Add limitations

app.py

@@ -195,7 +195,8 @@ def extract_faces(video_file):
     clip = ImageSequenceClip(
         [cv2.cvtColor(cv2.resize(f, (224, 224)), cv2.COLOR_BGR2RGB) for f in frames],
         fps=fps
-    ).fx(vfx.flip_vertical)
+    )
+    clip = vfx.flip_vertical(clip)
     clip.write_videofile(output_path, codec="libx264", audio=False, fps=25)
 
     # Save audio from original, resampled to 16kHz