic close-up in warm, natural tones captures a black wok resting on a gas stove, the camera static and positioned slightly above and angled toward the center. Bright overhead lighting creates strong specular highlights across the oil-slicked interior, while the softly blurred background reveals a hint of a green countertop to the left and dark cabinetry behind. Thinly sliced onions and round slices of green chilies sizzle vigorously in the hot oil, their edges beginning to brown as steady bubbles rise to the surface. A faint but continuous hiss from the frying dominates the soundscape, layered over a low-level indoor kitchen ambience with a touch of natural reverberation. A calm, instructional female voice speaking Malayalam begins, stating \"Add it to this.\"\n\nA right hand enters from the upper right, holding a small clear glass bowl brimming with bright yellow turmeric powder. As the hand tilts, the spice cascades onto the sizzling vegetables, creating a vivid splash of color that quickly speckles the mixture and begins to integrate into the shimmering oil. The narration continues in Malayalam, stating \"Let’s add turmeric powder to this,\" followed shortly by \"Four tablespoons of turmeric powder are being added here.\" A subtle metallic clink echoes as the bowl nears the wok’s rim, then fades back into the persistent mid-to-high frequency sizzling. The hand withdraws, leaving the camera fixed on the warming ingredients as the golden oil, pale onions, and vibrant green chilies settle into a cohesive, aromatic blend, all underscored by the steady, unbroken rhythm of the cooking process.","video_1_relative_path":"videos/63937f675934b008.mp4","video_2_relative_path":"videos/e3b7e79dbc0da265.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/physics/physics_4/example.json::00000070","text_prompt":"Cinematic close-up, handheld camera, shallow depth of field. The scene opens in an extreme close-up on a young man sleeping on his back, his face filling the frame. Soft, warm ambient light casts gentle shadows across his forehead and cheeks, highlighting his relaxed expression and slightly parted lips. The camera hovers just above his head, angled slightly downward to create an intimate, almost voyeuristic perspective, while exhibiting a subtle, natural jitter as it slowly drifts left and then back right. A white pillow rests beneath his head, and the dark blue edge of a blanket frames the bottom of the shot. His breathing is barely perceptible, and he remains completely still throughout. Over this quiet domestic stillness, a faint low-frequency hum from nearby electronics or an HVAC system provides a constant, subdued backdrop. Muffled through walls and room acoustics, a male broadcaster’s voice drifts in from a television or radio in another room, carrying a neutral, conversational tone typical of sports commentary. The announcer states, “We’re looking to scare somebody off. Up next, Hunter Cantwell really only has to stay in position to make the play,” before his voice fades into the ambient noise. The audio remains strictly limited to this distant broadcast and the low hum, with no music or additional sound effects, reinforcing a calm, observational mood where private rest quietly coexists with the distant bleed of public information.","video_1_relative_path":"videos/e5871e5e4d1f9857.mp4","video_2_relative_path":"videos/1de27e4e19387d69.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/podcast/podcast_1/example.json::00000080","text_prompt":"Cinematic documentary style, shot on a 35mm lens with high contrast lighting and a muted color palette, the frame opens on a stark black canvas where a stylized map of the Americas fills the view in muted greens and blues, anchored by a green pin over Minnesota and an orange pin over Venezuela. A bold red diagonal line traces the nearly three-thousand-mile route between them, marked by a small airplane icon and the distance label, while a tilted family photograph of four figures in a rustic cabin overlaps the left side and a peace symbol intertwined with a tiny aircraft rests in the corner. Against this static visual, a warm, narrative female voice begins, stating \"...gather everyone around the campfire and said, 'We’re about to embark on a journey.'\" The audio remains stripped of music or effects, leaving only her clear delivery and the subtle echo of a large hall.\n\nThe scene cuts abruptly to a dimly lit stage where a woman stands center-frame in a medium shot, bathed in isolating spotlight against a black backdrop with a tall vertical red curtain. She wears a shiny metallic olive-green bomber jacket over a black tee emblazoned with gold block letters, dark jeans, and a headset microphone, her long wavy brown hair framing an animated yet composed expression. As she gestures subtly with her right hand and turns her head toward the unseen audience, her conversational delivery continues seamlessly, stating \"Kids, we have a very international camp this year.\" The camera slowly pushes in to a tight close-up, capturing her widening smile and crinkling eyes as she raises her right index finger in a pointing gesture before relaxing it. She delivers her final line with heightened inflection, stating \"The Appencios are here from Venezuela,\" and the moment the sentence finishes, a brief collective chuckle erupts from the live crowd, swelling and fading quickly to leave the resonant performance space buzzing with lighthearted energy.","video_1_relative_path":"videos/03498a8be8bc35d5.mp4","video_2_relative_path":"videos/007d2315b2b49eea.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/voiceover/voiceover_1/example.json::00000054","text_prompt":"A cinematic nature-documentary sequence opens on a macro close-up of fresh Chinese toon shoots, their tender green leaves tipped with reddish-purple and glistening as if kissed by morning mist. Soft, diffuse daylight washes the frame in cool bluish tones against a hazy, out-of-focus backdrop of distant foliage. A calm, middle-aged male Mandarin voice-over begins, stating “一个星期，两茬香椿，叶子还在生长，却不再适合食用。对老安来说，这日复一日的跋涉既是生计，也是无声的坚守。” As he speaks, a minimalist solo-piano score enters with slow, legato arpeggios and light reverb, sitting quietly beneath a bed of natural ambience—soft wind and distant bird calls. The camera gently tilts downward and pulls back, revealing the branching structure before cutting to a high-angle wide shot of a rugged, terraced mountainside under an overcast sky. A lone figure dressed entirely in dark clothing and a cap trudges along a narrow rocky path, a large woven basket brimming with freshly harvested toon branches strapped to his back. Far below, a winding dirt road snakes through the valley.\n\nThe perspective widens further to show rolling hills receding into blue-grey haze beneath a pale sky, dotted with sparse shrubs and a bush bearing tiny purple blossoms. The man becomes a small silhouette walking toward the horizon, his burden still visible. The piano motif swells slightly but remains gentle, mirroring the quiet passage of time. Finally, the scene resolves into a medium silhouette against a warm, golden-orange sunset. Backlit by the glowing sky, the man’s outline stands stark and black, the textured mound of his harvest visible behind him. He pauses briefly, head bowed under the weight, conveying quiet fatigue and steadfast endurance. The natural ambience gradually fades, leaving only the lingering piano chords before dissolving into silence.","video_1_relative_path":"videos/53a663d06f1e8d56.mp4","video_2_relative_path":"videos/004735b2bf9ec349.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/voiceover/voiceover_4/example.json::00000022","text_prompt":"A suspenseful crime-drama scene opens on a handheld camera in a tight close-up, bathed in the soft, shadow-free daylight of an overcast sky that casts a muted, cool palette of greys and greens across the frame. The shallow depth of field renders the background into a creamy bokeh of out-of-focus trash bins and roadside refuse, isolating a tense East Asian man in his thirties standing beside a quiet two-lane asphalt road bordered by a grassy embankment. His dark hair is swept upward, his thin mustache and light stubble framing a face etched with apprehension; he wears a dark navy collared shirt beneath a black tactical vest, a white coiled earpiece wire trailing from his right ear. As he stares ahead with knitted brows and parted lips, a calm but urgent male Mandarin voice-over begins, stating “高建翔的心瞬间提到嗓子眼儿。” The ambient hush of the outdoors remains minimal, amplifying the quiet dread of the moment.\n\nHis gaze remains fixed off-screen to the left, jaw tightening with visible tension until he abruptly whips his head further in that direction, eyes widening and posture stiffening in sudden alarm. The handheld camera makes a micro-pan to keep him centered, tracking the shift from apprehension to alertness without breaking proximity. From an unseen source close to the microphone, a slightly higher-pitched male Mandarin voice cuts through the stillness with urgent inquiry: “什么时候报案的？” Before the silence can settle, the same voice answers in a brisk, matter-of-fact tone: “刚刚才报案的。” The man holds his squared shoulders and unwavering stare, his anxious determination locked onto whatever has triggered the sudden tension, leaving the scene suspended in the quiet, unresolved atmosphere of a critical moment on the brink of revelation.","video_1_relative_path":"videos/a88f89d6b458eeab.mp4","video_2_relative_path":"videos/40e7a9ab9b2e9999.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/voiceover/voiceover_5/example.json::00000049","text_prompt":"A wuxia-parody cinematic scene opens in a brightly lit traditional Chinese hall, framed with a slow, steady push-in that keeps the protagonist centered as he approaches the lens. The environment is defined by dark wooden pillars bearing vertical calligraphy, white lattice windows, and pale stone flooring, all bathed in even, naturalistic light that catches the sheen of the cool teal satin changshan worn by the man in his late thirties. His outfit is completed by a black skullcap with a jade-like button and dark sunglasses, while the earthy browns of the timber architecture contrast sharply with his garment. Beneath the visuals, a low-volume electronic underscore of soft synth pads and a muted percussive pulse sets a tense but restrained mood.\n\nThe man strides forward with a confident, slightly theatrical gait, his right hand rising briefly in emphasis as he speaks. A medium-low pitched adult male voice in Mandarin delivers a sharp, irritated exclamation, “靠.” He continues his approach, his tone shifting to a firm, declamatory declaration: “到了这个地步，我没办法不表达我真正的身份。” As he nears the foreground, he lifts both hands to his temples to grip the frames of his sunglasses, his posture conveying comedic bravado and self-importance. With heightened intensity and a dramatic flair, he begins his final line, “其实我就是那位隐世多年的剑客。” The scene holds on this moment of revelation, the ambient synth pads lingering as the camera completes its gentle dolly-in, preserving the striking teal-and-brown color palette and the actor’s exaggerated, wuxia-inspired performance until the clip naturally concludes.","video_1_relative_path":"videos/4c83c5d86ebe456c.mp4","video_2_relative_path":"videos/99149d30632058ed.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_davinci/multitalker/multitalker_7/example.json::00000043","text_prompt":"Cinematic domestic scene, static wide shot framed from behind a grey sofa backrest, even natural daylight casting soft shadows across a dark wood oval table set with four white bowls, two plates of sliced tomatoes and green vegetables, and chopsticks. Three figures occupy the space: a man in a black quilted jacket leans forward on the left, a taller man in a black turtleneck stands facing him in the center, and a woman in a patterned cardigan over a pink top holds a small white bowl to the right. Through a glass sliding door in the background, a fourth woman in an apron moves about the kitchen. The seated man gestures animatedly toward his standing companion, speaking with a clear, mid-range voice that carries a tone of mild exasperation or teasing. The standing man responds with a calm, measured delivery, nodding slightly as he listens, while the woman in the cardigan turns briefly toward the kitchen before re-engaging with the men. She then extends her arm to hand the seated man a pen or small object, which he accepts without looking up. Almost immediately, light, quick footsteps tap against the hard flooring as the aproned woman enters the dining area carrying a plate of food. She places it gently on the table with deliberate, unhurried movements, prompting subtle shifts in posture among the others as the cardigan-clad woman steps aside to accommodate her. The camera remains completely stationary throughout, maintaining consistent framing that captures all characters within a single composition. The soundscape is entirely devoid of background music, relying instead on the natural acoustic environment: a faint low-frequency hum from household appliances, the crisp clink of ceramic against wood, and the subtle rustle of clothing, all rendered with minimal reverberation to emphasize the intimate, contained atmosphere of everyday domestic life.","video_1_relative_path":"videos/06563dda5af9df6b.mp4","video_2_relative_path":"videos/43d5aa6b597a52a9.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_davinci/voiceover/voiceover_1/example.json::00000036","text_prompt":"A gritty crime thriller scene opens on a static medium close-up with shallow depth of field, bathed in desaturated greens and deep shadows. The setting is a dim, green-tinted interior that evokes a holding room, where a middle-aged East Asian man with a tight buzz cut sits slightly hunched in a wooden chair. He wears a worn, frayed olive-green T-shirt, and fresh red abrasions mark his right cheekbone and forehead, while dried blood crusts on his lower lip. Low-key lighting from above-right carves strong shadows across the left side of his face, emphasizing his fatigue. He stares downward toward someone just out of frame to his right, brow furrowed in tension. Over this silent, ambient-free scene, a calm male narrator in standard Mandarin speaks with a neutral, explanatory tone, stating, “先是一愣，接着又继续耍嘴皮。” (First he was stunned, then he kept talking nonsense.)\n\nThe man lifts his gaze, forcing a broad, almost mocking grin that stretches his bruised lips while his eyes narrow into a display of defiant bravado despite his visible injuries. After a brief, heavy silence, he tilts his head slightly forward and speaks in a rough, low voice with a noticeable northern Chinese accent, delivering his line with clipped, sardonic inflection: “这个我摸了。” (I’ve touched this one.) The shallow depth of field keeps the blurred outline of another figure’s dark hair barely visible at the extreme right edge, maintaining strict focus on the man’s micro-expressions and weary defiance. The scene holds on his taunting smirk as the audio cuts out, leaving the oppressive quiet to underscore the moment.","video_1_relative_path":"videos/750cca8238122dd9.mp4","video_2_relative_path":"videos/2a5ff5ba4668dd94.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_davinci/voiceover/voiceover_2/example.json::00000000","text_prompt":"A tense, suspenseful thriller sequence opens in a brightly lit modern corridor, likely an airport terminal, where polished floors reflect overhead lights and diffuse daylight filters through glass walls. Shot with a shallow depth of field, the camera begins in a tight close-up tracking a uniformed security officer in his late twenties as he strides purposefully toward the lens. His crisp white short-sleeved shirt features epaulets with three gold stripes, a black tie, and a circular yellow-and-black shoulder patch bearing a stylized eagle emblem, with a black radio microphone clipped to his left strap. His expression is sharp and alert as he scans the space, while blurred figures of passersby drift through the foreground, adding depth. An urgent, off-screen male voice in Mandarin states, “Isn’t that the guy from the car just now?” layered over a low, pulsing synth bass and faint high-pitched rhythmic ticks that establish a taut atmosphere.\n\nThe camera pulls back to a medium shot as the officer abruptly halts and pivots right, locking eyes with a man in his mid-thirties who has just entered the frame. The newcomer, light-skinned with a receding hairline, wears a blue patterned short-sleeve button-down and carries a white jacket draped over his left arm while gripping a small black device in his right. He appears startled but maintains his composure. The officer raises his right index finger in a sharp gesture and demands in rapid Spanish, “Do you have your pistol?” His urgent tone matches his lip movement precisely. Behind them, travelers stream past in both directions—a woman in a peach top and white pants walking away, two men in colorful Hawaiian shirts—some glancing curiously while others remain indifferent. The steady, driving electronic pulse continues beneath the ambient murmur of the crowd and the soft echo of footfalls on the hard, reverberant floor, sustaining the scene’s tense momentum.","video_1_relative_path":"videos/8ef89f6ec383ce93.mp4","video_2_relative_path":"videos/865016ef89ce86af.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_davinci/voiceover/voiceover_3/example.json::00000055","text_prompt":"Shot on a vintage 4:3 aspect ratio with a static, unblinking camera, this intimate scene unfolds in a sparsely furnished room defined by rough plaster walls and a muted, earth-tone palette that evokes a quiet, monastic atmosphere. Soft daylight streams in from camera-left, casting gentle shadows that accentuate the texture of the walls and illuminate a large rectangular mirror framed in dark, carved wood. Beneath the mirror rests a tabletop holding a tall clear glass oil lamp with a metal chimney, a small dark cylindrical container, and a few indistinct bottles on a rear shelf. Standing before the glass in a pale green-grey long-sleeved shirt unbuttoned at the collar is a man in his late thirties, his short, dark, slightly wavy hair catching the light as he faces the mirror mostly from behind and in left profile. He holds a small paperback book in both hands, his brow furrowed and lips moving silently as he rehearses. Over this hushed tableau, a calm, neutral male Mandarin voice-over begins, stating “……前练习，下次见面时要怎样向他索要签名。”\n\nThe man lowers his gaze to the pages, turning them once to adjust his wording while the ambient silence deepens the focus on his internal preparation. After a brief pause, he lifts his head toward his reflection, takes a slow breath, and speaks aloud in Italian with an earnest, tentative mid-low tone. “Per piacere, me lo può firmare?” he asks, his voice carrying a quiet politeness and a slight upward inflection. As the words leave his lips, his shoulders relax and a faint, hopeful smile touches his face. The frame remains entirely still, preserving the warm, desaturated color grading and low-contrast lighting that wrap the moment in nostalgic intimacy, while the absence of background noise ensures every subtle breath and the weight of his request hang clearly in the air.","video_1_relative_path":"videos/348045475103f095.mp4","video_2_relative_path":"videos/402020fd866f29a4.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/instruments/instruments_1/example.json::00000073","text_prompt":"A quiet, introspective home-studio scene captured in a steady medium-close shot, bathed in soft natural light streaming from the right. A male guitarist in a black T-shirt sits at a wooden desk holding an Apple monitor, a small drawer unit, a silver mixing console, and a black amplifier, his head bowed as his eyes lock onto the fretboard. He strikes a firm downstroke across all strings, producing a sharp, full-bodied chord with a warm, woody resonance that immediately establishes a slow, contemplative mood. The tempo remains unhurried, allowing the note to sustain before his left hand slides up the neck, muting several strings with a brief percussive chug. He strikes a second chord that rings out slightly brighter yet stays grounded in the low-mid register, each gesture given ample space to breathe.\n\nThe rhythm shifts into a restrained fingerstyle pattern as his right hand alternates thumb and fingers, weaving a gently rolling arpeggio that climbs subtly in pitch before resolving downward. His quiet breathing is nearly swallowed by the guitar’s resonance, and the clean, close-mic’d capture preserves every subtle string squeak and the faint ambient hush of the room. He then delivers a final, emphatic chord strike—a percussive accent that momentarily spikes in volume before decaying naturally into stillness. Both hands drop to his lap, his shoulders relaxing as the camera tilts just enough to reveal the guitar’s strap and headstock. A solitary, dry low-frequency thud echoes through the space, and the frame holds for a beat on his focused, motionless posture before cutting abruptly to black.","video_1_relative_path":"videos/34c0d008c7f5231e.mp4","video_2_relative_path":"videos/34fe196101671268.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/movie/movie_1/example.json::00000089","text_prompt":"A gritty wartime thriller captured on a handheld camera with a desaturated, smoke-washed palette opens inside a vast, war-torn industrial hall defined by towering concrete pillars and exposed ceiling beams. Thick greenish-yellow smoke diffuses harsh daylight through high windows, casting strong backlighting and deep silhouettes across the dusty floor. Soldiers in dark uniforms and steel helmets scramble low toward a makeshift sandbag barricade, their frantic movements framed by a low-angle shot that emphasizes the chaos. The soundscape is driven by a fast-paced, high-energy orchestral score featuring rapid string ostinatos, pounding timpani, and heroic brass fanfares, layered over sharp distant gunfire, muffled explosions, and the constant hiss of falling debris. As a heavy metal crate tumbles from above and crashes violently into the sandbags, a young male soldier, his voice strained and aggressive in standard Mandarin, shouts, \"Secure it tight and blow those bastards to hell!\" The music dips momentarily to let the command ring out with reverberant urgency before swelling back into the relentless rhythm.\n\nThe camera tilts upward to a tight close-up of a second soldier emerging from cover, his short-cropped hair and dirt-smudged face framed by a dark jacket with epaulets. Clutching a long rifle and a rectangular ammunition box, he scans the haze-filled horizon with wide, alert eyes and parted lips, his heavy breathing syncing with the camera’s movement and emphasizing his isolation against the looming architecture. Sporadic gunshots echo in the distance while dust continues to drift through the smoky air, but no further words are spoken. The orchestral score maintains its driving tempo, propelling the scene forward until it holds on his tense, watchful expression, capturing a raw snapshot of frontline desperation and coordinated action under fire.","video_1_relative_path":"videos/61658d2566d3dce9.mp4","video_2_relative_path":"videos/1c17f6115cbc0d8d.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_11/example.json::00000020","text_prompt":"Corporate ceremonial realism captured in a static medium-wide shot under warm overhead lighting, with a rich, saturated palette dominated by reds, golds, and deep charcoal tones. The scene opens in a spacious banquet hall where seven formally dressed men stand behind a large round dining table draped in a red-and-gold patterned cloth, surrounded by traditional Chinese dishes like whole roasted duck, fried spring rolls, peanuts, and bottles of green beer and orange soda. Against a backdrop of beige pleated curtains, a red horizontal banner reads “京州光明峰项目开发协调会.” At center-left, a man in a light grey suit steps forward to address an older gentleman in a dark grey textured blazer and white shirt. A clear, moderately loud male Mandarin voice begins, stating, \"Without Mayor Ding, there would be no today for our group.\" His tone is respectful and sincere, carrying a slight room reverberation that emphasizes the grand interior. He continues, his voice softening with gratitude: \"So thank you, I toast to you.\"\n\nMayor Ding meets his gaze with a warm smile, offering a brief, calm affirmative murmur as the surrounding men begin to nod and grin in approval. The ambient room tone remains low, punctuated only by the faint rustle of tailored suits and subtle shifts in posture. Suddenly, a higher-pitched male voice interjects with playful energy, pointing toward the mayor and exclaiming, \"Come, come, let’s raise them!\" The moment triggers a wave of overlapping male laughter and the sharp, crystalline clink of multiple wine glasses meeting in the center. The audio peaks briefly with the collective cheer before settling back into a comfortable, celebratory hum as the group leans forward together, sealing the toast in a gesture of shared respect and camaraderie.","video_1_relative_path":"videos/4d3d17680c9ee572.mp4","video_2_relative_path":"videos/35aa8a73e14d7960.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_12/example.json::00000064","text_prompt":"Shot on a locked-off medium close-up with a shallow depth of field, the scene opens in bright, even natural daylight that washes the frame in warm neutrals, punctuated by a festive palette of metallic gold, teal, dusty blue, pink, and maroon balloons floating in a softly blurred garden backdrop. An older man in his late fifties, fair-skinned with neatly combed dark-brown hair, a thin mustache, and rimless glasses, sits on a light-colored bench facing slightly right toward a younger companion whose back is to the camera. A tall green vase of flowers rests just behind his shoulder as he begins to speak in a light, teasing tone. Smiling broadly with eyes crinkling at the corners, he asks, “High school?” His warm baritone carries a relaxed, moderate volume that sets a lighthearted mood. Still smiling, his expression turns earnest as he shakes his head once and replies, “No, no, seriously.” His calm delivery now carries genuine curiosity, followed by a brief pause where he lowers his smile and his brow furrows slightly. Leaning forward a fraction, he probes with a friendly yet steady tone, “What’s stopping us?” The camera remains fixed, preserving the balanced exposure and natural late-morning light.\n\nA short silence hangs in the air, filled only by a faint outdoor hush, as his gaze intensifies and his lips part as if struck by a sudden realization. The ambient soundscape remains minimal, allowing the quiet tension to build through his shifting facial expressions and vocal inflection. His demeanor shifts abruptly from playful amusement to sudden alarm. His eyes widen, eyebrows lift, and his mouth opens as he exclaims in a sharper, urgent voice, “Wait a minute. Elliot, what are you suggesting?” The sentence lands with unresolved anticipation, leaving the scene on a note of mild tension that invites the viewer to lean in. The lighting, framing, and festive background remain constant until the moment cuts away, preserving the cinematic stillness and emotional pivot.","video_1_relative_path":"videos/ef320c09b5757df7.mp4","video_2_relative_path":"videos/a6f21a3812a86df6.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_7/example.json::00000058","text_prompt":"Cinematic domestic drama, 50mm eye-level medium close-ups, shallow depth of field, soft diffuse daylight from camera-right, cool-neutral color temperature, muted earth tones balanced by crisp whites and subtle accent colors. The scene opens in a bright, naturally lit living space where an older East Asian man sits slightly left of frame, wearing a dark olive-green zip-up jacket over a collared shirt. His posture is subdued, eyes cast downward with a furrowed brow and parted lips, radiating quiet resignation. The softly out-of-focus background reveals white shelving, potted plants, a treadmill, and a yellow armchair, grounding the moment in a lived-in home. A weary, mid-low pitched male Mandarin voice, slightly resigned, begins, stating \"我合着不能上你们公司去吃去吧。\" The room remains otherwise silent, the camera locked static to hold the weight of his hesitation.\n\nA straight cut transitions to a medium close-up of a younger East Asian woman standing centrally against a pale-grey wall, framed with the same steady, intimate lens. She wears a light beige V-neck sweater layered over a blue lace high-collar blouse, her dark hair tied back with soft bangs, and subtle makeup that catches the even daylight. Behind her, a white refrigerator dotted with colorful magnets and a wooden sideboard displaying framed photographs and figurines anchor the domestic setting. A calm, clear female Mandarin voice, gentle and reassuring, follows, adding \"爸，这个啊您不用担心，现在那个订餐服务呢特别的方便。\" The quiet atmosphere persists, devoid of music or ambient noise, allowing the contrast between his subdued concern and her confident reassurance to anchor the generational exchange. The shot holds steady, preserving the soft diffusion and natural color palette as the conversation settles into the everyday rhythm of modern family life.","video_1_relative_path":"videos/bd25d5daf15a7318.mp4","video_2_relative_path":"videos/5ff0c3dbc851f804.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/music/music_2/example.json::00000028","text_prompt":"Cinematic intimate performance, static medium shot, soft natural daylight filtering through sheer curtains bathes a gently sunlit bedroom in even, pale yellow illumination without harsh shadows. The composition emphasizes warmth and domesticity, featuring a bed with white bedding and pastel pillows against a brass headboard, a tall stack of multicolored books, and a small nightstand holding a framed landscape painting, two green glass bottles, and a yellow smiley-face object. Centered in frame, a young woman with long brown hair and fair skin wears a dark olive-green ribbed tank top while cradling a natural-finish acoustic guitar across her lap. Her left hand frets chords near the middle of the neck while her right hand fingerpicks steadily over the soundhole, her posture relaxed and her focus entirely on the instrument.\n\nA calm, expressive female vocal enters mid-phrase, singing a legato melody in a mid-to-high register accompanied by slow, arpeggiated guitar chords. The song carries a gentle, slightly melancholic tone at a moderate tempo with consistent dynamics, while subtle natural reverb suggests a modest, quiet interior space. As she performs, her lips move in perfect sync with the lyrics, her voice weaving through the line \"stroll without a care beneath the open sky\" before resolving into the next measure. She occasionally glances down at the fretboard before lifting her gaze directly into the camera lens, and briefly closes her eyes while sustaining a long note, her head tilting back a fraction. The final syllable trails off gently as the last guitar chord rings out, leaving only the faint, intimate sounds of strings against frets and soft breaths between phrases, with no ambient noise or external distractions breaking the reflective atmosphere.","video_1_relative_path":"videos/72128568fb8de35c.mp4","video_2_relative_path":"videos/d8f7541bbece6ebc.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/physics/physics_3/example.json::00000090","text_prompt":"A tender, domestic vignette captured in a tight handheld close-up, bathed in bright, diffuse natural light that washes the background into a soft overexposed white. The frame centers on a small kitten resting on its side atop a plush white blanket, its fluffy white coat accented by gray-brown patches on the ears, face, and paws. Initially facing left, the kitten turns its head toward the camera as a human right hand enters from above to gently stroke its back and neck. The touch prompts a short, high-pitched meow, followed moments later by a second, softer vocalization as the hand glides down the kitten’s spine. The kitten shifts into a more upright posture, lifting a front paw slightly while its tail curls behind it, and a calm, gentle female voice softly murmurs, \"Right,\" perfectly timed to the soothing rhythm of the petting.\n\nThe camera holds its steady, slightly shaky grip as the kitten blinks slowly and leans forward, bringing its nose almost into the lens before pulling back. The human hand remains in constant, tactile contact with the kitten’s back, providing a steady anchor of comfort. As the interaction settles, the audio fades to a quiet blend of faint room tone and the subtle rustle of fabric against fur, punctuated only by the minor handling noise of the camera. The scene concludes with the kitten centered in frame, gazing directly into the lens, while the hand rests gently upon its fur, encapsulating a moment of quiet, affectionate bonding in a softly lit, intimate space.","video_1_relative_path":"videos/c6d97786a7566247.mp4","video_2_relative_path":"videos/bc490ca136a3aa0e.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/physics/physics_8/example.json::00000004","text_prompt":"Shot on a handheld device with a casual smartphone aesthetic, the scene opens low to the ground in a warmly lit, carpeted room, initially soft-focused with motion blur that gradually sharpens into a medium shot. Two dark-furred cats dart around the lower legs of a person standing still in light gray jeans and white socks. One cat lunges playfully at the right ankle, claws briefly extending upon contact, while the other weaves behind the left leg. A sharp, startled yet playful female voice cries out, \"Ouch!\" from just off-camera. The camera jerks upward and pans right, tracking the action as both cats leap onto the person’s legs. One scrambles up the front of the right pant leg, claws scraping audibly against the denim, while the other bats at the hem from behind. Their movements are quick and acrobatic, tails raised and ears forward, signaling pure excitement rather than aggression.\n\nThe handheld frame holds steady with a subtle, natural tremor as the feline ascent continues. The right-side cat reaches the knee, pauses to groom its paw, and drops back down, while the second cat leaps higher, momentarily vanishing above the frame before reappearing near the waistline. The audio landscape remains entirely diegetic and tightly synchronized with the visual action: sharp transients of claw scrapes on fabric blend with the broadband rustle of shifting denim and the soft, low-mid thuds of paws landing on the carpet. Beneath it all lies a faint, consistent room tone, grounding the scene in a quiet domestic space. As the cats continue their playful engagement, the same female speaker releases two short, breathy chuckles, light and amused, weaving seamlessly with the tactile sounds of movement. The overall mood is lighthearted and affectionate, capturing an unscripted, authentic moment of pet-owner bonding rendered with immediate, raw intimacy.","video_1_relative_path":"videos/c1256045594f03d2.mp4","video_2_relative_path":"videos/0900d2f6b3334429.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/voiceover/voiceover_8/example.json::00000016","text_prompt":"Cinematic medium close-up, static camera, shallow depth of field, soft frontal key lighting, and a muted color palette with a single pop of turquoise and gold frame a young woman from mid-chest upward. She wears a crisp white high-collared blouse and a vivid satin sleep mask edged with ornate gold braid, her light-brown hair gathered in a loose up-do with delicate strands framing her face. Her eyes are closed, head tilted gently downward in deep introspection against a plain pale wall softly lit from the front-left, casting gentle shadows on the right side of her face and neck. A soft, slow piano melody in a major key begins immediately, establishing a calm, slightly wistful atmosphere, while a faint, distant male voice whispers in Mandarin, “所有的不安。” setting a reflective tone before the scene transitions into quiet motion.\n\nThe woman slowly opens her eyes, lowering her gaze toward the lower left of the frame, her lips parting to speak in a refined Southern British accent. Her delivery is quiet, breathy, and contemplative, paced slowly over the unhurried piano accompaniment, with subtle micro-expressions—a slow blink, minute eye movement, and barely perceptible lip parting—conveying inner reflection rather than overt emotion. She murmurs, “If I could find a real-life place that made me feel like Tiffany’s, then I would finally know I had found exactly what I was looking for,” her voice carrying a slight upward inflection that leaves the thought lingering in the air. Her expression remains pensive, eyes half-lidded and mouth just parted, as the piano phrase continues unobtrusively, fading gently into silence without any visual cut or shift in lighting, preserving the dreamy, emotionally resonant stillness of the moment.","video_1_relative_path":"videos/ed5058bfff119027.mp4","video_2_relative_path":"videos/d046d7ae25d09cc6.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_davinci/multitalker/multitalker_2/example.json::00000089","text_prompt":"A cool, bluish-grey daylight washes over a high-rise rooftop overlooking a hazy city skyline and a broad expanse of water, establishing a desaturated palette of muted blues and greys that evokes emotional distance and tension. The camera opens in a tight close-up on the right profile of an East Asian man in a dark suit jacket and white collared shirt, his short black hair streaked with lighter highlights. His eyes are lowered and brows faintly knit, projecting a pensive, troubled air while a faint, steady low-frequency environmental hum underscores the silence. The shot cuts to a matching close-up of a second East Asian man with slightly longer dark hair and a neat goatee, facing left with a calm but intent expression. A measured, mid-low Mandarin voice breaks the quiet as he asks, \"Where is what I asked for?\"\n\nThe camera then shifts to an over-the-shoulder view from behind the first man, framing the speaker in profile against the static cityscape, before cutting to a frontal two-shot that places both men in medium close-up, face-to-face and separated by only half a metre. Locked in an intense stare-down, the first man lifts his gaze, meets his counterpart’s eyes, and responds in a firmer, slightly lower register with a restrained challenge: \"You might not have brought what I need anyway.\" He lowers his head slightly as the exchange ends, the cold, even lighting casting minimal shadows while the unbroken ambient hum and absence of music keep the focus entirely on the silent power struggle and strategic negotiation between them.","video_1_relative_path":"videos/ef538b3b238595df.mp4","video_2_relative_path":"videos/d613a2b967df06ab.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_davinci/multitalker/multitalker_5/example.json::00000058","text_prompt":"A sun-bleached, desert-like environment bathed in warm sepia and amber tones, captured in a static medium shot at eye level. Strong sunlight cuts through the arid air, casting sharp, high-contrast shadows that emphasize the harshness of the setting. In the mid-ground, two men stand beside a low, trough-like cart whose sides are bound with thick, braided rope. The older man, late fifties with thinning dark hair streaked with grey and light stubble, wears a beige long-sleeved shirt beneath a dark sleeveless vest trimmed with coarse fur and a heavy brown leather apron. He leans forward, gripping a short-handled brush and vigorously scraping the inner surface of the trough, his steady, practiced movements accompanied by faint metallic scrapes. Standing slightly behind him is a younger man in his early thirties, clean-shaven with shoulder-length black hair, dressed in a sharp charcoal pin-striped suit, white dress shirt, and a blue-and-white patterned tie. He holds a small dark rectangular device in both hands, his gaze fixed attentively on the older man’s labor.\n\nAs the rhythmic scraping continues, the older man lifts his head and speaks in Mandarin, his mid-low voice carrying a slightly rough timbre and a northern accent. His tone is conversational yet edged with mild exasperation, as if half-jokingly chiding his companion: \"你不看节目，那我不是真成了卖黑油的吗？\" The younger man briefly glances up from his device to acknowledge the remark before returning his focus to the older man’s work. The ambient soundscape remains sparse and grounded, dominated by the low, continuous hum of distant machinery or wind, with no music to soften the realism. The older man lowers his head again, resuming his labor with unwavering rhythm while the younger man shifts his weight slightly, his formal attire standing in stark contrast to the rugged, clandestine atmosphere of the scene. The camera holds its position, allowing the quiet tension and the juxtaposition of business wear against manual toil to settle over the sun-baked landscape until the moment fades.","video_1_relative_path":"videos/07e29c120ce261bd.mp4","video_2_relative_path":"videos/5e1b278500fb1476.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_davinci/multitalker/multitalker_5/example.json::00000059","text_prompt":"A sun-dappled, tree-lined park path fills the frame in a steady, eye-level medium two-shot, shot with a 35mm lens under soft midday canopy light that casts mottled highlights and establishes a colour palette dominated by greens and earth tones. A woman with shoulder-length wavy blonde hair and a man with short dark-brown hair walk toward the camera at an unhurried pace. She wears a sleeveless black top with delicate lace edging and carries a brown leather cross-body bag, while he is dressed in a dark charcoal blazer over an off-white button-down shirt with the top buttons undone. The camera executes a slow, continuous backward tracking movement to keep them centered as they approach, passing a green metal trash can and clusters of pink flowers against dense foliage. A warm, optimistic female voice with a North American accent begins, stating, “Now that we’ve met again, we can change our memory of that December sixteenth.”\n\nThe man listens with his eyes lowered and brow gently furrowed, absorbing her words as their shoes make soft, rhythmic thuds on the pavement beneath a subtle bed of distant traffic hum and occasional bird calls. She maintains steady eye contact, her expression earnest yet hopeful, and continues, her tone gentle with a slight uplift in intonation, adding, “It no longer has that sad ending of us never seeing each other again.” As she finishes, the man lifts his gaze to meet hers, his lips parting slightly as if preparing a response, his posture relaxed but fully attentive. Sunlight flickers across their faces while overhead branches sway, the intimate, low-noise soundscape and shared visual proximity underscoring a quiet sense of reconciliation and renewed hope.","video_1_relative_path":"videos/263fce553e8c6f3e.mp4","video_2_relative_path":"videos/db67f4c801c1ebb8.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_davinci/multitalker/multitalker_5/example.json::00000097","text_prompt":"A tense, naturalistic drama scene captured in a single static medium two-shot, eye-level and framed from mid-thigh upward, unfolds in a modest, sparsely furnished room. Muted earth tones dominate the palette, with pale pink walls and sheer off-white curtains diffusing soft daylight from camera-left, casting gentle shadows across the right side of the characters' faces while keeping both figures sharply in focus against a softly blurred background. The older man, wearing thin metal-rimmed glasses and a green-and-white vertically striped button-down shirt, sits in a dark wooden armchair at frame left, his posture relaxed but his expression grave. Beside him on a simple wooden bench, the younger man leans forward with legs apart, clad in a black T-shirt beneath an unzipped black jacket whose bright red hood lining provides a subtle visual anchor. The atmosphere is restrained and heavy, underscored by a persistent low-frequency electronic hum that suggests hidden machinery or HVAC systems, stripping away music to heighten the realism and quiet tension. The older man begins to speak in a measured, serious tone, his voice carrying a faint rasp and deliberate pacing as he leans slightly forward. He states, \"Gonzo is currently operating as a police informant, as far as you know?\" The revelation hangs in the still air, hinting at espionage or criminal intrigue, while the younger man remains completely silent. His eyes stay locked on the speaker, lips pressed tight and brow faintly furrowed, his attentive posture radiating concern and contemplation. The camera holds steady, allowing the weight of the question and the unspoken reaction to fill the frame, leaving the audience suspended in the quiet aftermath of a dangerous confession.","video_1_relative_path":"videos/90d930f85dee64d4.mp4","video_2_relative_path":"videos/b3a0705c9d873efd.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_davinci/multitalker/multitalker_8/example.json::00000050","text_prompt":"Cinematic medium shot, locked off and framed at waist-up height, capturing a tense confrontation on a bright, sun-drenched outdoor patio. Lush green foliage and beige umbrellas establish an upscale garden-party atmosphere, rendered in high-key natural light with soft shadows that preserve the crisp textures of the scene. In the center foreground, a man with short dark hair, wearing a black-and-white plaid shirt over rolled sleeves, blue jeans, and a silver wristwatch, stands with a furrowed brow and clenched jaw, his posture radiating immediate indignation. To his left, a woman in a sleeveless white pleated dress grips his left arm just below the elbow, her wide eyes and pressed lips signaling alarm and restrained concern. Slightly behind them, another woman in a pink one-piece swimsuit holds a wine glass, her stern, unsmiling gaze fixed on the escalating dispute, while a loose semicircle of formally dressed onlookers—including a bespectacled man in a dark suit offering a faint, detached smile—watches in silent scrutiny. A low, indistinct crowd murmur hums beneath the tension as the man thrusts his head forward and jabs his right hand toward an unseen target off-camera right.\n\nA loud, aggressive adult male Mandarin voice shouts, \"黄老板.\" He escalates without pausing, his voice rising in emphatic accusation as he points a finger directly ahead: \"黄老板了不起啊？\" His expression intensifies, eyebrows knitted and jaw set, as he continues, \"黄老板就可以耍流氓吗？\" Finally, maintaining unbroken eye contact with the off-screen figure, he delivers his peak-volume challenge, his tone sharp and incredulous: \"你打人还有理了？\" The camera never moves, the natural daylight remains even, and the scene holds on the man’s confrontational stance, the woman’s worried grip, and the frozen attention of the surrounding guests as the audio fades into the persistent background murmur.","video_1_relative_path":"videos/63158b5d841c036f.mp4","video_2_relative_path":"videos/f71cd829beb730ab.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_davinci/voiceover/voiceover_2/example.json::00000091","text_prompt":"Cinematic reality-style footage, shot on a handheld camera with quick pans and minor zooms, opens in a dimly lit, crowded restaurant or bar at night, bathed in a hazy glow of warm yellow-orange practicals and flickering neon accents that cast high-contrast shadows across wooden tables, plastic stools, and liquor bottles. In a medium shot, a middle-aged man with a close-cropped haircut (Man A) leans forward, gripping another man’s arm in agitation while a bald man in a black shirt with bold gold-yellow baroque patterns on the shoulders stands rigid behind him. A calm, neutral male Mandarin narrator begins, stating \"你们并不买账。\" as the slightly shaky camera captures the tense onlookers scattered around the room. The confrontation suddenly escalates; Man A straightens abruptly and thrusts his right hand toward the other man’s chest while shouting a forceful retort. The narrator continues, \"双方很快便扭打在一起。\" as the bald man recoils in alarm, eyes wide, prompting nearby patrons to flinch and gasp. The camera jolts left, briefly blurring red-framed wall art and a glowing vertical sign.\n\nThe bald man seizes Man A’s collar with both hands, yanking him forward until their faces are inches apart. Man A snarls and pushes back, while a lower-pitched, harsh male voice cuts through the ambient murmur, shouting \"算你个屁啊!\" The camera shakes violently, momentarily losing focus before stabilizing on the two locked in a physical struggle. Neon lights flicker in the background as bodies twist, chairs scrape, and fabric rustles. Man A manages to break free, stumbling backward and raising his hands defensively, while the aggressor lunges forward but is partially blocked by diners instinctively stepping aside. The scene dissolves into raw, diegetic sound—shuffling feet, muffled voices, and the residual clatter of the scuffle—with no background music, focusing entirely on the chaotic tableau as the image holds on the unresolved confrontation.","video_1_relative_path":"videos/55753ed83f62d663.mp4","video_2_relative_path":"videos/aa65f8f31ae41f13.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_davinci/voiceover/voiceover_3/example.json::00000035","text_prompt":"Late-afternoon sunlight back-lights a tranquil riverside canal, establishing a high-contrast cinematic look with warm highlights and cool blue-green tones in the shallow-focus background of blurred trees, concrete embankments, and a low bridge. The camera opens on a locked-off medium close-up of a middle-aged white man with short salt-and-pepper hair and a light-blue button-down shirt, his face softly side-lit with shadows carving one cheek while rim light catches his hair and shoulder. A subdued, low-frequency electronic drone hums beneath the quiet atmosphere as he looks slightly off-camera to his right, lips parted, and delivers a calm, slightly dismissive line in Mandarin: \"虚的,\" completing the thought with a weary dismissal of empty games. The shot holds for a beat before cutting without movement to a matching medium close-up of a bald Black man in a dark suit, light dress shirt, and red patterned tie, standing against the same sun-dappled environment.\n\nHe maintains steady eye contact toward the first man’s position, his voice resonant and measured as he replies in English, \"And for you.\" The ambient synth bed continues quietly, then swells imperceptibly with a faint higher-pitched pad that deepens the tension. The suited man’s expression shifts subtly—eyebrows lifting, mouth corners tightening—as he weighs his words, glancing briefly downward before returning his gaze forward. He leans forward a fraction, his tone growing more personal and emphatic, mixing quiet pride with a direct challenge as he states, \"I’m a native son of South Central, Bosch.\" The camera remains fixed on his intent expression as the warm sunlight contrasts sharply with the cool, blurred environment, the tense electronic undercurrent holding steady until the frame fades.","video_1_relative_path":"videos/adb7835e656ec970.mp4","video_2_relative_path":"videos/18c6ec24d9d15879.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/instruments/instruments_1/example.json::00000000","text_prompt":"A cinematic acoustic performance opens on a static interior shot inside a moving car, camera fixed on the back seat where a young East Asian performer with shoulder-length dark hair sits belted in, a small wood-grain ukulele angled comfortably across their torso. Diffuse natural daylight pours through the side windows, softly illuminating the black leather cabin and the instrument’s glossy surface while blurred greenery streaks past outside. The performer begins playing at a lively tempo, their right hand driving a steady eighth-note pulse with bright, percussive downstrokes and lighter upstrokes. Each strike produces a warm, resonant chord that fills the confined space, while the left hand precisely frets open-position shapes, fingers pressing firmly against the metal frets. The audio is pristine and close-mic’d, capturing the clear, woody timbre of the solo ukulele with strong midrange presence and only the faintest finger squeaks during position shifts.\n\nThe performance unfolds with nuanced dynamic control and rhythmic syncopation. The right hand alternates between broad strumming gestures and rapid, finger-picked runs that dance above the chordal foundation, creating crisp staccato accents and smooth legato arpeggios. As the melody progresses, the performer’s concentration deepens, eyebrows lifting slightly while their gaze remains fixed on the fretboard, occasionally breaking to meet the camera with an intimate, relaxed focus. The harmony shifts through a bright major progression, the strumming gradually intensifying as the right arm extends further to build volume. A climactic downward sweep snaps the wrist back, unleashing a rich, resonant peak before a rapid trill-like ornament shimmers across the strings. In the final moments, the strumming softens into a gentle decrescendo; the right hand slows, fingers lingering to let harmonics ring out, while the left hand gradually releases pressure and settles into a home position for a two-chord cadential resolution. The performer’s shoulders drop, body relaxing as the notes naturally decay into silence. The frame holds steady, capturing the quiet aftermath of the performance, with the faint ambient resonance of the car and the lingering acoustic tail carrying the scene to a peaceful close, conveying casual confidence and focused artistry.","video_1_relative_path":"videos/05f33f88db6750df.mp4","video_2_relative_path":"videos/6cdafa1da214007d.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/multitalker/multitalker_5/example.json::00000044","text_prompt":"A static wide shot at eye level captures a spacious, open-sided pavilion defined by dark red pillars and pale wooden flooring, where soft, diffused daylight filters through sheer grey curtains framing large rectangular openings. Beyond the threshold, white-walled buildings with grey-tiled roofs and a pink lattice balcony rest beneath an overcast sky, establishing a subdued, scholarly atmosphere. In the foreground, a low square black table holds a small light-green teapot and two matching cups on a tray. Behind it, a man in layered cream-yellow robes bends toward a low shelf, lifts two identical dark-brown spherical objects roughly the size of a grapefruit, and straightens as a faint rustle of silk accompanies his movement. Simultaneously, a firm, slightly exasperated male Mandarin voice from the left pillar begins, stating “财能通神啊，殿下。”\n\nThe man in cream-yellow turns toward his companion, brow furrowed and mouth parted, still clutching the spheres. His counterpart in a long dark-blue robe pivots away, his soft footsteps audible on the wooden floor as he walks toward the rear wall and retrieves a narrow, ornate wooden case that gleams faintly under the diffused light. Continuing his inquiry with a tone rising in disbelief, he asks, “可这跟点火有什么关系吗，师兄？” He halts near the table, now facing forward with the decorative case held horizontally at waist height, his posture upright and shoulders squared. The man in cream-yellow watches him closely, eyes narrowing as he weighs the implications of the exchange. The ambient space remains quiet save for the residual swish of garments and a muted thud as the case settles, the absence of music focusing attention on their composed historical-drama etiquette and the underlying intellectual tension. The camera holds static as both men freeze in this restrained, weighty moment.","video_1_relative_path":"videos/7d0a9bb1cfe22953.mp4","video_2_relative_path":"videos/3f0d08f629c86547.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/physics/physics_5/example.json::00000051","text_prompt":"Cinematic domestic scene, captured on a static close-up lens with practical kitchen lighting and a muted, natural palette. A black saucepan with a gray handle rests on the front-left burner of a matte black gas stovetop, filled with vigorously boiling water. Large bubbles break the surface continuously as thick steam rises into the air, while a steady blue flame flickers visibly through the iron grates, casting a cool, functional glow. To the left, a sliver of a red kitchen cabinet anchors the setting, and the stovetop’s control knobs line the foreground. The camera remains fixed, holding the tight composition without movement.\n\nAn off-screen female voice, young and calm with a neutral, instructional tone, begins speaking over the scene, stating, \"Now, add the noodles to the water.\" Simultaneously, a loud, sharp crinkling sound echoes, consistent with hands tearing open a plastic or foil pasta package. A right hand wearing a light-gray ribbed long-sleeve shirt enters from the upper left, lowering a bundle of dry, yellow spaghetti toward the pot. The crinkling fades as the pasta is released, hitting the rolling boil with a distinct, short splash that sends a fresh wave of steam upward. The noodles immediately begin to soften and submerge.\n\nThe hand withdraws from the frame, leaving only the pot and stove in view. The water resumes its vigorous simmer around the submerged pasta, with foam and small bubbles gathering along the surface. A low, continuous bubbling sound dominates the audio landscape, layered over a faint, reverberant kitchen room tone. The scene holds on this quiet, practical moment of everyday cooking, emphasizing the transition from empty boiling water to submerged pasta under steady, naturalistic lighting.","video_1_relative_path":"videos/634fc8a29b27a781.mp4","video_2_relative_path":"videos/c2c14f529f9b3bb8.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/podcast/podcast_2/example.json::00000049","text_prompt":"Cinematic medium-wide shot, cool blue digital backdrop with soft bokeh contrasted by warm amber stage lighting, static camera, subtle floor haze. A poised East Asian woman stands center-frame on a circular red rug, wearing a knee-length short-sleeved grey dress and holding a small black remote at waist level. Her long dark hair and bangs frame a composed, earnest face as she begins in profile, tilting her head slightly upward with hands loosely clasped around the remote. Two large professional stage lights on tall black tripods to her left cast a golden glow that catches the atmospheric mist, drawing focus to her minimalist attire and the intimate yet professional auditorium setting.\n\nShe turns her torso toward the center, raising her right hand for gentle emphasis as her eyebrows lift subtly. Her measured delivery fills the spacious room with clear, natural reverberation. After a quiet breath, she says, “After years of rushing, I told myself it’s time to bring a mindful patience into the impatience that has long governed our days.” Her hands return to a neutral position at her waist, her gaze shifting forward as her voice trails off with a slight downward inflection. The scene is devoid of music or crowd noise, leaving only the low hum of the venue’s HVAC system and the crisp cadence of her words to underscore a mood of quiet conviction and intentional clarity.","video_1_relative_path":"videos/84590d3baba6075a.mp4","video_2_relative_path":"videos/1475e1593bfed7e8.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/voiceover/voiceover_8/example.json::00000015","text_prompt":"Cinematic medium close-up, static camera, shallow depth of field, soft frontal key lighting, and a muted color palette with a single pop of turquoise and gold frame a young woman from mid-chest upward. She wears a crisp white high-collared blouse and a vivid satin sleep mask edged with ornate gold braid, her light-brown hair gathered in a loose up-do with delicate strands framing her face. Her eyes are closed, head tilted gently downward in deep introspection against a plain pale wall softly lit from the front-left, casting gentle shadows on the right side of her face and neck. A soft, slow piano melody in a major key begins immediately, establishing a calm, slightly wistful atmosphere, while a faint, distant male voice whispers in Mandarin, “所有的不安。” setting a reflective tone before the scene transitions into quiet motion.\n\nThe woman slowly opens her eyes, lowering her gaze toward the lower left of the frame, her lips parting to speak in a refined Southern British accent. Her delivery is quiet, breathy, and contemplative, paced slowly over the unhurried piano accompaniment, with subtle micro-expressions—a slow blink, minute eye movement, and barely perceptible lip parting—conveying inner reflection rather than overt emotion. She murmurs, “If I could find a real-life place that made me feel like Tiffany’s, then I would finally know I had found exactly what I was looking for,” her voice carrying a slight upward inflection that leaves the thought lingering in the air. Her expression remains pensive, eyes half-lidded and mouth just parted, as the piano phrase continues unobtrusively, fading gently into silence without any visual cut or shift in lighting, preserving the dreamy, emotionally resonant stillness of the moment.","video_1_relative_path":"videos/2e94dc96dd96a9a7.mp4","video_2_relative_path":"videos/ce7befbc557d20ab.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/voiceover/voiceover_8/example.json::00000041","text_prompt":"Cinematic night scene in a dense forest, captured with a static medium two-shot that abruptly cuts to a tight close-up. Illuminated by a single dim frontal light that carves stark highlights from the subjects while swallowing the background in absolute darkness, two men stand side by side facing the camera, frozen in wide-eyed surprise. The man on the left wears a maroon beanie, a blue T-shirt, and an unzipped dark jacket, while his companion sports reddish-brown hair beneath a dark green jacket layered over a red collared shirt. A bright, upbeat female Mandarin voice-over cuts through the silence, cheerfully announcing, \"We caught a fish, and even got an unexpected bonus.\" Before the words fully settle, a large, silvery fish arcs down from above and slams onto the left man’s chest and face, sending a violent splash of water across his clothes. He flinches sharply, eyes widening and jaw dropping as droplets glisten in the harsh frontal glow, while the man on the right recoils a step, eyebrows raised and mouth agape.\n\nStill dripping and disheveled, the left man jerks his head back, locks eyes forward, and shouts in a startled, high-pitched American accent, \"What the hell are you doing?\" The forest remains visually and acoustically silent aside from his accusatory outburst. The shot abruptly cuts to a static close-up of a third man, framed against the pitch-black void. He has light brown wavy hair, a touch of stubble, and wears a dark leather-like jacket, with the blurred outline of a small tan stuffed bear head resting in the lower-left foreground. Meeting the camera with calm confidence, he replies in a measured, matter-of-fact tone, \"I toss it, you grab it. That’s your part of the deal.\" The scene holds on his steady gaze, leaving the tense standoff unresolved as the audio fades into silence.","video_1_relative_path":"videos/50c3b02a9413c70d.mp4","video_2_relative_path":"videos/628cdb91f22f18a5.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_davinci/multitalker/multitalker_4/example.json::00000018","text_prompt":"A quiet domestic drama unfolds in a static eye-level medium frame, shot on a soft, naturalistic palette with diffuse indoor lighting that gradually shifts to cool daylight. Inside a modest dining-kitchen, a young East Asian man in his late twenties stands beside a light-colored upholstered chair, wearing a plush dark-blue bathrobe with grey faux-fur trim over a pale blue T-shirt. His tousled dark hair and slightly furrowed brow convey a tired, mildly exasperated demeanor. Leaning forward with his left hand resting on the chair back, he addresses someone off-screen in a gentle but weary tone, stating, \"From now on, you shouldn't cook anymore.\" The room holds a quiet, intimate stillness, with a white refrigerator adorned with colorful magnets and framed family photos, a small potted plant, and a wooden cabinet topped with a lace-draped microwave forming a warm, lived-in backdrop.\n\nA straight cut transitions to a brighter, adjacent kitchen space where an older East Asian man in his late sixties stands near a counter. Bathed in natural daylight streaming through a large window behind him, his thinning dark hair visible, he wears an olive-green zip-up jacket over a darker shirt. His expression is subdued and almost apologetic as he looks downward, offering a slight right-hand gesture toward the counter while responding in a calm, measured voice, \"I noticed none of you were up; I wanted you to sleep a bit longer.\" The camera remains steady, capturing tiled walls, hanging dish towels, and neatly arranged utensils. The exchange concludes in quiet stillness, the recurring domestic details and shifting light underscoring a quiet tension of mutual concern and everyday household care.","video_1_relative_path":"videos/3f742f17768c10b8.mp4","video_2_relative_path":"videos/533d8dd59f7401dd.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_davinci/multitalker/multitalker_4/example.json::00000086","text_prompt":"A static high-angle wide shot opens on an ornate East-Asian town at night, where traditional wooden buildings with dark tiled roofs line a gently flowing canal. A stone arch bridge spans the water in the mid-ground, its railings draped in greenery and small white flowers, while dozens of red-and-white paper lanterns hang from eaves, poles, and the bridge itself, casting a warm amber glow that reflects off the rippling surface. In the immediate foreground, two figures stand side-by-side on a balcony with their backs to the camera, gazing out over the scene. The figure on the left wears a pale lavender-to-white gradient robe with long dark hair tied in a high ponytail adorned with a silver ornament, while the figure on the right is dressed in a plain white robe, their hair gathered into an elaborate up-do secured by a floral pin. The air hums with a low, distant murmur of a lively night market, underscored by a soft, slow-tempo arrangement of plucked guzheng strings and airy dizi flute that establishes a calm yet wistful mood. A calm, reflective adult male voice in Standard Mandarin begins, his medium-low pitch carrying a quiet relief as he states, \"终于尘埃落定。\"\n\nThe camera remains fixed as faint lantern light sways in the breeze and petals drift across the canal. The man turns his head slightly toward his companion, his lips moving with measured precision before he speaks again, his steady moderate pace and subtle breathiness conveying a sense of forward hope: \"等去浊修好法器，我们就能回去了。\" As the final words fade, he completes his turn back toward the view, and both figures stand perfectly still, silhouetted against the glowing lanterns. The floating candle-lit lotus lamps glide farther downstream, their flickering reflections shimmering across the dark water while the traditional instrumental bed and distant crowd murmur persist uninterrupted. The scene holds on this contemplative tableau, the warm yellows and oranges of the lanterns contrasting beautifully with the cool purples and whites of the foreground robes, before the image gently fades to black, leaving only the lingering resonance of the adagio score and the quiet promise of a journey about to resume.","video_1_relative_path":"videos/35885e1b6a852ebb.mp4","video_2_relative_path":"videos/ffbeb3834fc14261.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_davinci/multitalker/multitalker_8/example.json::00000064","text_prompt":"Cinematic medium two-shot set in a sophisticated fine-dining restaurant, bathed in warm amber light from wall sconces and candle-lit tables. The camera remains locked off, framing two men seated across a round table draped in white linen, surrounded by empty wine glasses, polished silverware, and a small square glass candle holder. Behind them, a vintage-style poster reading “TUSCANY” hangs above a wine rack, softly blurred by a moderate depth of field that keeps the subjects sharp. The man on the left, with dark hair and wearing a black blazer over an open-collared white shirt, begins speaking with confident ease in a clear American English accent, raising both hands to shoulder height with palms outward. He states, “A well-dressed person.” His companion on the right, fair-skinned with neatly styled light-brown hair and dressed in a dark jacket over a charcoal T-shirt, listens attentively, offering a slight nod. The left speaker lowers his hands briefly before gesturing again, continuing with smooth, measured pacing, “A good-looking surrounding.” The right man responds promptly in a slightly lower register, “Yes,” maintaining steady eye contact with a calm, engaged expression. As the conversation flows, the left speaker brings his hands together in front of his chest, fingers loosely interlaced, then separates them to emphasize his final thought. With mild enthusiasm, he says, “I like to be in places that have style.” The right man shifts his gaze downward toward the tabletop for a moment before returning his focus to his companion, the clean, close-mic audio capturing only their crisp dialogue against the intimate, low-key lighting.","video_1_relative_path":"videos/0b95d839b0fc3ff2.mp4","video_2_relative_path":"videos/48659ee2b58dff3a.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_davinci/voiceover/voiceover_1/example.json::00000027","text_prompt":"A contemplative, dialogue-driven cinematic scene opens in a modest, fluorescent-lit cafeteria, rendered on a 50mm lens with a shallow depth of field and a cool, neutral palette that isolates an older East Asian man seated at a small table. He wears a dark-grey, high-collared button-front shirt and holds bright-green chopsticks poised above a white bowl, with a clear glass jar of fresh scallion stalks resting to his left against a softly blurred background of muted patrons. Cool, flat illumination casts gentle shadows across his weathered features as a calm, faintly sardonic female voice-over in Mandarin begins, stating “The funeral broker is responsible for liberating the living.” The ambient room tone remains barely audible, keeping the focus entirely on the philosophical premise. Without cutting away, the older man’s brows knit and his mouth forms a questioning shape as he replies in Cantonese, his measured delivery tinged with incredulity: “How can a living person possibly be liberated?”\n\nA straight cut shifts to a medium close-up of a younger East Asian man facing him off-screen, his shoulder-length black hair parted to one side, wearing black-rimmed glasses, a white collared shirt, and a dark blazer. Warm, directional side-lighting from camera right highlights the left side of his face while leaving the opposite cheek in gentle shadow, contrasting with the elder’s cooler illumination. As his expression shifts from a brief, wry smile to a firm, earnest gaze, he speaks in Cantonese with clear articulation and emphatic cadence: “Even the living need to break through hell.” The background dissolves into indistinct yellow and red shapes, suggesting wall décor, while the audio strips away all music and diegetic noise to leave only his resonant voice hanging in the silence. The scene holds on his impassioned declaration before the image freezes for a fraction of a second and fades to black, underscoring a generational debate on mortality, spiritual redemption, and the quiet tension between detached tradition and urgent human need.","video_1_relative_path":"videos/aadaa8f0029961f9.mp4","video_2_relative_path":"videos/a6cab237d11b59d2.mp4","human_preference_answer":"video 1 is better"}
{"case_id":"ovi_ltx/instruments/instruments_2/example.json::00000001","text_prompt":"Cinematic close-up in a professional recording booth, captured with a 50mm lens, warm overhead lighting, and a shallow depth of field that softly blurs wood-paneled walls and acoustic foam. A young man in a white T-shirt and black over-ear headphones holds a light-brown wooden transverse flute horizontally before a large-diaphragm condenser microphone fitted with a circular pop filter. As the camera begins a slow, deliberate push-in, he draws a measured breath and releases a bright, airy pentatonic melody that rises from a mid-register G into the upper register at a steady, flowing pace. His fingers move with practiced fluidity, the left thumb shifting subtly for pitch bends while the right hand articulates quick sixteenth-note figures, the sound clean and intimate with only the faintest proximity warmth and breath noise framing each phrase.\n\nThe performance intensifies as rapid ascending runs climb through the flute’s higher register, his right-hand fingers blurring slightly with each swift lift while the left index flicks off keys to accentuate crisp staccato attacks. The melodic line weaves between short, punchy bursts and sustained tones, creating a call-and-response rhythm entirely within the solo instrument, underscored by visible chest expansion and controlled embouchure shaping that drive dynamic swells. Nearing the peak, he leans fractionally toward the microphone, his breathing growing more pronounced before the melody executes a dramatic upward leap followed by an ornamental cascade downward. The phrase resolves on a held high E, sustained with gentle vibrato before he releases the tone and allows it to decay naturally, his hands relaxing away from the instrument as he exhales and lowers the flute with a faint, satisfied smile.\n\nAs the final resonance fades into the quiet studio, the camera holds steady on the performer, capturing the subtle key clicks and soft intake of breath that linger in the clean, low-noise capture. The warm lighting continues to trace the contours of the wooden flute and his relaxed posture, emphasizing the physical engagement behind every technical flourish. The scene closes on this intimate portrait of focused artistry, leaving only the gentle room ambience and the lingering warmth of a masterfully executed solo performance.","video_1_relative_path":"videos/fea0853e114bbe4e.mp4","video_2_relative_path":"videos/1ee07802fe0e4ada.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/instruments/instruments_3/example.json::00000000","text_prompt":"Cinematic vertical medium shot, softly lit domestic living room with a neutral white-and-brown palette. A young boy stands centered, dressed in a bright blue zip-up fleece over a yellow T-shirt and light grey trousers, his feet planted shoulder-width apart for balance. Behind him, a large pink plush toy rests motionless on a dark wooden bench. He holds a tenor trombone with its golden bell angled camera-right and the silver slide extending diagonally toward the floor. His left hand cradles the instrument’s lower section while his right grips the slide handle. With a firm circular embouchure and slightly hollowed cheeks, he draws a steady breath, and a faint lip buzz gives way to a warm, immediate low brass tone. The camera remains fixed, preserving an intimate focus on the reflective brass catching soft highlights as the boy’s concentrated gaze locks forward.\n\nThe performance unfolds at a steady, moderate tempo as the boy embarks on a measured melodic line in the lower-middle register. Each note is articulated with a deliberate legato feel, his right hand executing small, controlled slide glides that synchronize precisely with the pitch shifts. Breath support remains diaphragmatic and unwavering, yielding a consistent volume that avoids sudden swells or dips. The melody traces a simple, folk-like contour: an introductory motif rises through stepwise intervals before settling into a descending cadence. The camera captures the subtle micro-adjustments of his fingers and the slight, rhythmic sway of his torso, while the audio remains a clean, close-mic capture of solo brass resonance. Warm fundamentals dominate the low frequencies, with a modest midrange presence adding clarity, all set against a silent environment free of mechanical clicks or ambient noise.\n\nAs the phrase reaches its brief ascent, the boy’s head tilts fractionally upward and his embouchure firms, producing the excerpt’s highest sustained note with a mild dynamic swell. He then guides the slide back inward, stepping down through a smooth descending figure that resolves cleanly onto a final low tonic. The bell angles slightly upward as his posture relaxes minutely, and the air tapers off into a natural, unadorned decay that lingers for a second before fading completely. The frame never shifts, leaving only the quiet intimacy of the performance, the steady rhythm of his breath, and the mellow, resonant voice of the trombone echoing softly in the still room.","video_1_relative_path":"videos/f8fb09a0bc3405e9.mp4","video_2_relative_path":"videos/f5415777b45acdcb.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/movie/movie_3/example.json::00000003","text_prompt":"A sleek science-fiction nocturnal tableau opens on a high-angle wide shot of a dense urban skyline, where dark skyscraper silhouettes stand against a black sky, punctuated by scattered yellow and white windows. The camera executes a slow, upward tilt and gentle pan over a major avenue below, where streams of vehicle headlights and taillights paint long, luminous streaks across the asphalt, illuminated by pools of warm streetlight. A faint, low-frequency electronic hum underpins the scene, hinting at hidden machinery or advanced infrastructure. Suddenly, a brilliant golden-white energy beam erupts from the left edge, slicing horizontally across the frame with violent dynamism. The thick, glowing projectile emits a powerful whooshing sound that rises in pitch and volume as it traverses the city, casting dynamic, sweeping highlights across adjacent building facades while lens flares and motion blur accentuate its blinding speed.\n\nRiding above the ambient hum and the growing intensity of the beam’s passage, a calm, mid-to-high pitched female voice with clear diction and a slightly speculative tone remarks, “Well, assuming the arc reactor takes over and it actually works.” The beam continues its rapid trajectory toward the right, leaving a lingering trail of light and heat haze between the structures, while a deeper, resonant thrumming merges with the foundational electronic drone. As the energy trail fades and the frame settles back onto the steady, quiet cityscape below, a low-pitched, gravelly male voice cuts in with a clipped, matter-of-fact delivery: “I assume.” The scene holds briefly on the darkened skyline, the ambient hum persisting until the image gently dissolves, leaving behind a mood of tense anticipation and awe at the unseen technological force that just tore through the night.","video_1_relative_path":"videos/56a93a4ede7a4dfe.mp4","video_2_relative_path":"videos/338f810fa3008784.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/movie/movie_3/example.json::00000078","text_prompt":"Atmospheric thriller. A wide, static cinematic shot opens on a lakeshore at dusk or dawn, framed by heavy, cloud-choked skies and a low, warm orange horizon glow that reflects across the calm water. In the distance, a massive fire rages on a hillside, sending thick columns of black smoke into the air while smaller flames dot the shoreline below. Silhouetted against this dramatic inferno, a crowd of roughly twenty figures stands motionless on the rocky and sandy shore, clad in dark, period-appropriate coats, hats, and dresses, their attention fixed on the burning horizon. To the right, a small wooden shed rests on a narrow pier extending into the water, with two solitary figures standing quietly near its edge. The camera remains completely still, allowing the steady flicker of the flames and the slow drift of smoke to dominate the frame while the orange light casts long, sharp shadows and highlights the subtle ripples on the water’s surface.\n\nThe soundscape opens immediately with a deep, resonant rumble that feels both mechanical and environmental, echoing like distant thunder or the low-frequency vibration of massive machinery, layered over by a faint, continuous high-pitched electronic whine. There is no dialogue, music, wind, or natural ambient noise; the acoustic space is entirely filled by these two sustained tones, which sit in an open, echo-free outdoor environment to create a heavy, foreboding tension. As the scene holds its static composition and the observers remain frozen in quiet dread, the audio persists without fluctuation, building a minimalist atmosphere of suspended time and impending doom. The clip concludes with both the visual tableau and the dual-toned soundscape remaining unchanged until the tones cut off abruptly, leaving the moment suspended in unresolved unease.","video_1_relative_path":"videos/fc6f3571b4a808b4.mp4","video_2_relative_path":"videos/20a82dea6f393658.mp4","human_preference_answer":"video 2 is better"}
{"case_id":"ovi_ltx/movie/movie_5/example.json::00000006","text_prompt":"Cinematic thriller sequence, shot on a close-up lens with low, warm-toned lighting that casts deep shadows to obscure the background while accentuating gritty foreground textures. The scene unfolds in a dimly lit, confined subterranean space, possibly a ruined tunnel or cave, where a lone figure lies face-down in dry, fine-grained sand, partially buried. Long, matted grayish-white hair spills across their shoulders and the uneven ground, while dark, rugged tactical gear with visible straps and buckles rests across their back and shoulders. The camera executes a slow, deliberate pan from left to right, gradually revealing more of the figure’s upper body and the disturbed sand around them. The individual’s right arm extends forward into the grit, fingers splayed, and shifts subtly as if struggling to push deeper into the earth, sending small clumps of sand scattering.\n\nAn ominous male voice-over begins in English, his delivery slow, deliberate, and gravelly, stating \"One who runs from both the living and the dead.\" The narration is underscored by a continuous, low-frequency musical drone that fills the enclosed, reverberant space, amplifying the isolation. As the camera continues its pan, the subtle rustling of gear against sand and a sharp metallic scrape punctuate the figure’s faint movements. The narrator’s voice drops to a commanding whisper, uttering \"Hunt,\" which coincides with a sudden swell of a rising string motif that crescendos briefly before fading into the lingering drone. The interplay of restrained camera work, tactile environmental sounds, and the haunting monologue cultivates an atmosphere of profound dread and anticipation, leaving the figure’s identity and circumstances shrouded in mystery.","video_1_relative_path":"videos/320fff19c1073370.mp4","video_2_relative_path":"videos/ed631d9924dd2dc2.mp4","human_preference_answer":"video 2 is better"}