IETF Logo Mail Archive

Re: [MMUSIC] T140: Usage of "-"fmt value in dcsa encapsulated fmtp attribute

Paul Kyzivat <pkyzivat@alum.mit.edu> Mon, 16 December 2019 16:10 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 DB77512002F for <mmusic@ietfa.amsl.com>; Mon, 16 Dec 2019 08:10:03 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -2.001
X-Spam-Level:
X-Spam-Status: No, score=-2.001 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_PASS=-0.001] autolearn=ham autolearn_force=no
Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (1024-bit key) header.d=alum.mit.edu
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 gNT_hY3swUaJ for <mmusic@ietfa.amsl.com>; Mon, 16 Dec 2019 08:10:02 -0800 (PST)
Received: from NAM04-CO1-obe.outbound.protection.outlook.com (mail-eopbgr690083.outbound.protection.outlook.com [40.107.69.83]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 0C64A120020 for <mmusic@ietf.org>; Mon, 16 Dec 2019 08:10:02 -0800 (PST)
ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=Rq7cRIwz7xoCNnPy1sgq/0vAFKjSuagoW2q2Cr4AlzbGtFVIUzbLIZhAHSA10c7XH7CRE3PxdIA6xTbc0OumGgJAJqTFsSq64E4IyAl43Q2k7ic6oMceyo7bXRAfca9UCE/X3y89OeLlULw5ctSGE8fekJorfFI4F0gdg77ES/fLfe6eomWsxPdYTfo0ft8DQvVwn2qlQaJVnZrtQ3ZxSIPuHURr1IrzCEF5ecPvMCM+CJxVxJbyufb1WsCbBxSwrtwJ3SwUuXz+aTZJlPv1U+dvTCsM3t70SaTbVGYiUzTkCEmRDhXM/eCLAAa4oiBapCvsQb7py6m4/dEQXwvVAQ==
ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=waacxrkgz32T+thN6iNBlt01OJLwF+riKLhyTnRmgag=; b=XbbPOIRcFnT30/wPLU38LauTOrC8bsoF5guwguOBuqOAL6wpapm40vtTVn+IfkZTl6Sgoc88qwVsZGvbEOP2kVEJP9L+P9ViZFRepz4poHeQo8t4gZOlH9g3ibXfo+ys+NPIKwXvlHi/4C4L6PEb4bcxSk7C7Ltg9hW9NBv9qJ/y8+EVSwBpM2uwIbeq6xd8+7HTmCEqzlQc2LjmGtpAc9f9SnHJeKakUuBN//WUpYLiwRvbiSLO4ySQow0diRGadV0ADPh4QNEnLHH5Vi9ZdOzQ2TOfI5NexJWyrKxC7Seg7G4yY+tji23R16gclmN1d7MwOqlv7T1PJmDEeN+l6Q==
ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass (sender ip is 18.7.68.33) smtp.rcpttodomain=ietf.org smtp.mailfrom=alum.mit.edu; dmarc=bestguesspass action=none header.from=alum.mit.edu; dkim=none (message not signed); arc=none
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=alum.mit.edu; s=selector2; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=waacxrkgz32T+thN6iNBlt01OJLwF+riKLhyTnRmgag=; b=V2BdxBDIx1bsBZuS+ZHRdXTwA6wIk5mdOWtbVuBiWQa1PTRcRaNk9uk1w0Oz1+TymOvveKfPQ4M0hKIlO7ABU6nQ8f4lG9DVyD5rfS3byWW2sBh5KoJjiVyxj61n7hARFgqydFftiuFiYXSGWxCBpdtL2VN4klitX0FFGwvMhyQ=
Received: from DM5PR07CA0065.namprd07.prod.outlook.com (2603:10b6:4:ad::30) by CY4PR12MB1686.namprd12.prod.outlook.com (2603:10b6:910:c::12) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.2538.20; Mon, 16 Dec 2019 16:10:00 +0000
Received: from BL2NAM02FT030.eop-nam02.prod.protection.outlook.com (2603:10b6:4:ad:cafe::6b) by DM5PR07CA0065.outlook.office365.com (2603:10b6:4:ad::30) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.2538.15 via Frontend Transport; Mon, 16 Dec 2019 16:10:00 +0000
Authentication-Results: spf=pass (sender IP is 18.7.68.33) smtp.mailfrom=alum.mit.edu; ietf.org; dkim=none (message not signed) header.d=none;ietf.org; dmarc=bestguesspass action=none header.from=alum.mit.edu;
Received-SPF: Pass (protection.outlook.com: domain of alum.mit.edu designates 18.7.68.33 as permitted sender) receiver=protection.outlook.com; client-ip=18.7.68.33; helo=outgoing-alum.mit.edu;
Received: from outgoing-alum.mit.edu (18.7.68.33) by BL2NAM02FT030.mail.protection.outlook.com (10.152.77.172) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.2538.14 via Frontend Transport; Mon, 16 Dec 2019 16:10:00 +0000
Received: from Kokiri.localdomain (c-24-62-227-142.hsd1.ma.comcast.net [24.62.227.142]) (authenticated bits=0) (User authenticated as pkyzivat@ALUM.MIT.EDU) by outgoing-alum.mit.edu (8.14.7/8.12.4) with ESMTP id xBGG9wfu006828 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=NOT) for <mmusic@ietf.org>; Mon, 16 Dec 2019 11:09:59 -0500
To: mmusic@ietf.org
References: <DB6PR0701MB24219718E7408022DB6F256493550@DB6PR0701MB2421.eurprd07.prod.outlook.com> <1b757fea-b5ce-c498-8100-cb54a4a431fa@omnitor.se> <5FF684F2-955E-4E52-AED5-69D9EA8D39F5@ericsson.com> <dc08b134-7c31-e466-3fcd-287105c1f455@cisco.com> <9e4f0999-0e06-d60d-c160-d95726288d5e@omnitor.se> <764C4101-0BFC-4379-8AA8-A4437992CB20@ericsson.com> <d5189a45-4398-5a4e-6eb0-ac5ec257b3d0@cisco.com> <bbd6694b-d98d-3e85-7996-cdf90033f3f4@alum.mit.edu> <954EC6EE-3F2A-4BD5-BEEB-7BE920A9DE67@ericsson.com>
From: Paul Kyzivat <pkyzivat@alum.mit.edu>
Message-ID: <8dae9394-635b-e2c7-0a72-8ab399daab4d@alum.mit.edu>
Date: Mon, 16 Dec 2019 11:09:58 -0500
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.13; rv:60.0) Gecko/20100101 Thunderbird/60.9.1
MIME-Version: 1.0
In-Reply-To: <954EC6EE-3F2A-4BD5-BEEB-7BE920A9DE67@ericsson.com>
Content-Type: text/plain; charset="utf-8"; format="flowed"
Content-Language: en-US
Content-Transfer-Encoding: 8bit
X-EOPAttributedMessage: 0
X-Forefront-Antispam-Report: CIP:18.7.68.33; IPV:CAL; SCL:-1; CTRY:US; EFV:NLI; SFV:NSPM; SFS:(10009020)(346002)(396003)(39860400002)(136003)(376002)(199004)(189003)(6916009)(76130400001)(70586007)(2906002)(70206006)(786003)(316002)(26005)(2616005)(336012)(956004)(86362001)(75432002)(246002)(31696002)(31686004)(8936002)(8676002)(5660300002)(26826003)(966005)(478600001)(53546011)(36906005)(7596002)(186003)(356004); DIR:OUT; SFP:1101; SCL:1; SRVR:CY4PR12MB1686; H:outgoing-alum.mit.edu; FPR:; SPF:Pass; LANG:en; PTR:outgoing-alum.mit.edu; A:1; MX:1;
X-MS-PublicTrafficType: Email
X-MS-Office365-Filtering-Correlation-Id: 1cbca1f1-2330-4390-0358-08d7824266e5
X-MS-TrafficTypeDiagnostic: CY4PR12MB1686:
X-Microsoft-Antispam-PRVS: <CY4PR12MB16864E010465236B8153711BF9510@CY4PR12MB1686.namprd12.prod.outlook.com>
X-MS-Oob-TLC-OOBClassifiers: OLM:7691;
X-Forefront-PRVS: 02530BD3AA
X-MS-Exchange-SenderADCheck: 1
X-Microsoft-Antispam: BCL:0;
X-Microsoft-Antispam-Message-Info: 7TNfzpGYq9SiXwQYc10GGMxyrMOva1ifWfBVID4R1Bf72JM4iqBZ41JDqq+bo+m45f1IroZBSgOgbtGnkcs82wP9VfTz1IKB+8SJoj23ZZKm3KdKq5H7Ee4RoTYL5w5+PyB1aByOxleSOTx9gbDjUHrIEP14flDR6gRLhv/3+WHRMsa3FXwZ+rNokU2yEoDLOhzHvCJU/RIKYUqlf8cLFu2+OuI0d9jrkarD25ujVx/5ShIMWKzHTZV9AST4DNpMbYUfwnrg5hqQvLgXenxUShfDcYgMDk0cnlzMXImvmO89i5qywlpWgL6Bv3rLejKAUg3f6w6ZA8rBoWM1KqGySFw3IktChGBOkcP7Lj0X9kA8twi9vJnicApizaE/uJ65ima9ekgRkhSYuRsPyztUuuxh0WdyAJSTiC8ixoKd6v4eGK+2hgr4jc23zXaKvOXR0IMzlkDRfyc9w01AM2FrezjhdyMP7mIVIyLLAIX4mE4=
X-OriginatorOrg: alum.mit.edu
X-MS-Exchange-CrossTenant-OriginalArrivalTime: 16 Dec 2019 16:10:00.1090 (UTC)
X-MS-Exchange-CrossTenant-Network-Message-Id: 1cbca1f1-2330-4390-0358-08d7824266e5
X-MS-Exchange-CrossTenant-Id: 3326b102-c043-408b-a990-b89e477d582f
X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3326b102-c043-408b-a990-b89e477d582f; Ip=[18.7.68.33]; Helo=[outgoing-alum.mit.edu]
X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem
X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY4PR12MB1686
Archived-At: <https://mailarchive.ietf.org/arch/msg/mmusic/FMg8mWAebtDr1qTfLWSKVXo0v2M>
Subject: Re: [MMUSIC] T140: Usage of "-"fmt value in dcsa encapsulated fmtp attribute
X-BeenThere: mmusic@ietf.org
X-Mailman-Version: 2.1.29
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: Mon, 16 Dec 2019 16:10:04 -0000

On 12/16/19 11:05 AM, Christer Holmberg wrote:
> Hi,
> 
> I'd be ok with the subchannel identifier.
> 
> I do think it would be good to add some generic text to sdpneg, though, saying that whenever the media description format or PT number would normally be used in an attribute (e.g., the fmtp attribute), when encapsulated in a dcsa attribute the subchannel identifier is used instead.

+1

> Regards,
> 
> Christer
> 
> 
> On 16/12/2019, 17.58, "mmusic on behalf of Paul Kyzivat" <mmusic-bounces@ietf.org on behalf of pkyzivat@alum.mit.edu> wrote:
> 
>      On 12/16/19 10:34 AM, Flemming Andreasen wrote:
>      
>      >> Also, I think we should aim at being aligned with the RTP usage when it comes to SDP attributes.
>      > Agreed again. I think the "fmtp" attribute is the right one to use here
>      > - the question is simply what format value we use. I'm leaning towards
>      > "t140", but we should get some general text in sdpneg to account for
>      > additional media formats in the future.
>      
>      IIUC you are proposing that the format value in fmtp attributes for data
>      subchannels should be the subchannel identifier. Is that right?
>      
>      While that is redundant I won't oppose that.
>      
>      	Thanks,
>      	Paul
>      
>      	
>      
>      _______________________________________________
>      mmusic mailing list
>      mmusic@ietf.org
>      https://www.ietf.org/mailman/listinfo/mmusic
>      
> 
> _______________________________________________
> mmusic mailing list
> mmusic@ietf.org
> https://www.ietf.org/mailman/listinfo/mmusic
>

v2.23.0 | Report a Bug | By Email