flip the user video

streamlit_av_queue.py

@@ -50,6 +50,8 @@ class StreamlitAVQueue:
                     frame = self._out_video_frame
                     # resize user image to 1/4 size
                     user_frame = cv2.resize(user_image, (user_image.shape[1]//4, user_image.shape[0]//4), interpolation=cv2.INTER_AREA)
+                    # flip horizontally
+                    user_frame = cv2.flip(user_frame, 1)
                     x_user = 0
                     y_user = frame.shape[0] - user_frame.shape[0]
                     final_frame = frame.copy()