[Live-devel] h264 live video multicast streaming

[Ross Finlayson]

>   I used testH264VideoStreamer.cpp as a model to stream h264 live video in the multicast way. In the local area network, I worked fine.But In the public network, the client couldn't receive the video data. Then I asked somebody and was told that the multicast data can't be transmitted through NAT. So, is there a way that can make the multicast data spread over the public network using live555 ?

No, you cannot stream via multicast beyond a single LAN, unless IP multicast routing has been set up between your server and client network(s) - which is rarely the case.

Instead, you should stream via unicast, using the “testOnDemandRTSPServer” demo application as a model; see
	http://live555.com/liveMedia/faq.html#liveInput-unicast <http://live555.com/liveMedia/faq.html#liveInput-unicast>

However, if you have a NAT (rather than just a router) between your server and client, then it’s unlikely that you will be able to use RTSP/RTP streaming between them, especially if your server is not on the public Internet.  (Probably your only hope - in this case - would be to use a “LIVE555 Proxy Server” outside your NAT.)


Ross Finlayson
Live Networks, Inc.
http://www.live555.com/

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