diff --git a/rtcllm/aav.py b/rtcllm/aav.py
index 069aa5b..0e6ac1a 100644
--- a/rtcllm/aav.py
+++ b/rtcllm/aav.py
@@ -5,13 +5,25 @@ from aiortc import VideoStreamTrack, AudioStreamTrack
 class MyMediaPlayer(MediaPlayer):
 	pass
 
-class MyAudioStreamTrack(AudioStreamTrack):
+class MyTrackBasea:
 	def __init__(self, source=None):
-		super().__init__()
 		self.source = source
+		self.track = self.set_track()
+		self.track.on('ended', self.reload)
+
+	def set_track(self):
+		if self.kind == 'audio':
+			self.track = self.source.audio
+		else:
+			self.track = self.source.video
+
+	def self.reload(self):
+		print(f'reload the source----{self.source._file_path}')
+		self.set_source(MyMediaPlayer(self.source._file_path))
 
 	def set_source(self, source):
 		self.source = source
+		self.set_track()
 
 	async def recv(self):
 		if self.source is None:
@@ -23,20 +35,13 @@ class MyAudioStreamTrack(AudioStreamTrack):
 			f = await self.source.audio.recv()
 		return f
 
-class MyVideoStreamTrack(VideoStreamTrack):
+
+class MyAudioStreamTrack(AudioStreamTrack, MyTrackBasea):
 	def __init__(self, source=None):
-		super().__init__()
-		self.source = source
+		AudioStreamTrack.__init__(self)
+		MyTrackBase.__init__(self, source=source)
 
-	def set_source(self, source):
-		self.source = source
-
-	async def recv(self):
-		if self.source is None:
-			return None
-		f = await self.source.video.recv()
-		while f is None:
-			print('MyVideoTrack::recv(): will reload source')
-			self.set_source(MyMediaPlayer(self.source._file_path))
-			f = await self.source.video.recv()
-		return f
+class MyVideoStreamTrack(VideoStreamTrack, MyTrackBasea):
+	def __init__(self, source=None):
+		VideoStreamTrack.__init__(self)
+		MyTrackBase.__init__(self, source=source)