Update app.py

app.py

@@ -77,7 +77,7 @@ def encode_to_video_fast(frames, fps):
     size = (width, height)
 
     # Define the codec and create VideoWriter object
-    fourcc = cv2.VideoWriter_fourcc(*'h264')  # You can also try 'XVID', 'MJPG', etc.
+    fourcc = cv2.VideoWriter_fourcc(*"mp4v")  # You can also try 'XVID', 'MJPG', etc.
     out = cv2.VideoWriter(video_clip_path, fourcc, fps, size)
 
     for frame in frames: