IETF Logo Mail Archive

Re: [MMUSIC] BUNDLE: no reason por payload type to be unique within bundled m= lines

Paul Kyzivat <pkyzivat@alum.mit.edu> Thu, 17 March 2016 15:59 UTC

Return-Path: <pkyzivat@alum.mit.edu>
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 07FAD12D577 for <mmusic@ietfa.amsl.com>; Thu, 17 Mar 2016 08:59:57 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -1.935
X-Spam-Level:
X-Spam-Status: No, score=-1.935 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, RCVD_IN_DNSWL_LOW=-0.7, SPF_SOFTFAIL=0.665] autolearn=no autolearn_force=no
Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=comcast.net
Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id exdKxgNhA6fM for <mmusic@ietfa.amsl.com>; Thu, 17 Mar 2016 08:59:55 -0700 (PDT)
Received: from resqmta-po-11v.sys.comcast.net (resqmta-po-11v.sys.comcast.net [IPv6:2001:558:fe16:19:96:114:154:170]) (using TLSv1.2 with cipher DHE-RSA-AES128-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id C25DD12D510 for <mmusic@ietf.org>; Thu, 17 Mar 2016 08:59:55 -0700 (PDT)
Received: from resomta-po-08v.sys.comcast.net ([96.114.154.232]) by resqmta-po-11v.sys.comcast.net with comcast id X3ze1s002516pyw013zvCm; Thu, 17 Mar 2016 15:59:55 +0000
Received: from Paul-Kyzivats-MacBook-Pro.local ([73.218.51.154]) by resomta-po-08v.sys.comcast.net with comcast id X3zu1s0033KdFy1013zuDH; Thu, 17 Mar 2016 15:59:55 +0000
To: Iñaki Baz Castillo <ibc@aliax.net>
References: <CALiegfm7Rb4e5DFGycr=EsdigE1XFCUiqNL6+GpRSyrGe=_RWg@mail.gmail.com> <56DED735.1000101@ericsson.com> <CALiegf=G77JOcoR6DORnPsMx4OCgy=_dYQ_r8KfjMy_33vn89A@mail.gmail.com> <7594FB04B1934943A5C02806D1A2204B37E9EA74@ESESSMB209.ericsson.se> <CALiegf=F4z9r+oCO1DMW_nXq7TBJjf-n3N1r6yr5tLoksXtUqg@mail.gmail.com> <7594FB04B1934943A5C02806D1A2204B37E9FDAB@ESESSMB209.ericsson.se> <CALiegf=kzThQ3n+Z-=E8G=ivyL1W=Q4gUcQenihAJ3pmv8udKQ@mail.gmail.com> <7594FB04B1934943A5C02806D1A2204B37EA257B@ESESSMB209.ericsson.se> <CALiegfnLMUZnA=AQEnvFhxKKbwUeg=sFHRiC9R2MxisY-43UFg@mail.gmail.com> <D31037D8.5B90%christer.holmberg@ericsson.com> <CALiegfmWPrai9a1hkj5rpLeyowspAcpr3jNZpNyc4HatXGfo9Q@mail.gmail.com> <56EACF4E.7010106@alum.mit.edu> <CALiegf=TCd9WBza1jXM5t3NUNiPJOD4utmKqMNrX2bTDpAq+yA@mail.gmail.com>
From: Paul Kyzivat <pkyzivat@alum.mit.edu>
Message-ID: <56EAD479.4070709@alum.mit.edu>
Date: Thu, 17 Mar 2016 11:59:53 -0400
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.10; rv:38.0) Gecko/20100101 Thunderbird/38.7.0
MIME-Version: 1.0
In-Reply-To: <CALiegf=TCd9WBza1jXM5t3NUNiPJOD4utmKqMNrX2bTDpAq+yA@mail.gmail.com>
Content-Type: text/plain; charset="utf-8"; format="flowed"
Content-Transfer-Encoding: 8bit
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=comcast.net; s=q20140121; t=1458230395; bh=4/rx0CVqaw2g2fwfjy7o+ICx/aUfysrLY3k6C6s4OrI=; h=Received:Received:Subject:To:From:Message-ID:Date:MIME-Version: Content-Type; b=hazGiH9gPe9CYc1NUX9JwuCgm3xbDaVwfDe5W3/nTVyoq/JRuF5LMderEHOpDOP1C UjAvK8152CZFKah28E3V3n5upgOlmVTFzSW0eLjpsIts9oiXkP4S3TGShSKsD/UFRE hk9UKm2i+s76fSW4Kg7CGNw2GpsVGTJHGBQRbZ1T3RgTcOuXkRqsN2YZJ4QcETPHtE bymAuk7TUj85f3ko8b5ES9AgHw/mSJf626TmG3W+ccakPB6o0UBTjeNblayskgcMn+ KpQzcS/CAODoTSy3Wp6zfd5Wr7W+0fx91eslrea9pRvT+kU18vyDXZhfuqz7jWTpG4 UsyTtHY1I6DFA==
Archived-At: <http://mailarchive.ietf.org/arch/msg/mmusic/Wq9Uyxa5U_QrlL8xUN0t3qG08Vs>
Cc: "mmusic@ietf.org" <mmusic@ietf.org>
Subject: Re: [MMUSIC] BUNDLE: no reason por payload type to be unique within bundled m= lines
X-BeenThere: mmusic@ietf.org
X-Mailman-Version: 2.1.17
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: <https://mailarchive.ietf.org/arch/browse/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: Thu, 17 Mar 2016 15:59:57 -0000

On 3/17/16 11:53 AM, Iñaki Baz Castillo wrote:
> 2016-03-17 16:37 GMT+01:00 Paul Kyzivat <pkyzivat@alum.mit.edu>:
>>
>>> I just hope that BUNDLE is a required step in order to separate each
>>> RTP "sender" and RTP "receiver" within a RTP session, so in the future
>>> we can get rid of SDP and design a proper RTP parameters based API for
>>> WebRTC.
>>
>> It sounds like you are asking to restart the work on SDPng. I doubt that is
>> going to happen. The problems it encountered haven't gone away.
>>
>> Maybe it would be possible with WebRTC.
>
> I think that SDP is a burden for WebRTC that makes it difficult for
> developers to express what they really want to express (which
> basically is "I want to send this audio and this video, now tell me
> what you wish to send me"). Instead on focusing on media streams being
> sent and received over one or more "transports" we must deal with
> "symmetric" negotiations designed for 1-1 audio communications.

ISTM that is what they had in mind with 3264 and SDP.

This breaks down the first time that you want to set up a conference. At 
that point it ceases to be 1:1.

	Thanks,
	Paul

v2.23.0 | Report a Bug | By Email