update example as well

Author: typester

examples/video-stream/audio_wave.py

@@ -296,6 +296,8 @@ async def main(room: rtc.Room, room_name: str):
     finally:
         audio_task.cancel()
         await av_sync.aclose()
+        audio_source.close()
+        video_source.close()
 
 
 if __name__ == "__main__":

examples/video-stream/video_play.py

@@ -181,6 +181,8 @@ async def _push_frames(
     finally:
         await streamer.aclose()
         await av_sync.aclose()
+        audio_source.close()
+        video_source.close()
 
 
 if __name__ == "__main__":