RTP endsystems got to validate RTP header correctness and to check whether the agreed media format is inline with the RTP PT codepoint! Forget any implementation which isn't providing such a fundamental capability.
> -----Original Message----- > From: sip-implementors-boun...@lists.cs.columbia.edu > [mailto:sip-implementors-boun...@lists.cs.columbia.edu] On > Behalf Of Iñaki Baz Castillo > Sent: Mittwoch, 25. Februar 2009 14:21 > Cc: sip-implementors > Subject: Re: [Sip-implementors] asymmetric audio codecs > > 2009/2/25 Klaus Darilion <klaus.mailingli...@pernau.at>: > > >> But if Bob sends G711, how will detect Alice that the > incoming RTP is > >> not G729? > > > > There is the payloadtype field in the RTP header. So it is easy to > > differ them. > > Yes, this is the point. Are you sure that devices check that > payload type? or do they assume they will receive the codec > negociated in the SDP? > Is legall to indicate codec_A in my SDP and send codec_B? > > -- > Iñaki Baz Castillo > <i...@aliax.net> > > _______________________________________________ > Sip-implementors mailing list > Sip-implementors@lists.cs.columbia.edu > https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors > _______________________________________________ Sip-implementors mailing list Sip-implementors@lists.cs.columbia.edu https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
