Update app.py

app.py

@@ -29,7 +29,7 @@ def transcribe_video(video_path):
 
 # Create an ASS file with karaoke-style effects.
 # Each segment is split into words; each word gets an ASS karaoke tag (\k)
-# which reveals it gradually over the segment’s duration.
+# which gradually reveals it. The unrevealed text is made fully transparent.
 def create_ass(segments, ass_path):
     header = """[Script Info]
 Title: AI Captioning
@@ -40,8 +40,8 @@ PlayResY: 720
 Timer: 100.0000
 
 [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,36,&H00FFFFFF,&H000000FF,&H00000000,&H64000000,0,0,0,0,100,100,0,0,1,2,0,2,10,10,30,1
+; 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,36,&H00FFFFFF,&HFF000000,&H00000000,&H64000000,0,0,0,0,100,100,0,0,1,2,0,2,10,10,30,1
 
 [Events]
 Format: Layer, Start, End, Style, Name, MarginL, MarginR, MarginV, Effect, Text