Update app.py

app.py

@@ -47,7 +47,7 @@ def video_frame_callback(frame):
     output_text = process_video_frame(frame, detector, segmentor, imgList, indexImg, keys, st.session_state)
     # Put the processed output text into the queue
     result_queue.put(output_text)
-    return frame  # Return the processed frame for 
+    return av.VideoFrame.from_ndarray(flipped, format="bgr24")
 
 webrtc_ctx = webrtc_streamer(
     key="keyboard-demo",