IETF Logo Mail Archive

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

Iñaki Baz Castillo <ibc@aliax.net> Thu, 14 July 2016 09:16 UTC

Return-Path: <ibc@aliax.net>
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 DFA7B12DFAD for <mmusic@ietfa.amsl.com>; Thu, 14 Jul 2016 02:16:41 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -2.6
X-Spam-Level:
X-Spam-Status: No, score=-2.6 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, RCVD_IN_DNSWL_LOW=-0.7] autolearn=unavailable autolearn_force=no
Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=aliax-net.20150623.gappssmtp.com
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 q2PLBfCECHvW for <mmusic@ietfa.amsl.com>; Thu, 14 Jul 2016 02:16:39 -0700 (PDT)
Received: from mail-yw0-x22a.google.com (mail-yw0-x22a.google.com [IPv6:2607:f8b0:4002:c05::22a]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 64AE112DE57 for <mmusic@ietf.org>; Thu, 14 Jul 2016 02:14:05 -0700 (PDT)
Received: by mail-yw0-x22a.google.com with SMTP id v186so5287331ywd.0 for <mmusic@ietf.org>; Thu, 14 Jul 2016 02:14:05 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=aliax-net.20150623.gappssmtp.com; s=20150623; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :cc:content-transfer-encoding; bh=wz7bqGpuSZN8qY6dackoHBi3A9PONOswWMD9OMYwS58=; b=dTw3UjriUWL/e7EPFMB9rwhVRO1pAE17x9bx+vR0ASpr0cxG/rocfGQu6xriHU6c1S GH2Ldep44X4u/20Hz2iOpDjz7M+pCaircubMt+JNDLhj617uwtpuCGfWwBqeI43k/HwU nVmRCc6/XqFw9x96HlrNewk9DVFss4PlnmKAsJwA7oZ4gTzrEizc+PmBKruPXWZTuVhs EPioZXRxm/cas8ARxuXXHfs+KpFJdknwtAwUDwJjsymqT0fU0qVGMCyv0VZdjGgX/dGC sIihxPFrCVnNb6FYfGDLY0g12DR0nFtKbAsPXPED8Pk/u/JrAOH6qmhHRALw16v0Y2EL oyUg==
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to:cc:content-transfer-encoding; bh=wz7bqGpuSZN8qY6dackoHBi3A9PONOswWMD9OMYwS58=; b=AGq6Vbol9cUKYV4QUWaCXTi9IvQ8VH+/edVW57xwn/Taq4YSm69mNfNeBLtZLkh6kg FvOd2ExN0oL0SWfdnjwVOvCK1tJwOVVhroYf46pDRhD2YBi0ugJVlgKEutKkxODLJxW3 WYXsH5E211Uxw/KyZQJQhD+hLmtVq3s+rP4Nrp10JmGgU5PA+6eFkGLXWNHsAKfuAidF 76coBTj9B2ttWjrakQ/8K+qZAlX1KCfHllNFAjXbWrT3eRh3PqsHIfLTMzuS22KrcaCf DTmPS8/rhfZCOKyLjkbYBvNLr4z6W31LeHlqB7gM2VKWIFEmb77siJuwMFSYDY9VSKzO 3DXA==
X-Gm-Message-State: ALyK8tIFda4jiLWnJAz4FVifehm733AFRruGv8GHHiWRDes5SA5TCBTtJ8TJ9nxepjRLaF5IiFXAObmj3+kneg==
X-Received: by 10.13.255.71 with SMTP id p68mr8832476ywf.101.1468487644622; Thu, 14 Jul 2016 02:14:04 -0700 (PDT)
MIME-Version: 1.0
Received: by 10.37.33.213 with HTTP; Thu, 14 Jul 2016 02:13:45 -0700 (PDT)
In-Reply-To: <D3AD2F4A.BEE3%christer.holmberg@ericsson.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>
From: Iñaki Baz Castillo <ibc@aliax.net>
Date: Thu, 14 Jul 2016 11:13:45 +0200
Message-ID: <CALiegf=VCCK0SYysZ3VbP7WRrGFE_3P-Fn2BYouVE4faX1JMzw@mail.gmail.com>
To: Christer Holmberg <christer.holmberg@ericsson.com>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable
Archived-At: <https://mailarchive.ietf.org/arch/msg/mmusic/HbhaSz84MeuzhOC7EWo9l4apcEs>
Cc: Jonathan Lennox <jonathan@vidyo.com>, mmusic <mmusic@ietf.org>, IETF AVTCore WG <avt@ietf.org>
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 09:16:42 -0000

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.


-- 
Iñaki Baz Castillo
<ibc@aliax.net>

v2.23.0 | Report a Bug | By Email