> What is the best way to determine that a proxy server is streaming from
> an RTSP source?
The best way is to run, on the computer on which you would run the proxy server
openRTSP -n rtsp://<back-end-stream>
(The "-n" option tells "openRTSP" to display a report (with a beep) when the
first RTP packet arrives.)
If "openRTSP" successfully receives data from the back-end server, then the
"LIVE555 Proxy Server" - when run on the same stream - will also receive data
(because both "openRTSP" and the "LIVE555 ProxyServer" use the same RTSP client
code). (Unless, of course, the back-end server is a buggy 'Vivotek' camera,
but you now know to stop using those :-)
If, however, "openRTSP" fails to receive data from the back-end server, then
the problem may be that the back-end server is behind a firewall that is
blocking RTP/UDP packets. So instead, try requesting RTP/RTCP-over-TCP
streaming, by adding the "-t" option to "openRTSP" - i.e.
openRTSP -t -n rtsp://<back-end-stream>
If that works, then adding the "-t" option to the "live555ProxyServer" command
line will also work.
Ross Finlayson
Live Networks, Inc.
http://www.live555.com/
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