Hello,
I have a question related to SDP. See comments inline.
____________________
Manoj Bhatia writes:
>
> Manish
>
> See comments inline.
>
> thanks
> -manoj
>
> "Manish S. Jalan" wrote:
>
> > Hello,
> >
> > I am back to seek some more clarifications.
> >
> > Is the following sdp description ok: (the order of attribute definitions
>especially)
> >
> > m=audio 1234 RTP/AVP 4 0
> > a=rtpmap:4 G723/8000
> > a=rtpmap:0 PCMU/8000
> > a=ptime:20
> > a=fmtp:4 bitrate=6300
> >
>
> This may not be illegal (given how loose the RFC is )
> but I would think that it is not the preferred way.
>
> >
> > or it should be,
> >
> > m=audio 1234 RTP/AVP 4 0
> > a=rtpmap:4 G723/8000
> > a=fmtp:4 bitrate=6300
> > a=rtpmap:0 PCMU/8000
> > a=ptime:20
> >
>
> This is the right definition.
> The ptime parameter would correspond to G.711ulaw (payload 0) .
I could't find any statement about the order of the media attributes
inside a media announcement in the RFC. In this context, how about
this definition:
m=audio 1234 RTP/AVP 4
a=rtpmap:4 G723/8000
a=fmtp:4 bitrate=6300
m=audio 1234 RTP/AVP 0
a=rtpmap:0 PCMU/8000
a=ptime:20
=> no information about the G723's packetization and 20ms
packetization for PCMU.
>
> >
> > Is the ptime definition ok?
> > the ptime is media specific or format specific?
> >
> > Please help me in clarifying the concepts.
> > Any help is highly appreciated.
> >
> > Regards,
> > -Manish S. Jalan
> >
Regards,
Ovidiu Sas
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