Hi, I don't believe it is correct. Attributes can be in any order, within a media description, so each ptime would basically overwrite the previous value - or the parser would return an error.
There has, from time to time, been talk about a codec specific ptime attribute. Something like: a=cptime: 98 20 ...or something like that. Regards, Christer > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] Behalf > Of Lyons, Terry > Sent: 9. syyskuuta 2005 20:57 > To: [email protected] > Cc: [email protected] > Subject: [MMUSIC] a=mptime not needed ? FW: [Sip-implementors] > Multipleptime attributes in the SDP > > > Is this a valid concept, "codec specific attribute"? > SDP says ptime "is a media attribute". > > - [EMAIL PROTECTED] > > > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] Behalf Of > [EMAIL PROTECTED] > Sent: Wednesday, September 07, 2005 1:33 AM > To: Kool Guy > Cc: [EMAIL PROTECTED]; > [email protected] > Subject: Re: [Sip-implementors] Multiple ptime attributes in the SDP > > Hi, > > ptime is a codec specific attribute. The ptime value > corresponds to the > previous codec specified in the > attribute list. The multiple ptime attribute can be > represented as follows: > > m=audio 49230 RTP/AVP 96 97 98 > a=rtpmap:96 L8/8000 > a=ptime:20 > a=rtpmap:97 L16/8000 > a=ptime:25 > a=rtpmap:98 L16/11025/2 > > In the above, ptime=20 corresponds to L8 codec and ptime=25 > corresponds to > L16. > > Regards > Partha > > ------------------------------------------------------------------ > R.Parthasarathi > Flextronics Software Systems (FSS)- B'lore- India > Off: +91-80-51069088 Mob: +91-9448383781 > ------------------------------------------------------------------ > > _______________________________________________ > mmusic mailing list > [email protected] > https://www1.ietf.org/mailman/listinfo/mmusic > _______________________________________________ Sip-implementors mailing list [email protected] http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
