{ "id": "07824bbb-6672-4bb0-ac36-4313a519e35b", "revision": 0, "last_node_id": 329, "last_link_id": 646, "nodes": [ { "id": 103, "type": "MarkdownNote", "pos": [ -1220, 3530 ], "size": [ 750, 1200 ], "flags": {}, "order": 0, "mode": 0, "inputs": [], "outputs": [], "title": "Model Links", "properties": { "ue_properties": { "widget_ue_connectable": {}, "version": "7.7", "input_ue_unconnectable": {} } }, "widgets_values": [ "- Huggingface: [Lightricks/LTX-2.3](https://huggingface.co/Lightricks/LTX-2.3/)\n- Github: [LTX-2](https://github.com/Lightricks/LTX-2)\n\n## LTX-2.3 Prompting Tips\n\n1. **Core Actions**: Describe events and actions as they occur over time \n2. **Visual Details**: Describe all visual details you want to appear in the video \n3. **Audio**: Describe sounds and dialogue needed for the scene\n\n## Report LTX-2.3 Issues\nTo report any issues when running this workflow, [go to GitHub](https://github.com/Lightricks/ComfyUI-LTXVideo/issues)\n\n## Model Links (for Local Users)\n\n**checkpoints**\n\n- [ltx-2.3-22b-dev.safetensors](https://huggingface.co/Lightricks/LTX-2.3/resolve/main/ltx-2.3-22b-dev.safetensors)\n\n**loras**\n\n- [ltx_2.3_22b_distilled_1.1_lora_dynamic_fro09_avg_rank_111_bf16.safetensors](https://huggingface.co/Comfy-Org/ltx-2.3/resolve/main/split_files/loras/ltx_2.3_22b_distilled_1.1_lora_dynamic_fro09_avg_rank_111_bf16.safetensors)\n- [gemma-3-12b-it-abliterated_lora_rank64_bf16.safetensors](https://huggingface.co/Comfy-Org/ltx-2/resolve/main/split_files/loras/gemma-3-12b-it-abliterated_lora_rank64_bf16.safetensors)\n\n**latent_upscale_models**\n\n- [ltx-2.3-spatial-upscaler-x2-1.1.safetensors](https://huggingface.co/Lightricks/LTX-2.3/resolve/main/ltx-2.3-spatial-upscaler-x2-1.1.safetensors)\n\n\n## Model Storage Location\n\n```\n\ud83d\udcc2 ComfyUI/\n\u251c\u2500\u2500 \ud83d\udcc2 models/\n\u2502 \u251c\u2500\u2500 \ud83d\udcc2 checkpoints/\n\u2502 \u2502 \u2514\u2500\u2500 ltx-2.3-22b-dev.safetensors\n\u2502 \u251c\u2500\u2500 \ud83d\udcc2 loras/\n\u2502 \u2502 \u251c\u2500\u2500 ltx_2.3_22b_distilled_1.1_lora_dynamic_fro09_avg_rank_111_bf16.safetensors\n\u2502 \u2502 \u2514\u2500\u2500 gemma-3-12b-it-abliterated_lora_rank64_bf16.safetensors\n\u2502 \u2514\u2500\u2500 \ud83d\udcc2 latent_upscale_models/\n\u2502 \u2514\u2500\u2500 ltx-2.3-spatial-upscaler-x2-1.1.safetensors\n```\n\n## Report Issue\n\nNote: Please update ComfyUI first ([guide](https://docs.comfy.org/installation/update_comfyui)) and prepare required models. Desktop/Cloud updates follow stable releases, so some nightly-supported models may not be available yet.\n\n- Cannot run / runtime errors: [ComfyUI/issues](https://github.com/Comfy-Org/ComfyUI/issues)\n- UI / frontend issues: [ComfyUI_frontend/issues](https://github.com/Comfy-Org/ComfyUI_frontend/issues)\n- Workflow issues: [workflow_templates/issues](https://github.com/Comfy-Org/workflow_templates/issues)\n" ], "color": "#222", "bgcolor": "#000" }, { "id": 269, "type": "LoadImage", "pos": [ -440, 3530 ], "size": [ 410, 530 ], "flags": {}, "order": 1, "mode": 0, "inputs": [], "outputs": [ { "name": "IMAGE", "type": "IMAGE", "links": [ 633 ] }, { "name": "MASK", "type": "MASK", "links": null } ], "properties": { "enableTabs": false, "tabWidth": 65, "tabXOffset": 10, "hasSecondTab": false, "secondTabText": "Send Back", "secondTabOffset": 80, "secondTabWidth": 65, "cnr_id": "comfy-core", "ver": "0.16.3", "Node name for S&R": "LoadImage", "ue_properties": { "widget_ue_connectable": {}, "version": "7.7", "input_ue_unconnectable": {} } }, "widgets_values": [ "egyptian_queen.png", "image" ] }, { "id": 75, "type": "SaveVideo", "pos": [ 430, 3530 ], "size": [ 660, 580 ], "flags": { "collapsed": false }, "order": 3, "mode": 0, "inputs": [ { "name": "video", "type": "VIDEO", "link": 632 } ], "outputs": [], "properties": { "enableTabs": false, "tabWidth": 65, "tabXOffset": 10, "hasSecondTab": false, "secondTabText": "Send Back", "secondTabOffset": 80, "secondTabWidth": 65, "cnr_id": "comfy-core", "ver": "0.5.1", "Node name for S&R": "SaveVideo", "ue_properties": { "widget_ue_connectable": {}, "version": "7.7", "input_ue_unconnectable": {} } }, "widgets_values": [ "video/LTX_2.3_i2v", "auto", "auto" ] }, { "id": 320, "type": "2454ad83-157c-40dd-9f19-5daaf4041ce0", "pos": [ 10, 3530 ], "size": [ 380, 650 ], "flags": {}, "order": 2, "mode": 0, "inputs": [ { "label": "first_frame", "name": "input", "type": "IMAGE,MASK", "link": 633 }, { "label": "prompt", "name": "value", "type": "STRING", "widget": { "name": "value" }, "link": null }, { "label": "prompt_enhance", "name": "value_1", "type": "BOOLEAN", "widget": { "name": "value_1" }, "link": null }, { "label": "width", "name": "value_2", "type": "INT", "widget": { "name": "value_2" }, "link": null }, { "label": "height", "name": "value_3", "type": "INT", "widget": { "name": "value_3" }, "link": null }, { "label": "duration", "name": "value_4", "type": "INT", "widget": { "name": "value_4" }, "link": 634 }, { "label": "fps", "name": "value_5", "type": "INT", "widget": { "name": "value_5" }, "link": null }, { "label": "seed", "name": "noise_seed", "type": "INT", "widget": { "name": "noise_seed" }, "link": null }, { "label": "distilled_lora", "name": "lora_name", "type": "COMBO", "widget": { "name": "lora_name" }, "link": null }, { "label": "text_encoder", "name": "text_encoder", "type": "COMBO", "widget": { "name": "text_encoder" }, "link": null }, { "label": "latent_upscale_model", "name": "model_name", "type": "COMBO", "widget": { "name": "model_name" }, "link": null }, { "label": "lora", "name": "lora_name_1", "type": "COMBO", "widget": { "name": "lora_name_1" }, "link": null } ], "outputs": [ { "name": "VIDEO", "type": "VIDEO", "links": [ 632 ] } ], "properties": { "proxyWidgets": [ [ "319", "value" ], [ "328", "value" ], [ "312", "value" ], [ "299", "value" ], [ "301", "value" ], [ "300", "value" ], [ "277", "noise_seed" ], [ "316", "ckpt_name" ], [ "285", "lora_name" ], [ "317", "text_encoder" ], [ "311", "model_name" ], [ "324", "lora_name" ] ], "enableTabs": false, "tabWidth": 65, "tabXOffset": 10, "hasSecondTab": false, "secondTabText": "Send Back", "secondTabOffset": 80, "secondTabWidth": 65, "cnr_id": "comfy-core", "ver": "0.16.3", "ue_properties": { "widget_ue_connectable": { "value_1": true, "value_2": true, "value_3": true, "value_4": true, "lora_name": true, "model_name": true, "value_5": true }, "version": "7.7", "input_ue_unconnectable": {} } }, "widgets_values": [] }, { "id": 340, "type": "PrimitiveInt", "pos": [ -560, 340 ], "size": [ 340, 90 ], "flags": {}, "order": 0, "mode": 0, "inputs": [ { "localized_name": "value", "name": "value", "type": "INT", "widget": { "name": "value" }, "link": null } ], "outputs": [ { "localized_name": "INT", "name": "INT", "type": "INT", "links": [ 634 ] } ], "properties": { "cnr_id": "comfy-core", "ver": "0.3.0", "Node name for S&R": "PrimitiveInt" }, "widgets_values": [ 5, "fixed" ], "title": "DURATION_SECONDS (max 10)" }, { "id": 341, "type": "MarkdownNote", "pos": [ -560, 480 ], "size": [ 340, 180 ], "flags": {}, "order": 0, "mode": 0, "inputs": [], "outputs": [], "properties": {}, "title": "Duration note", "widgets_values": [ "## Video length\nSet **DURATION_SECONDS** above (API: `--set 340.value=N`).\n\n**Ceiling: 10 s** \u2014 enforced by a clamp inside the subgraph. LTX 2.3 is trained for clips up to ~10 s; beyond that motion coherence and quality degrade.\n\nVRAM grows with length: fp8 ~67 GB at 8 s; **bf16 peaks ~75 GB at just 5 s** \u2014 use the fp8 workflow for 8-10 s clips.\n\nFrames = duration x fps + 1, snapped to the VAE temporal grid (so 5 s -> 4.84 s actual)." ] } ], "links": [ [ 632, 320, 0, 75, 0, "VIDEO" ], [ 633, 269, 0, 320, 0, "IMAGE" ], [ 634, 340, 0, 320, 5, "INT" ] ], "groups": [], "definitions": { "subgraphs": [ { "id": "2454ad83-157c-40dd-9f19-5daaf4041ce0", "version": 1, "state": { "lastGroupId": 26, "lastNodeId": 329, "lastLinkId": 646, "lastRerouteId": 0 }, "revision": 0, "config": {}, "name": "Image to Video (LTX-2.3)", "inputNode": { "id": -10, "bounding": [ 730, 4110, 170.162109375, 308 ] }, "outputNode": { "id": -20, "bounding": [ 6590, 4360, 128, 68 ] }, "inputs": [ { "id": "7afd6ea8-c738-4fd9-97b8-66fa905cd381", "name": "input", "type": "IMAGE,MASK", "linkIds": [ 535, 700 ], "localized_name": "input", "label": "first_frame", "pos": [ 876.162109375, 4134 ] }, { "id": "9494c550-4172-49c6-930e-5b508f775e77", "name": "value", "type": "STRING", "linkIds": [ 595 ], "label": "prompt", "pos": [ 876.162109375, 4154 ] }, { "id": "ec291311-2d21-49f9-aaba-24bb2e544ce0", "name": "value_1", "type": "BOOLEAN", "linkIds": [ 644 ], "label": "prompt_enhance", "pos": [ 876.162109375, 4174 ] }, { "id": "58dbb3f6-f924-4548-96ef-e0e34610bd4e", "name": "value_2", "type": "INT", "linkIds": [ 597 ], "label": "width", "pos": [ 876.162109375, 4194 ] }, { "id": "6086d5b8-2586-448c-a641-dd14d76dd102", "name": "value_3", "type": "INT", "linkIds": [ 598 ], "label": "height", "pos": [ 876.162109375, 4214 ] }, { "id": "feb8c2eb-ae48-4fa8-bc24-929552d656c3", "name": "value_4", "type": "INT", "linkIds": [ 599 ], "label": "duration", "pos": [ 876.162109375, 4234 ] }, { "id": "3e32ce15-0ae7-4cd0-909f-a354e8e9c4c9", "name": "value_5", "type": "INT", "linkIds": [ 624 ], "label": "fps", "pos": [ 876.162109375, 4254 ] }, { "id": "dc40eadf-b8a9-421e-88f6-245042dd5424", "name": "noise_seed", "type": "INT", "linkIds": [ 646 ], "label": "seed", "pos": [ 876.162109375, 4274 ] }, { "id": "d7255058-319a-4880-8f9a-7e542c8f3c3c", "name": "ckpt_name", "type": "COMBO", "linkIds": [ 601, 604, 605 ], "pos": [ 876.162109375, 4294 ] }, { "id": "4afce68d-8f65-4342-9d6d-ae0a7688c3e3", "name": "lora_name", "type": "COMBO", "linkIds": [ 602 ], "label": "distilled_lora", "pos": [ 876.162109375, 4314 ] }, { "id": "ab842b4b-c977-4679-b421-424722785b57", "name": "text_encoder", "type": "COMBO", "linkIds": [ 606 ], "label": "text_encoder", "pos": [ 876.162109375, 4334 ] }, { "id": "9e47372d-28d9-4311-91e9-e90d03f4eb43", "name": "model_name", "type": "COMBO", "linkIds": [ 607 ], "label": "latent_upscale_model", "pos": [ 876.162109375, 4354 ] }, { "id": "682e457c-5d94-49b2-bf40-5731696deaf0", "name": "lora_name_1", "type": "COMBO", "linkIds": [ 645 ], "label": "lora", "pos": [ 876.162109375, 4374 ] } ], "outputs": [ { "id": "954ef307-c897-4eea-8b5c-5c6ce15a5357", "name": "VIDEO", "type": "VIDEO", "linkIds": [ 536 ], "localized_name": "VIDEO", "pos": [ 6614, 4384 ] } ], "widgets": [], "nodes": [ { "id": 276, "type": "RandomNoise", "pos": [ 4700, 3650 ], "size": [ 280, 110 ], "flags": {}, "order": 0, "mode": 0, "inputs": [], "outputs": [ { "localized_name": "NOISE", "name": "NOISE", "type": "NOISE", "links": [ 490 ] } ], "properties": { "enableTabs": false, "tabWidth": 65, "tabXOffset": 10, "hasSecondTab": false, "secondTabText": "Send Back", "secondTabOffset": 80, "secondTabWidth": 65, "cnr_id": "comfy-core", "ver": "0.3.75", "Node name for S&R": "RandomNoise", "ue_properties": { "widget_ue_connectable": {}, "version": "7.7", "input_ue_unconnectable": {} } }, "widgets_values": [ 42, "fixed" ] }, { "id": 277, "type": "RandomNoise", "pos": [ 3160, 3630 ], "size": [ 280, 110 ], "flags": {}, "order": 6, "mode": 0, "inputs": [ { "localized_name": "noise_seed", "name": "noise_seed", "type": "INT", "widget": { 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"tabWidth": 65, "tabXOffset": 10, "hasSecondTab": false, "secondTabText": "Send Back", "secondTabOffset": 80, "secondTabWidth": 65, "cnr_id": "comfy-core", "ver": "0.5.1", "Node name for S&R": "LTXVConcatAVLatent", "ue_properties": { "widget_ue_connectable": {}, "version": "7.7", "input_ue_unconnectable": {} } }, "widgets_values": [] }, { "id": 279, "type": "LTXVAudioVAELoader", "pos": [ 1660, 4100 ], "size": [ 430, 110 ], "flags": {}, "order": 8, "mode": 0, "inputs": [ { "localized_name": "ckpt_name", "name": "ckpt_name", "type": "COMBO", "widget": { "name": "ckpt_name" }, "link": 604 } ], "outputs": [ { "localized_name": "Audio VAE", "name": "Audio VAE", "type": "VAE", "links": [ 481, 496 ] } ], "properties": { "enableTabs": false, "tabWidth": 65, "tabXOffset": 10, "hasSecondTab": false, "secondTabText": "Send Back", "secondTabOffset": 80, "secondTabWidth": 65, "cnr_id": "comfy-core", "ver": "0.3.68", "Node name for S&R": "LTXVAudioVAELoader", "models": [ { "name": 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280, 110 ], "flags": {}, "order": 2, "mode": 0, "inputs": [], "outputs": [ { "localized_name": "SIGMAS", "name": "SIGMAS", "type": "SIGMAS", "links": [ 493 ] } ], "properties": { "enableTabs": false, "tabWidth": 65, "tabXOffset": 10, "hasSecondTab": false, "secondTabText": "Send Back", "secondTabOffset": 80, "secondTabWidth": 65, "cnr_id": "comfy-core", "ver": "0.5.1", "Node name for S&R": "ManualSigmas", "ue_properties": { "widget_ue_connectable": {}, "version": "7.7", "input_ue_unconnectable": {} } }, "widgets_values": [ "0.85, 0.7250, 0.4219, 0.0" ] }, { "id": 282, "type": "CFGGuider", "pos": [ 4700, 3850 ], "size": [ 280, 160 ], "flags": {}, "order": 9, "mode": 0, "inputs": [ { "localized_name": "model", "name": "model", "type": "MODEL", "link": 478 }, { "localized_name": "positive", "name": "positive", "type": "CONDITIONING", "link": 479 }, { "localized_name": "negative", "name": "negative", "type": "CONDITIONING", "link": 480 } ], "outputs": [ { "localized_name": "GUIDER", 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