hi,
as long as you are inside the Flash World you have to use what you get there.
At the moment its only Sorenson Spark h.263 for Live Streaming and for audio you have Nellymoser (you can switch to Speex if you compile to SWF9, but OpenMeetings is only SWF8 compatible). Anyway Speex does not give more features.
Using SIP is only available if you do for example an overlay with a Java Applet that runs the Audio-part. Such a Java-Applet can then run as SIP-Client, or whatever Codec/Communication Protocol you need. I do currently a proof-of-concept for such a solution.
sebastian
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Sebastian Wagner
http://www.webbase-design.dehttp://openmeetings.googlecode.com
http://www.laszlo-forum.deseba....@gmail.com