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
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