Hi All,

Is it allowed to add 
a=ptime:xx
for every codec listed in a single m= line?
For example:

m=audio 5004 RTP/AVP 0 4 18
a=rtpmap:0 PCMU/8000
a=ptime:10
a=rtpmap:4 G723/8000
a=ptime:30
a=rtpmap:18 G729/8000
a=ptime:20

All the samples I've seen so far imply there is only one ptime per m= line,
but this does not describe the "real world" where one would want to use
different audio codecs with different packet times and different codecs
operate on different [ms] frames.
G.711   - 1ms
G.729   - 10ms
G.723   - 30ms
i.e - specifiying  10ms does not make any sense for G.723, but does for
G.729 and G.711. 

Regards,

Danail Kirov


_______________________________________________
Sip-implementors mailing list
[EMAIL PROTECTED]
http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors

Reply via email to