Re: [MMUSIC] Another bundling proposal
worley@ariadne.com (Dale R. Worley) Mon, 25 February 2013 22:46 UTC
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Date: Mon, 25 Feb 2013 17:45:29 -0500
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From: worley@ariadne.com
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To: Paul Kyzivat <pkyzivat@alum.mit.edu>
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Cc: mmusic@ietf.org
Subject: Re: [MMUSIC] Another bundling proposal
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> From: Paul Kyzivat <pkyzivat@alum.mit.edu> > One observation is that this introduces a new level of multiplexing > based on a special codec. While it can work, there is already a proposal > on the table for multiplexing multiple RTP sessions on a single 5-tuple: > draft-westerlund-avtcore-transport-multiplexing-04. ISTM that this new > bundling proposal could be adapted to use that multiplexing technique. I haven't had the time to compare the SHIM encapsulation with the KUMQUAT encapsulation, other than to see that SHIM encapsulation doesn't produce valid-looking RTP, whereas KUMQUAT does. Also, KUMQUAT maintains word(4-octet)-alignment in the RTP payload. But as the demultiplexing analysis shows, you don't *have* to encapsulate to allow demultiplexing to work, as long as the payload types of the constituent MDs are distinct, as well as the SCTP port numbers in the SCTP constituent MDs. > Bernard already raised issues about port 9 and address 0.0.0.0. I'll add > that when this is done for multiple m-lines we stand some chance of > getting errors due to reusing the same transport address. AFAIK there is > no particular reason to use port 9 in this case, so perhaps it would be > safer to use a different non-zero port in each such line. Using null addresses in offers could be a problem. But there's a fix for that. Dale
- Re: [MMUSIC] Another bundling proposal (and why y… Bernard Aboba
- [MMUSIC] Another bundling proposal Dale R. Worley
- Re: [MMUSIC] Another bundling proposal Charles Eckel (eckelcu)
- Re: [MMUSIC] Another bundling proposal Bernard Aboba
- Re: [MMUSIC] Another bundling proposal Paul Kyzivat
- Re: [MMUSIC] Another bundling proposal Dale R. Worley
- Re: [MMUSIC] Another bundling proposal (and why y… Dale R. Worley