There is no inherent limit in our code as to how many ‘back-end’ servers
(and/or ‘front-end’ clients) the “LIVE555 Proxy Server” can support.
Scalability problems like you describe can sometimes be caused by running into
an (operating system-imposed) limit on the number of sockets that your
application can have in use at any time. See
http://live555.com/liveMedia/faq.html#scalability
Another thing to note is that for each proxied stream, the total network
bandwidth used by the proxy server is N+1 times the bandwidth of the proxied
stream, where N is the number of ‘front-end’ clients. Multiply this by the
number of proxied streams, and you end up with a significant network bandwidth
- which can easily approach the capacity of your network (which can often be
significantly lower than the nominal bandwidth of your computer’s network
interface - especially if the 'back end' stream and/or 'front-end' client is
using RTP/RTCP-over-TCP. (RTP/RTCP-over-TCP streaming should be avoided,
whenever possible.)
People often misjudge how much bandwidth video streams actually use, and
discover that as they start proxying more and more streams (and/or add more and
more 'front-end' clients), the capacity of their network quickly becomes a
limiting factor. (Once again, this is not a limit in our code.)
Ross Finlayson
Live Networks, Inc.
http://www.live555.com/
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