[Live-devel] Port 5004 used for all instances of live555proxyserver while using rtp over udp

[HAN Hao]

> For unicast streams like this, it is the RTSP client that chooses the destination port number for RTP packets.  In particular, the "LIVE555 Proxy Server" - which acts as a RTSP client for each 'back-end' RTSP server (e.g., IP camera) - chooses the destination RTP port number for each stream, and it will always choose a different port number for each stream.  You should be able to see this by looking at the RTSP protocol exchange for each 'back-end' stream, which you can see by running "live555ProxyServer" with the -V flag (note the "client_port=" in each RTSP SETUP request from the proxy server).



> It appears that your intermediate "UP-Squared" boxes are likely responsible for your problem; it seems that they are remapping the port number of incoming RTP packets (from the back-end IP camera) to 5004.  You will need to disable this functionality in your "UP-Squared" boxes.   (Or, alternatively, remove your "UP-Squared" boxes entirely, and change your server so that it acts a a gateway, and is aware of both IP subnets.)



> In short, this is a problem with your networking setup, not a problem with the LIVE555 software.

Hi Ross,

Thanks for the prompt and detailed reply!

I have checked through the data packets via Wireshark and it looks to me that the RTSP exchange between the server and the UP2 indicates that the live555proxyserver sent out a RTSP SETUP Request with client_port=5004-5005 on each instance. I have tried using datastead to stream directly from the camera via the UP2 and for the multiple instances I have attempted, the client_port has always been different between the server and the UP2 for both UDP and TCP. Any chance that this could be a live555 problem when it comes to RTP over UDP?

Thanks!

Regards,
Han Hao



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