Hi Ross, We use the LIVE555 Streaming Media library to implement a live streaming server (on Ubuntu) and a windows media player RTSP client streaming RTP over TCP only. We have run into a complicated set of problems recently:
1) When a client with a *bad* internet connection joins the RTSP server, the server becomes unresponsive (to new RTSP connections) and connected clients are dropped. Enabling the DEBUG processor directive showed that many writes fail in RTPInterface::sendRTPOverTCP before the server finally hangs. After searching the mailing list for any similar problems, I came across this post: http://lists.live555.com/pipermail/live-devel/2010-June/012226.html which seems to indicate that using the new asynchronous RTSP client resolves that issue? Could you please clarify this a bit? If I understand correctly, we must therefore upgrade both our server and client code to use the latest live media version to avoid the server hanging? Or would updating the client code to use the new async RTSPClient code suffice? 2) We are aware that you only support the latest version so we recently upgraded the live555 version. We then ran into another issue: while the stream is playing back, CPU usage is negligible. Then, once network problems occur, the CPU usage spikes to 100%. Matt's post (http://lists.live555.com/pipermail/live-devel/2011-June/013521.html) could be related. However commenting out the adding of dummy socket to fWriteSet and fExceptionSet as you advised in your response to Matt didn't solve the problem. Upgrading our WMP client to use the new asynchronous interface didn't help either. Finally, we were able to replicate the problem using only openRTSP. Here's a short summary of the steps taken so far: LiveMedia 2010.04.09 - synchronous - WMP RTSPClient - no problems with CPU usage LiveMedia 2011.03.14 - synchronous - WMP RTSPClient - same CPU usage problem LiveMedia 2011.03.14 - asynchronous - WMP RTSPClient - same CPU usage problem LiveMedia 2011.03.14 - asynchronous - openRTSP - same CPU usage problem LiveMedia 2011.07.15 - asynchronous - openRTSP - same CPU usage problem Ways to replicate the problem: - One method that has worked to trigger the problem is to start running openRTSP and then restarting our ADSL router once the stream is active. Could this have anything to do with "the Windows bug that forced me to add "dummySocket" in the first place"? We are currently piloting the project and these errors are critical for the success of the pilot. Any pointers/advice would be greatly appreciated. Best regards, Ralf _______________________________________________ live-devel mailing list live-devel@lists.live555.com http://lists.live555.com/mailman/listinfo/live-devel
