[Live-devel] Sending periodic metadata XML fragments-- should I use SimpleRTPSource or modify MediaSession?

[Dave McMordie]

Hi Ross / Live Developers,



Great library-- it was a pleasure to integrate!  We are transmitting a
sequence of uncorrelated image frames using a subclass of JPEGVideoSource.

We would also like to transmit a stream of XML fragments (one-to-one with
the video frames) which contain information about each frame.



What I have understood so far from previous threads is that I can create a
custom payload format using subclasses of MultiFramedSource /
MultiFramedSync.  I would then modify the MediaSession::initiate method to
add explicit support for this payload format.  On the server side, I also
create a new MediaSubsession containing the source/sink and add it to my
MediaSession.



It seems like modifying the liveMedia source to add our application-specific
format would be a little inelegant.  Is this really the best option, or do
you have existing payload formats which could be subclassed to provide a
container for a generic data stream?



For example, would it be possible to use subclasses of SimpleRTPSource/Sink
to send the raw stream?



If the former option is preferable, is there a way to do this without
modifying liveMedia, or should I just jump right in?



Thanks again for your hard work and for making this code available.



Best,



Dave McMordie
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