[Live-devel] Multicast addresses for MPEG4 and H.264 streams

[Ross Finlayson]

> The FAQ mentions that the testMPEG4VideoStreamer program incorporates an 
> RTSP server to provide the SDP description - is this why the RTP 
> multicast stream is accessed using the RTSP unicast address ?

Yes.


> VLC instructions (http://www.videolan.org/doc/play-howto/en/ch04.html) 
> suggest an RTP multicast stream can be received using 
> rtp://@<multicast_addr>:1234/, however VLC does not display a video 
> stream when this address is used - is this because it cannot decode the 
> stream as it doesn't have the information required ?

This is not a VLC mailing list.  But the answer is probably Yes.  VLC cannot understand the video stream without also knowing the 'configuration' information in the stream.  This is included in the SDP description.


> Each stream's ServerMediaSession reference count (from 
> sms->referenceCount(), where sms was created with ServerMediaSession 
> *sms = ServerMediaSession::createNew(...) ) increments with each new 
> multicast connection. Is this a count of the number of clients

Yes.


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

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