Update app.py

app.py

@@ -243,27 +243,21 @@ form.addEventListener("submit", async (e)=>{
 """
 
 def ass_time(seconds: float) -> str:
-
     if seconds < 0:
         seconds = 0
-
     h = int(seconds // 3600)
     m = int((seconds % 3600) // 60)
     s = seconds % 60
-
     return f"{h}:{m:02d}:{s:05.2f}"
 
 def ass_escape(text: str) -> str:
-
     text = text.replace("\\", "\\\\")
     text = text.replace("{", "\\{")
     text = text.replace("}", "\\}")
     text = text.replace("\n", " ")
-
     return text
 
 def escape_ffmpeg_path(path: str) -> str:
-
     return (
         path
         .replace("\\", "\\\\")
@@ -271,8 +265,29 @@ def escape_ffmpeg_path(path: str) -> str:
         .replace("'", r"\'")
     )
 
-def make_ass_subtitles(segments, ass_path):
+def wrap_caption_text(text: str) -> str:
+    text = text.strip()
+
+    # shorter wrap widths to prevent left/right crop
+    if len(text) <= 20:
+        width = 14
+    elif len(text) <= 40:
+        width = 18
+    elif len(text) <= 70:
+        width = 22
+    elif len(text) <= 110:
+        width = 26
+    else:
+        width = 30
+
+    return textwrap.fill(
+        text,
+        width=width,
+        break_long_words=False,
+        break_on_hyphens=False
+    )
 
+def make_ass_subtitles(segments, ass_path):
     header = """[Script Info]
 ScriptType: v4.00+
 PlayResX: 1080
@@ -283,7 +298,7 @@ WrapStyle: 2
 [V4+ Styles]
 Format: Name, Fontname, Fontsize, PrimaryColour, SecondaryColour, OutlineColour, BackColour, Bold, Italic, Underline, StrikeOut, ScaleX, ScaleY, Spacing, Angle, BorderStyle, Outline, Shadow, Alignment, MarginL, MarginR, MarginV, Encoding
 
-Style: Default,Arial,62,&H00FFFFFF,&H000000FF,&H00000000,&H00000000,1,0,0,0,100,100,0,0,3,0,0,2,90,90,160,1
+Style: Default,Arial,56,&H00FFFFFF,&H000000FF,&H00000000,&H00000000,1,0,0,0,100,100,0,0,3,0,0,2,120,120,150,1
 
 [Events]
 Format: Layer, Start, End, Style, Name, MarginL, MarginR, MarginV, Effect, Text
@@ -292,37 +307,18 @@ Format: Layer, Start, End, Style, Name, MarginL, MarginR, MarginV, Effect, Text
     lines = [header]
 
     for seg in segments:
-
         start = ass_time(seg["start"])
         end = ass_time(seg["end"])
-
         text = seg["text"].strip()
 
         if not text:
             continue
 
-        # Dynamic wrapping
-        if len(text) <= 25:
-            wrap_width = 18
-        elif len(text) <= 60:
-            wrap_width = 24
-        elif len(text) <= 100:
-            wrap_width = 30
-        else:
-            wrap_width = 36
-
-        wrapped = textwrap.fill(
-            text,
-            width=wrap_width,
-            break_long_words=False,
-            break_on_hyphens=False
-        )
-
+        wrapped = wrap_caption_text(text)
         wrapped = ass_escape(wrapped)
-
         wrapped = wrapped.replace("\n", r"\N")
 
-        # Pure white text + solid black box
+        # Solid black box, white text, no glow/blur
         dialogue = (
             f"Dialogue: 0,{start},{end},Default,,0,0,0,,"
             r"{\bord0\shad0\blur0\1c&HFFFFFF&\4c&H000000&}"
@@ -340,7 +336,6 @@ def home():
 
 @app.route("/generate", methods=["POST"])
 def generate():
-
     if "image" not in request.files or "audio" not in request.files:
         return jsonify({"error":"Missing files"})
 
@@ -355,33 +350,16 @@ def generate():
     image_name = secure_filename(image.filename)
     audio_name = secure_filename(audio.filename)
 
-    image_path = os.path.join(
-        UPLOAD_FOLDER,
-        f"{uid}_{image_name}"
-    )
-
-    audio_path = os.path.join(
-        UPLOAD_FOLDER,
-        f"{uid}_{audio_name}"
-    )
-
+    image_path = os.path.join(UPLOAD_FOLDER, f"{uid}_{image_name}")
+    audio_path = os.path.join(UPLOAD_FOLDER, f"{uid}_{audio_name}")
     output_filename = f"{uid}.mp4"
-
-    output_path = os.path.join(
-        OUTPUT_FOLDER,
-        output_filename
-    )
-
-    ass_path = os.path.join(
-        SUBTITLE_FOLDER,
-        f"{uid}.ass"
-    )
+    output_path = os.path.join(OUTPUT_FOLDER, output_filename)
+    ass_path = os.path.join(SUBTITLE_FOLDER, f"{uid}.ass")
 
     image.save(image_path)
     audio.save(audio_path)
 
     try:
-
         # Fast low CPU transcription
         segments_iter, info = model.transcribe(
             audio_path,
@@ -393,9 +371,7 @@ def generate():
         full_text_parts = []
 
         for segment in segments_iter:
-
             text = segment.text.strip()
-
             if not text:
                 continue
 
@@ -404,16 +380,12 @@ def generate():
                 "end": round(segment.end, 2),
                 "text": text
             })
-
             full_text_parts.append(text)
 
         make_ass_subtitles(transcript, ass_path)
+        safe_ass_path = escape_ffmpeg_path(os.path.abspath(ass_path))
 
-        safe_ass_path = escape_ffmpeg_path(
-            os.path.abspath(ass_path)
-        )
-
-        # Optimized low CPU video rendering
+        # No zoompan, only simple scale/crop
         vf = (
             "scale=1080:1920:force_original_aspect_ratio=increase,"
             "crop=1080:1920,"
@@ -423,27 +395,17 @@ def generate():
         cmd = [
             "ffmpeg",
             "-y",
-
             "-loop", "1",
             "-i", image_path,
-
             "-i", audio_path,
-
             "-vf", vf,
-
             "-c:v", "libx264",
-
             "-preset", "ultrafast",
-
             "-pix_fmt", "yuv420p",
-
             "-r", "24",
-
             "-c:a", "aac",
             "-b:a", "128k",
-
             "-shortest",
-
             output_path
         ]
 
@@ -462,17 +424,12 @@ def generate():
         })
 
     except subprocess.CalledProcessError as e:
-
         return jsonify({
             "error":"FFmpeg failed",
-            "details": e.stderr.decode(
-                "utf-8",
-                errors="ignore"
-            )
+            "details": e.stderr.decode("utf-8", errors="ignore")
         })
 
     except Exception as e:
-
         return jsonify({
             "error":"Processing failed",
             "details": str(e)