HI list, Hi Robert,
What about the case when UAS responds with just one codec? Would OPAL make
the UAC send a reINVITE with that again??
Something like this,
UAC -------------------INVITE/ 261,263,264 ----------> UAS
UAC <-------------------200/OK/ 264------------------------ UAS
UAC ------------------- reINVITE/264----------------------UAS
???????????
UAC <--------------------200/OK/264------------------------UAS
???????????
Regards,
Vineet Menon
On 7 March 2012 01:28, Worley, Dale R (Dale) <[email protected]> wrote:
> > From: Paul Kyzivat [[email protected]]
> >
> > Another is when multiple RTP streams are multiplexed on the same RTP
> > session - distinguished by SSRC. (I may have the terminology wrong
> > there.) This hasn't been considered much in sip until recently, but is
> > now increasingly going to be used.
>
> I don't know if it is done much, but that would be natural in
> conferencing situations, with the conference focus simply copying the
> chosen incoming stream to all the outgoing streams. As the chosen
> speaker changes, the outgoing streams could switch between codecs.
>
> > From: Robert Jongbloed [[email protected]]
> >
> > I know there are some implementations that do exactly this for audio. The
> > OPAL implementation unfortunately is not designed to wait till the first
> RTP
> > packet arrives before creating codecs, starting video grabbers, blah,
> blah,
> > blah. It does it when the 200 OK arrives. So, OPAL gets around the
> ambiguity
> > by immediately sending a re-INVITE selecting one of the codecs the remote
> > answered with.
>
> Yeah, but the "remote" can refuse the re-INVITE, forcing OPAL to
> continue to accept all the codecs that it offered in the first place.
>
> Dale
>
> _______________________________________________
> Sip-implementors mailing list
> [email protected]
> https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
>
_______________________________________________
Sip-implementors mailing list
[email protected]
https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
