[Live-devel] Proper subnet for multicast streaming

Ross Finlayson finlayson at live555.com
Sat Aug 9 08:24:06 PDT 2008


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>Hello,
>          Until now, I've always been doing my streaming from my 
>embedded liveMedia boxes to my PC, and they all been tied into my 
>company switch on the 192.168.202.xx subnet (255.255.255.0 mask)
>VLC has always picked up the stream properly, and have had no problems.
>
>When I moved my boxes to a local switch on my desk that I plug into 
>my PC using a separate NIC, I've been having problems since. The 
>boxes are all assigned (including the PC NIC) on 10.0.10.xx subnet, 
>with 255.255.255.0 as the mask. I have an encoder box, and a decoder 
>box both of which run liveMedia (server and client), and the 
>receiver can receive the stream from the encoder without problems.
>
>However VLC player on my PC seems not to be able to play the stream 
>anymore - it connects to the stream and I can see some initial 
>information about the stream (h.264 stream, it can get the SDP info 
>and all that fine, most probably since its TCP) but it can't seem to 
>play the stream; I used ethereal, and I can see the UDP packets 
>floating by
>
>Any help would be appreciated,

Does *any* multicast traffic reach your destination network from your 
source network?  Perhaps you just have a multicast routing problem 
between them?

If so, then maybe you should switch to using unicast streaming rather 
than multicast (e.g., use "testOnDemandRTSPServer" as a model).
-- 

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