Update app.py

app.py

@@ -36,7 +36,7 @@ def video_processor(video):
     # 创建一个VideoWriter对象，输出为mp4格式
     fourcc = cv2.VideoWriter_fourcc(*'avc1')
     out = cv2.VideoWriter(os.path.join(d,'output.mp4'), fourcc, fps, (width, height))
-
+    print(os.path.exists(os.path.join(d,'output.mp4')))
     # 创建一个图形对象
     fig, ax = plt.subplots(figsize=(3, 3))