Re: [rtcweb] Video codec selection - way forward

David Singer <singer@apple.com> Thu, 21 November 2013 17:33 UTC

Return-Path: <singer@apple.com>
X-Original-To: rtcweb@ietfa.amsl.com
Delivered-To: rtcweb@ietfa.amsl.com
Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 84FE01AE02A for <rtcweb@ietfa.amsl.com>; Thu, 21 Nov 2013 09:33:23 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -7.427
X-Spam-Level:
X-Spam-Status: No, score=-7.427 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RCVD_IN_DNSWL_HI=-5, RP_MATCHES_RCVD=-0.525, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001] autolearn=ham
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 7COCQP9pE68u for <rtcweb@ietfa.amsl.com>; Thu, 21 Nov 2013 09:33:22 -0800 (PST)
Received: from mail-out.apple.com (bramley.apple.com [17.151.62.49]) by ietfa.amsl.com (Postfix) with ESMTP id 5291A1ADFFF for <rtcweb@ietf.org>; Thu, 21 Nov 2013 09:33:22 -0800 (PST)
MIME-version: 1.0
Content-type: text/plain; charset="windows-1252"
Received: from relay5.apple.com ([17.128.113.88]) by mail-out.apple.com (Oracle Communications Messaging Server 7u4-23.01 (7.0.4.23.0) 64bit (built Aug 10 2011)) with ESMTP id <0MWM002LTJFA44R1@mail-out.apple.com> for rtcweb@ietf.org; Thu, 21 Nov 2013 09:33:15 -0800 (PST)
X-AuditID: 11807158-b7efa6d000002d28-8b-528e43db4fb6
Received: from spicerack.apple.com (spicerack.apple.com [17.128.115.40]) (using TLS with cipher RC4-MD5 (128/128 bits)) (Client did not present a certificate) by relay5.apple.com (Apple SCV relay) with SMTP id BB.AF.11560.BD34E825; Thu, 21 Nov 2013 09:33:15 -0800 (PST)
Received: from singda.apple.com (singda.apple.com [17.197.32.11]) by spicerack.apple.com (Oracle Communications Messaging Server 7u4-24.01(7.0.4.24.0) 64bit (built Nov 17 2011)) with ESMTPSA id <0MWM00D2YJFEKX10@spicerack.apple.com> for rtcweb@ietf.org; Thu, 21 Nov 2013 09:33:15 -0800 (PST)
From: David Singer <singer@apple.com>
In-reply-to: <528E431D.6030703@nostrum.com>
Date: Thu, 21 Nov 2013 09:33:14 -0800
Content-transfer-encoding: quoted-printable
Message-id: <A0CAC43B-1411-4D9D-8763-89CCB58066CF@apple.com>
References: <D9C9C6C10CA24644B3A854DB0C12E7D5014C12B5F1@gbplmail03.genband.com> <52891EDB.2050607@googlemail.com> <D0698C9F-967F-4797-A9F3-E461B9DAE8EB@apple.com> <528B2ABE.4040701@googlemail.com> <BLU169-W24713EECAF0BE76A85E94B93E60@phx.gbl> <528C79AD.10608@googlemail.com> <BLU169-W19675CF49C4FAF3F889E4793E60@phx.gbl> <528D0355.3090603@googlemail.com> <55E140BF-D025-4556-A4F2-2441EE766F6B@apple.com> <528E431D.6030703@nostrum.com>
To: Adam Roach <adam@nostrum.com>
X-Mailer: Apple Mail (2.1822)
X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFlrMLMWRmVeSWpSXmKPExsUi2FCsoXvbuS/IoPUbp8Xaf+3sDoweS5b8 ZApgjOKySUnNySxLLdK3S+DK+LVhBnPBcdaKe9vbGRsYN7J0MXJySAiYSMy8tZQZwhaTuHBv PVsXIxeHkMBkJol971qhnNVMElN//mTqYuTgYBbQk7h/UQukgRfIvNV8nxkkLCxgKXHhuAlI mE1AVeLBnGOMIDangLbE1ZOPweazAMXbrpwB28ssICzx/fE9KFtb4sm7C6wgY3gFbCSW3cmG 2HqAWWLygunsIDUiAooSbYdvQt0pK7H7+XfmCYwCsxAOmoXkoFlIpi5gZF7FKFCUmpNYaaqX WFCQk6qXnJ+7iREcdIUROxj/L7M6xCjAwajEw7vTsi9IiDWxrLgy9xCjBAezkgjvV3WgEG9K YmVValF+fFFpTmrxIUZpDhYlcV7VGd1BQgLpiSWp2ampBalFMFkmDk6pBsaSZjab6uap5V0W xssUbxtE1i0+KLxuznxTgdf73ebtWXHqc4e05cf1CyvkPix4IOq51fI5fxfLnznzv0/M0Zmm 7xB/Lvlwm/BZg7wtHm1h6m++b7UyFejZ+7x7ar7Gw0R1Dhf/f1UPTRovZ58qs7Ff7fh7i/kT x44l/AbaxR/WMF6Jtz/Fm6bEUpyRaKjFXFScCACdqYkSNgIAAA==
Cc: rtcweb@ietf.org
Subject: Re: [rtcweb] Video codec selection - way forward
X-BeenThere: rtcweb@ietf.org
X-Mailman-Version: 2.1.15
Precedence: list
List-Id: Real-Time Communication in WEB-browsers working group list <rtcweb.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/rtcweb>, <mailto:rtcweb-request@ietf.org?subject=unsubscribe>
List-Archive: <http://www.ietf.org/mail-archive/web/rtcweb/>
List-Post: <mailto:rtcweb@ietf.org>
List-Help: <mailto:rtcweb-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/rtcweb>, <mailto:rtcweb-request@ietf.org?subject=subscribe>
X-List-Received-Date: Thu, 21 Nov 2013 17:33:23 -0000

On Nov 21, 2013, at 9:30 , Adam Roach <adam@nostrum.com> wrote:

> On 11/20/13 11:42, David Singer wrote:
>> So, would “MUST implement at least two of (H.264, VP8, H.263)” work?
> 
> I have to give you a lot of credit for coming up with a "pick two of three" formulation. That's a clever way to guarantee overlapping codecs between any two pairwise implementations. I'm still not sure it's the right direction for *this* decision, but it sure is an interesting thought exercise.
> 
> /a

Thanks, but not my idea;  that was the H.261 “pick two of three”.  I am just suggesting H.263 may be a better choice.

David Singer
Multimedia and Software Standards, Apple Inc.