How to restart a frozen NetStream AS3?

Question

I have the following code in my AS3 project:

nc.addEventListener(NetStatusEvent.NET_STATUS, netConnectionStatus);
netRemoteStream.addEventListener(NetStatusEvent.NET_STATUS, netRemoteStatus);
netRemoteStream.addEventListener(AsyncErrorEvent.ASYNC_ERROR, asyncErrorHandler);
private function netConnectionStatus(event:NetStatusEvent):void 
{
   trace("netStatus = " + event.info.code);
}
private function netRemoteStatus(e:NetStatusEvent):void
{
   trace("netRemoteStatus = " + e.info.code);
}
private function asyncErrorHandler(e:AsyncErrorEvent):void
{
   trace("asyncErrorHandler " + e.error);
}

I'm subscribed to a NetStream:

netRemoteStream = new NetStream(myNetConnection);
netRemoteStream.play("channelToView");
netRemoteStream.bufferTime = 0;
myViewer.attachNetStream(netRemoteStream);
netRemoteStream.receiveAudio(true);
netRemoteStream.receiveVideo(true);

But sometimes the video will be frozen and I only receive audio, but not video and the listeners don't show any error. What can i do to solve this? I have to call to "netRemoteStream.play("channelToView");" when the video is frozen, but I don't know when.

For more details, I've used Wireshark sniffer and I have could observed the following traces: Audio Data Video data Set Chunk Size 513 Audio Data

Any idea? Someone can help me? Thank you