IETF Logo Mail Archive

Re: [MMUSIC] [AVTCORE] BUNDLE: a single stream with multiple MIDs?

Jonathan Lennox <jonathan@vidyo.com> Thu, 14 July 2016 14:23 UTC

Return-Path: <prvs=1003fa822b=jonathan@vidyo.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 9C7B412D7CA; Thu, 14 Jul 2016 07:23:13 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -1.831
X-Spam-Level:
X-Spam-Status: No, score=-1.831 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_SORBS_WEB=0.77, SPF_PASS=-0.001] autolearn=ham autolearn_force=no
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 oTR8-BKX9EK0; Thu, 14 Jul 2016 07:23:12 -0700 (PDT)
Received: from mx0a-00198e01.pphosted.com (mx0a-00198e01.pphosted.com [67.231.149.202]) (using TLSv1.2 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 6993312D143; Thu, 14 Jul 2016 07:23:12 -0700 (PDT)
Received: from pps.filterd (m0073109.ppops.net [127.0.0.1]) by mx0a-00198e01.pphosted.com (8.15.0.59/8.15.0.59) with SMTP id u6EEKhCV016213; Thu, 14 Jul 2016 10:23:06 -0400
Received: from mail.vidyo.com ([162.209.16.214]) by mx0a-00198e01.pphosted.com with ESMTP id 241vjvvmw6-2 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=NOT); Thu, 14 Jul 2016 10:23:06 -0400
Received: from 492132-EXCH1.vidyo.com ([fe80::50:56ff:fe85:4f77]) by 492133-EXCH2.vidyo.com ([fe80::50:56ff:fe85:6b62%13]) with mapi id 14.03.0195.001; Thu, 14 Jul 2016 09:23:05 -0500
From: Jonathan Lennox <jonathan@vidyo.com>
To: Iñaki Baz Castillo <ibc@aliax.net>
Thread-Topic: [MMUSIC] [AVTCORE] BUNDLE: a single stream with multiple MIDs?
Thread-Index: AQHR3bAS2iXZNVjDUESNYXQcq89uRqAYTueA
Date: Thu, 14 Jul 2016 14:23:04 +0000
Message-ID: <B1AA7467-4829-4383-805D-8F99CA99CEEC@vidyo.com>
References: <6C642BD1-679B-4CCA-9148-DD4A7ACB48A4@vidyo.com> <CAMRcRGRMp-tehSjwaXh4rzwedsHHjXaxhJ=pd0-9XiSCiLG_2Q@mail.gmail.com> <7E00EB16-72FE-4A1E-A268-66674361FB2B@vidyo.com> <CAJrXDUFpkVegw_hb4hFVP0Bme=6avVC8J3hucuhHDbvOamn-2w@mail.gmail.com> <3BECBA70-B73C-4E87-8A69-55AAA406A8B9@vidyo.com> <CAJrXDUETxAbt4pP2ShAKuYSaDdRk5u_c1antpVATE+NinAaiVA@mail.gmail.com> <D3AD2F4A.BEE3%christer.holmberg@ericsson.com> <CALiegf=VCCK0SYysZ3VbP7WRrGFE_3P-Fn2BYouVE4faX1JMzw@mail.gmail.com>
In-Reply-To: <CALiegf=VCCK0SYysZ3VbP7WRrGFE_3P-Fn2BYouVE4faX1JMzw@mail.gmail.com>
Accept-Language: en-US
Content-Language: en-US
X-MS-Has-Attach:
X-MS-TNEF-Correlator:
x-originating-ip: [160.79.219.114]
Content-Type: text/plain; charset="utf-8"
Content-ID: <3EE6A670460C494FA033C84FB1FADC91@vidyo.com>
Content-Transfer-Encoding: base64
MIME-Version: 1.0
X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:5.15.96, 1.0.3, 0.0.0000 definitions=2016-07-14_08:2016-07-14,2016-07-14,1970-01-01 signatures=0
X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 suspectscore=0 phishscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=7.0.1-1603290000 definitions=main-1607140154
Archived-At: <https://mailarchive.ietf.org/arch/msg/mmusic/oFuNdrG-sIvcN8oBbAaF5IeEI9U>
Cc: mmusic <mmusic@ietf.org>, IETF AVTCore WG <avt@ietf.org>, Christer Holmberg <christer.holmberg@ericsson.com>
Subject: Re: [MMUSIC] [AVTCORE] BUNDLE: a single stream with multiple MIDs?
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, 14 Jul 2016 14:23:13 -0000

> On Jul 14, 2016, at 5:13 AM, Iñaki Baz Castillo <ibc@aliax.net> wrote:
> 
> 2016-07-14 11:03 GMT+02:00 Christer Holmberg <christer.holmberg@ericsson.com>:
>> Second, IF we want to do something like this, should it instead be done on a
>> higher application/CLUE layer?  Why start mixing up the lower-layer MID
>> semantics etc?
> 
> Some ugly stuff regarding SDP is the fact that m-lines are indexed by
> their position, which means that they cannot be removed within the
> same session.
> 
> Then a=mid comes to the rescue and provides a per m-line unique
> identifier, leaving the door open for a future spec change allowing
> m-lines removal (have you ever seen how an SDP from a SFU with
> participants entering and leaving the room grows?).
> 
> The current proposal breaks that. Please let's MID to be a single,
> unique and mandatory attribute per m-line.

I’m not proposing to change this.  There will still be a single MID per m-line.

What I’m proposing instead is that the mapping between RTP Streams and m-lines is not necessarily 1-to-1 — an RTP stream can provide the media for more than one m-line at a time.

v2.23.0 | Report a Bug | By Email