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

Roman Shpount <roman@telurix.com> Mon, 07 December 2015 19:03 UTC

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Date: Mon, 07 Dec 2015 14:03:19 -0500
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From: Roman Shpount <roman@telurix.com>
To: Christer Holmberg <christer.holmberg@ericsson.com>
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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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Christer,

The rtcp-mux attribute will still be provided in cases when RTP/RTCP is
muxed. It will not be present in cases when RTCP is not used to begin with.

Essentially what I want to see are two options:

1. If, in the offer SDP, there is a valid IP in SDP c=line, then rtcp-mux
only is signaled by presence of rtcp-mux attribute and rtcp attribute set
to port from the m= line and optionally address from c=line. If ICE
candidates are present, they only present for RTP component.

2. If there is an IP4 0.0.0.0 address in the c=line (ICE only use case),
then rtcp-mux only is signaled by presence of rtcp-mux attribute and ICE
candidates for RTP component only.

Option 1 is for legacy interop. Option 2 is for new ICE only end points. I
do not want rtcp attribute to contain something artificial for the use case
where it is not needed to begin with.

Regards,

_____________
Roman Shpount

On Mon, Dec 7, 2015 at 9:38 AM, Christer Holmberg <
christer.holmberg@ericsson.com> wrote:

> Hi Roman,
>
>
>
> A question on your suggestion to use ICE candidates in order to indicate
> mux-exclusive by only providing RTP candidates: how do you separate the
> RTP/RTCP-mux cases from cases where RTCP is not used to begin with? In both
> cases you would only include RTP candidiates.
>
>
>
> Regards,
>
>
>
> Christer
>

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