The "X-" is a bad idea. We were using this in another scenario and many SDP parsers complained about "x-" headers. Better use something without "x-" (e.g. "xptime").
Christian > -----Urspr�ngliche Nachricht----- > Von: [EMAIL PROTECTED] [mailto:sip-implementors- > [EMAIL PROTECTED] Im Auftrag von link.xie > Gesendet: Mittwoch, 12. M�rz 2003 03:46 > An: Attila Sipos; [EMAIL PROTECTED] > Betreff: Re: [Sip-implementors] SDP packet times for muliple codecs > > Hi,Attila > I think your suggestion is wrong. We also use this solution before. > But we find that the meaning of 2 "m=" line repesent 2 media stream. So > it's not suitalbe for this case. > Our solution is introducing a new attribut "X-mptime" which means > multiple ptime > and the SDP would like: > > m=audio 10000 RTP/AVP 0 8 ----- 0 means g711u-law and 8 means > g711a-law > a=X-ptime: 20 30 -----20 for g711u 30 for > g711a > > I think this can solve your problem > > Best Regard > Link.Xie > ----- Original Message ----- > From: "Attila Sipos" <[EMAIL PROTECTED]> > To: <[EMAIL PROTECTED]> > Sent: Tuesday, March 11, 2003 7:33 PM > Subject: [Sip-implementors] SDP packet times for muliple codecs > > > > > > Hello everyone, > > > > For multiple codecs we can have an SDP like this: > > m=audio 10000 RTP/AVP 0 8 ----- 0 means g711u-law and 8 means > g711a-law > > a=ptime:20 > > But this is only correct if the packet times match for > > u-law and a-law. > > > > > > What if you have a system where, for some reason, the > > codecs have different packet times? > > > > Can you do this? > > m=audio 10000 RTP/AVP 0 - ---- g711-ulaw > > a=ptime:20 > > m=audio 10000 RTP/AVP 8 ---- g711 a-law > > a=ptime:30 > > > > Regards, > > > > Attila > > > > <http://www.vegastream.com> > > VegaStream : A World of difference for your Integrated Communications > > _______________________________________________ > > Sip-implementors mailing list > > [EMAIL PROTECTED] > > http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors > > _______________________________________________ > Sip-implementors mailing list > [EMAIL PROTECTED] > http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors _______________________________________________ Sip-implementors mailing list [EMAIL PROTECTED] http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
