Update app.py

app.py

@@ -88,7 +88,7 @@ def get_frames(video_in, step, name, resize_w):
 def create_video(frames, fps, type):
     print("building video result")
     for j, img in enumerate(frames):
-        frames[j] = cv2.cvtColor(cv2.imread(img).astype(np.uint8), cv2.COLOR_RGB2RGBA).astype(np.uint32)
+        frames[j] = cv2.cvtColor(cv2.imread(img).astype(np.uint8), cv2.COLOR_RGB2RGBA)
 
     mediapy.write_video(type + "_result.mp4", frames, fps=fps, codec='hevc', encoded_format='rgba')