Update app.py

app.py

@@ -59,7 +59,7 @@ def flip_video_horizontally(video_path):
     frame_width = int(cap.get(cv2.CAP_PROP_FRAME_WIDTH))
     frame_height = int(cap.get(cv2.CAP_PROP_FRAME_HEIGHT))
     fps = int(cap.get(cv2.CAP_PROP_FPS))
-    fourcc = int(cap.get(cv2.CAP_PROP_FOURCC))
+    fourcc = cv2.VideoWriter_fourcc(*'XVID') #int(cap.get(cv2.CAP_PROP_FOURCC))
 
     temp_output_path = video_path + "_temp.mp4"