Re: [MMUSIC] M-lines: Wikifying it

Christer Holmberg <christer.holmberg@ericsson.com> Mon, 03 December 2012 16:45 UTC

Return-Path: <christer.holmberg@ericsson.com>
X-Original-To: mmusic@ietfa.amsl.com
Delivered-To: mmusic@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 5DD5321F85C8 for <mmusic@ietfa.amsl.com>; Mon, 3 Dec 2012 08:45:00 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -5.866
X-Spam-Level:
X-Spam-Status: No, score=-5.866 tagged_above=-999 required=5 tests=[AWL=-0.217, BAYES_00=-2.599, HELO_EQ_SE=0.35, J_CHICKENPOX_14=0.6, RCVD_IN_DNSWL_MED=-4]
Received: from mail.ietf.org ([64.170.98.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id ORUl3HtG3j2M for <mmusic@ietfa.amsl.com>; Mon, 3 Dec 2012 08:44:59 -0800 (PST)
Received: from mailgw7.ericsson.se (mailgw7.ericsson.se [193.180.251.48]) by ietfa.amsl.com (Postfix) with ESMTP id 047EC21F85A8 for <mmusic@ietf.org>; Mon, 3 Dec 2012 08:44:53 -0800 (PST)
X-AuditID: c1b4fb30-b7f936d0000018b3-b5-50bcd704cbd5
Received: from esessmw0237.eemea.ericsson.se (Unknown_Domain [153.88.253.124]) by mailgw7.ericsson.se (Symantec Mail Security) with SMTP id 63.77.06323.407DCB05; Mon, 3 Dec 2012 17:44:52 +0100 (CET)
Received: from ESESSHC022.ericsson.se (153.88.183.84) by esessmw0237.eemea.ericsson.se (153.88.115.90) with Microsoft SMTP Server (TLS) id 8.3.279.1; Mon, 3 Dec 2012 17:44:52 +0100
Received: from ESESSMB209.ericsson.se ([169.254.9.119]) by ESESSHC022.ericsson.se ([153.88.183.84]) with mapi id 14.02.0318.001; Mon, 3 Dec 2012 17:44:52 +0100
From: Christer Holmberg <christer.holmberg@ericsson.com>
To: 'Harald Alvestrand' <harald@alvestrand.no>
Thread-Topic: [MMUSIC] M-lines: Wikifying it
Thread-Index: AQHNzXfLf68XUJVyMEaaKo/W5rPZGpgG5AmA///5IgCAABQFMP//8eMAgAAREeCAADuMgIAAFtQu///3AAAAAjRjIA==
Date: Mon, 03 Dec 2012 16:44:51 +0000
Message-ID: <7594FB04B1934943A5C02806D1A2204B04D715@ESESSMB209.ericsson.se>
References: <50B624CC.4010501@alvestrand.no> <7594FB04B1934943A5C02806D1A2204B04D1FE@ESESSMB209.ericsson.se> <50BC84AC.4040201@alvestrand.no> <7594FB04B1934943A5C02806D1A2204B04D2C6@ESESSMB209.ericsson.se> <50BC89A0.1030104@alvestrand.no> <7594FB04B1934943A5C02806D1A2204B04D2F9@ESESSMB209.ericsson.se>, <50BCC9E5.60903@alvestrand.no> <7594FB04B1934943A5C02806D1A2204B04D602@ESESSMB209.ericsson.se> <50BCD57E.4040505@alvestrand.no>
In-Reply-To: <50BCD57E.4040505@alvestrand.no>
Accept-Language: en-US
Content-Language: en-US
X-MS-Has-Attach:
X-MS-TNEF-Correlator:
x-originating-ip: [153.88.183.17]
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: quoted-printable
MIME-Version: 1.0
X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFnrCLMWRmVeSWpSXmKPExsUyM+JvjS7L9T0BBovnmVgc6+tis5i6/DGL A5PHlQlXWD2WLPnJFMAUxWWTkpqTWZZapG+XwJUx7f0qxoLvPBWPnn1nbGDs4+pi5OSQEDCR eLbyKzuELSZx4d56ti5GLg4hgZOMEodPfmOFcHYwSnS9u88C4SxmlFi/ewNQCwcHm4CFRPc/ bZBuEQE9iQ/NixhBbGYBGYkZZxuZQGxhAW2JB2v/sUDU6EicX9HDDGFnSZz62QBmswioSDx6 eYgJZCSvgLfE0u9xEKv2MEtsPXgKbA6ngK7EtgX3wOYzAl36/dQaJohd4hK3nsxngvhAQGLJ nvPMELaoxMvH/1hBZkoIKEos75eDKNeRWLD7ExuErS2xbOFrsHJeAUGJkzOfgJ0pBBRvWTyB fQKjxCwkG2YhaZ+FpH0WkvYFjCyrGNlzEzNz0svNNzECY+rglt8GOxg33Rc7xCjNwaIkzqun ut9fSCA9sSQ1OzW1ILUovqg0J7X4ECMTB6dUA+Myc5bV0leW972fuCEqeIE403qmFPfOFN1C dpV5/163bbpyvjLutGboZZVX8QzT2dYe2qOy4k/4B0GveVWC31bolrbfjZ7ixvp4QYvCwXdm G8L5+tReGyhbLbbvSZGyeGYtrH05dxKztt2klc+66xgXOC7iz7AQbpVc7jHl2Kvz0ans87wt viqxFGckGmoxFxUnAgBAJAR2dwIAAA==
Cc: mmusic <mmusic@ietf.org>
Subject: Re: [MMUSIC] M-lines: Wikifying it
X-BeenThere: mmusic@ietf.org
X-Mailman-Version: 2.1.12
Precedence: list
List-Id: Multiparty Multimedia Session Control Working Group <mmusic.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/mmusic>, <mailto:mmusic-request@ietf.org?subject=unsubscribe>
List-Archive: <http://www.ietf.org/mail-archive/web/mmusic>
List-Post: <mailto:mmusic@ietf.org>
List-Help: <mailto:mmusic-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/mmusic>, <mailto:mmusic-request@ietf.org?subject=subscribe>
X-List-Received-Date: Mon, 03 Dec 2012 16:45:00 -0000

Hi, 

>>>>>> So, the exercise is NOT about how to apply attributes to individual sources?
>>>>> Only in the sense that it is about figuring out which attributes need to be applied to individual sources.
>>>> Well, I believe that was my original question :)
>>>>
>>>> If you want to apply an attribute to an individual source, you must use the ssrc attribute.
>>> If you are in the camp that believes that there should be more than oneindependent source per M-line.
>>>
>>> That camp seemed to me to be in the minority in Atlanta; it was absolutely not the consensus opinion.
>> It's not about in which camp someone is, it's about the assumptions we make in the wiki study. If the assumption is one source per m- line, than I think it should be explicitly stated.
>> Trying again, since I'm obviously not making myself clear:
>
> The two alternative approaches are:
>
> - Everything that needs to be controlled separately is in its own M-line. Everything that needs to go on the same RTP session uses BUNDLE to get there. Transport parameters get figured out somehow.
>
> - Everything that goes on the same RTP session goes on the same M-line. 
> Due to backwards compatible SDP, we may choose to use BUNDLE to lump video and audio together - or we may choose MMT if that works for people. Anything that needs separate control uses a=ssrc.

Exactly!

So, which (if any) approach do you assume in the wiki? :)

Regards,

Christer



> In Atlanta, the room was clearly split between the two. I'm trying to get real data on how many things need to be redefined for each case.