[Live-devel] playSIP crashed after getting 200 OK for invite

[Ross Finlayson]

> 1. What is different between OnDemandServerMediaSubsession and ServerMediaSubsession classes?

“ServerMediaSubsession” is an abstract base class.  It is used by a RTSP server to describe each piece of media that it streams.  “OnDemandServerMediaSubsession” is a (concrete) subclass of “ServerMediaSubsession”.  It is used to stream a particular piece of media to one or more RTSP clients, each via unicast RTP.


> 2. What is different between RTPSink and SimpleRTPSink classes?

“RTPSink” is an abstract base class, used to represent a destination (unicast or multicast) for RTP streaming.  “SimpleRTPSink” is a (concrete) subclass of “RTPSink”.  It is used to implement many simple RTP payload formats (that do not include any media-specific headers or fragmentation).


> 3. Can I play/stream a wav file with g729 codec, which testProgram does this ? (so far I am successful with g711 (alaw/uLaw) and AMR )

*In principle* you could use the “LIVE555 Media Server” (for streaming via unicast), or “testWAVAudioStreamer” (for streaming via multicast).  *However*, our code currently doesn’t support streaming from a G.729 WAV file - in part because I’ve never seen such a file.  So, if you could point me at such a file (put it on a publicly-accessible web server, and send me the URL), I’ll download it and see if our code can be updated to stream files like this.


> 4. Could you please address me to the class where I can record incoming RTP stream in to a wav file format?

We currently do not support recording into a WAV file.  However, if you run the “openRTSP” RTSP client application - http://www.live555.com/openRTSP/ - you will get a ‘raw’ audio file.  If you were to ‘prepend’ an appropriate WAV audio header to this file, you should get a WAV file that you can play.


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