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Re: [MMUSIC] FW: New Version Notification for draft-holmberg-mmusic-mux-exlusive-00.txt

Christer Holmberg <christer.holmberg@ericsson.com> Mon, 07 December 2015 19:47 UTC

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From: Christer Holmberg <christer.holmberg@ericsson.com>
To: Roman Shpount <roman@telurix.com>
Thread-Topic: [MMUSIC] FW: New Version Notification for draft-holmberg-mmusic-mux-exlusive-00.txt
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Date: Mon, 07 Dec 2015 19:46:24 +0000
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Cc: "mmusic@ietf.org" <mmusic@ietf.org>, Paul Kyzivat <pkyzivat@alum.mit.edu>
Subject: Re: [MMUSIC] FW: New Version Notification for draft-holmberg-mmusic-mux-exlusive-00.txt
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Hi,

>> That is all fine for SDP. But, again, ICEbis only talks about ICE candidiates. So, I have suggested text to ICEbis, saying that the presence of 
>> RTP candidates (component ID 1) can mean two things: RTP/RTCP-mux or RTP-only. Which is used needs to be clarified in signalling (SDP, or whatever other signalling mechanism).
>
> I would clarify this that presence of RTP candidates (component ID 1) can mean two things: RTP/RTCP-mux or a non-RTP transport that 
> is not using RTCP and can be transmitted over a single connection, such as SCTP or UDPTL. 
>
> There should never be a legitimate case why RTP would be used without RTCP.

Is that really true?

If so, then I think some existing RTP-text in ICEbis needs to be fixed, because the text says "If RTCP is also supported". To me that sounds like RTCP is optional with RTP.

Regards,

Christer

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