Re: [AVT] How is SDP a=fmtp used for RFC 2198?
Colin Perkins <csp@csperkins.org> Fri, 09 April 2004 12:42 UTC
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Cc: paulej@packetizer.com, Gunnar Hellstrom <gunnar.hellstrom@omnitor.se>, Tim Melanchuk <timm@convedia.com>, magnus.westerlund@ericsson.com, avt@ietf.org
From: Colin Perkins <csp@csperkins.org>
Subject: Re: [AVT] How is SDP a=fmtp used for RFC 2198?
Date: Fri, 09 Apr 2004 10:02:32 +0100
To: "Mundra, Satish" <smundra@telogy.com>
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On 8 Apr 2004, at 22:32, Mundra, Satish wrote: > Does this mean that if one wants to provide redundancy for different > encoding methods on "m=" line, one can not do so using a single RED PT? Correct. The "a=fmtp:" lines tell the sender how to encode particular data. > See example below where redundancy is desired for both 97 and 98. > > m=audio 5678 RTP/AVP 0 97 98 99 100 > a=rtpmap:97 telephone-event/8000 > a=rtpmap:98 t140/8000 > a=rtpmap:99 red/8000 > a=rtpmap:100 red/8000 > a=fmtp:99 97/97/97/97/97 > a=fmtp:100 98/98/98 Sending this much redundancy is excessive, but the example is syntactically correct. -- Colin Perkins http://csperkins.org/ _______________________________________________ Audio/Video Transport Working Group avt@ietf.org https://www1.ietf.org/mailman/listinfo/avt
- RE: [AVT] How is SDP a=fmtp used for RFC 2198? Mundra, Satish
- RE: [AVT] How is SDP a=fmtp used for RFC 2198? - … Gunnar Hellstrom
- Re: [AVT] How is SDP a=fmtp used for RFC 2198? Colin Perkins
- RE: [AVT] How is SDP a=fmtp used for RFC 2198? Mundra, Satish
- RE: [AVT] How is SDP a=fmtp used for RFC 2198? - Gunnar Hellstrom
- Re: [AVT] How is SDP a=fmtp used for RFC 2198? Colin Perkins