Update app.py

app.py

@@ -222,7 +222,7 @@ async def transcript_to_speech(transcript_text, voice, rate, pitch):
                 if i > 0:
                     previous_line_match = re.match(r'(\d{2}):(\d{2}):(\d{2}),(\d{3})\s+.*', lines[i-1])
                     if previous_line_match:
-                        prev_h, prev_m, prev_s, prev_ms, _ = previous_line_match.groups()
+                        prev_h, prev_m, prev_s, prev_ms = previous_line_match.groups()
                         previous_start_time_ms = (
                             int(prev_h) * 3600000 +
                             int(prev_m) * 60000 +
@@ -310,4 +310,4 @@ async def create_demo():
 if __name__ == "__main__":
     demo = asyncio.run(create_demo())
     demo.launch()
- 
+