[Live-devel] Live555 Streaming from a live source

[Ross Finlayson]

>how is the presentationtime of two streams synchronised?

Please read the FAQ!


>I have to synchronise the mpeg-4 es and a wave file. I am able to 
>send the two streams together by creating single servermediasession 
>and adding two separate servermediasubsession, but they are not 
>synchronised.
>In case of mpeg-4 es video, the gettimeofday() is getting called 
>when the constructor of MPEGVideoStreamFramer is called and in case 
>of wave, in WAVAudioFileSource::doGetNextFrame(). I think due to 
>this the video and audio is not getting synchronised. So in this 
>case how should i synchronise the audio and video?

You *must* set accurate "fPresentationTime" values for each frame of 
each of your sources.  These values - and only these values - are 
what are used for synchronization.  If the "fPresentationTime" values 
are not accurate - and synchronized - at the server, then they cannot 
possibly become synchronized at a client.
-- 

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