IETF Logo Mail Archive

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

Christer Holmberg <christer.holmberg@ericsson.com> Tue, 08 March 2016 19:05 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 8840912D9EC for <mmusic@ietfa.amsl.com>; Tue, 8 Mar 2016 11:05:15 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -4.221
X-Spam-Level:
X-Spam-Status: No, score=-4.221 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RCVD_IN_DNSWL_MED=-2.3, RCVD_IN_MSPIKE_H3=-0.01, RCVD_IN_MSPIKE_WL=-0.01, SPF_PASS=-0.001] autolearn=ham autolearn_force=no
Received: from mail.ietf.org ([127.0.0.1]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id J-7lcpQcczGQ for <mmusic@ietfa.amsl.com>; Tue, 8 Mar 2016 11:05:14 -0800 (PST)
Received: from sesbmg23.ericsson.net (sesbmg23.ericsson.net [193.180.251.37]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 8AA8912D9F2 for <mmusic@ietf.org>; Tue, 8 Mar 2016 11:05:13 -0800 (PST)
X-AuditID: c1b4fb25-f794e6d000003d15-1e-56df22672e95
Received: from ESESSHC007.ericsson.se (Unknown_Domain [153.88.183.39]) by sesbmg23.ericsson.net (Symantec Mail Security) with SMTP id 9E.3D.15637.7622FD65; Tue, 8 Mar 2016 20:05:11 +0100 (CET)
Received: from ESESSMB209.ericsson.se ([169.254.9.122]) by ESESSHC007.ericsson.se ([153.88.183.39]) with mapi id 14.03.0248.002; Tue, 8 Mar 2016 20:05:11 +0100
From: Christer Holmberg <christer.holmberg@ericsson.com>
To: Iñaki Baz Castillo <ibc@aliax.net>, Magnus Westerlund <magnus.westerlund@ericsson.com>
Thread-Topic: [MMUSIC] BUNDLE: no reason por payload type to be unique within bundled m= lines
Thread-Index: AQHReT3F3TWg6MCKek6vzPt07YGFZJ9Pff2AgAAw3wCAADkCsA==
Date: Tue, 08 Mar 2016 19:05:10 +0000
Message-ID: <7594FB04B1934943A5C02806D1A2204B37E9EA74@ESESSMB209.ericsson.se>
References: <CALiegfm7Rb4e5DFGycr=EsdigE1XFCUiqNL6+GpRSyrGe=_RWg@mail.gmail.com> <56DED735.1000101@ericsson.com> <CALiegf=G77JOcoR6DORnPsMx4OCgy=_dYQ_r8KfjMy_33vn89A@mail.gmail.com>
In-Reply-To: <CALiegf=G77JOcoR6DORnPsMx4OCgy=_dYQ_r8KfjMy_33vn89A@mail.gmail.com>
Accept-Language: en-US
Content-Language: en-US
X-MS-Has-Attach:
X-MS-TNEF-Correlator:
x-originating-ip: [153.88.183.148]
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: base64
MIME-Version: 1.0
X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFmpkkeLIzCtJLcpLzFFi42KZGbFdXTdd6X6YwaT9VhbT99lYTF3+mMWB yeNcw3t2jyVLfjIFMEVx2aSk5mSWpRbp2yVwZZzqfMVc8Iy94s2DmUwNjGfYuxg5OSQETCQm PbjBCmGLSVy4t56ti5GLQ0jgMKPEhyv/WEASQgKLGSVO7+TrYuTgYBOwkOj+pw1iigiUSKzZ YQBiMguoS1xdHARiCgvESzw5GQ3SJyKQIDHt1S82CNtJ4sCfPUwgNouAisTXf9PAZvMK+ErM vX2VHWLpTkaJiT/bmEHmcAoESsxcwAxSwwh02PdTa8B6mQXEJW49mc8EcbCAxJI955khbFGJ l4//QT2iJNG45AkrxGWaEut36UO0KkpM6X7IDrFWUOLkzCcsExjFZiGZOguhYxaSjllIOhYw sqxiFC1OLU7KTTcy1kstykwuLs7P08tLLdnECIyYg1t+q+5gvPzG8RCjAAejEg/vB/Z7YUKs iWXFlbmHGCU4mJVEeH8o3A8T4k1JrKxKLcqPLyrNSS0+xCjNwaIkzsv66XKYkEB6Yklqdmpq QWoRTJaJg1OqgTFX5r+wTcBDP9crq1b0zT5w+5yQzbbuwBz+TaGMNhHTa0w313z82/VdXKft 2tRkv3VJ1omfS1xv1U1xEWYJtPZ/elXqDKPepMehkw5LVYeu+BEW9W/W61cKIhacFVVKqU+z lx/+bDF387+VzNNOM/aIKv6Z2HJjs8n7LrGi9/sufLOMtX9j6aHEUpyRaKjFXFScCABrFcnW lAIAAA==
Archived-At: <http://mailarchive.ietf.org/arch/msg/mmusic/26t3uedSrW1VtNksja0SOWTPUmc>
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: Tue, 08 Mar 2016 19:05:15 -0000

Hi,

Going back to your initial example:

  m=audio [...] 100
  a=sendonly
  a=mid:alice-audio
  a=rtpmap:100 opus/48000/2
  a=ssrc:1111 cname:foo
  [...]
  m=audio [...] 100
  a=sendonly
  a=mid:bob-audio
  a=rtpmap:100 g722/48000
  a=ssrc:2222 cname:bar
  [...]

When we discussed payload type mappings and RTP sessions, it was said that, in a sendonly m- line, the payload type values are simply "place holders", the remote endpoint will tell you what values it want to receive.

So, in your case, you can't say "I am going to send you with PT 100". The answerer is going to say what it wants to receive, so in your case it may e.g. chose 98 for alice-audio and 99 for bob-audio.

Regards,

Christer

v2.23.0 | Report a Bug | By Email