IETF Logo Mail Archive

Re: [rtcweb] REMB with many ssrc entries

Harald Alvestrand <harald@alvestrand.no> Fri, 03 March 2017 14:51 UTC

Return-Path: <harald@alvestrand.no>
X-Original-To: rtcweb@ietfa.amsl.com
Delivered-To: rtcweb@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 41DEC129569 for <rtcweb@ietfa.amsl.com>; Fri, 3 Mar 2017 06:51:00 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -1.9
X-Spam-Level:
X-Spam-Status: No, score=-1.9 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RP_MATCHES_RCVD=-0.001, URIBL_BLOCKED=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 LKiBCluuoSJO for <rtcweb@ietfa.amsl.com>; Fri, 3 Mar 2017 06:50:58 -0800 (PST)
Received: from mork.alvestrand.no (mork.alvestrand.no [IPv6:2001:700:1:2::117]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 59BC21295CD for <rtcweb@ietf.org>; Fri, 3 Mar 2017 06:50:57 -0800 (PST)
Received: from localhost (localhost [127.0.0.1]) by mork.alvestrand.no (Postfix) with ESMTP id 3F2977C6019; Fri, 3 Mar 2017 15:50:55 +0100 (CET)
X-Virus-Scanned: Debian amavisd-new at alvestrand.no
Received: from mork.alvestrand.no ([127.0.0.1]) by localhost (mork.alvestrand.no [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id U8AxXt9G9aNu; Fri, 3 Mar 2017 15:50:54 +0100 (CET)
Received: from [IPv6:2001:470:de0a:1::5ea] (unknown [IPv6:2001:470:de0a:1::5ea]) by mork.alvestrand.no (Postfix) with ESMTPSA id 467677C5F94; Fri, 3 Mar 2017 15:50:54 +0100 (CET)
To: Iñaki Baz Castillo <ibc@aliax.net>, "rtcweb@ietf.org" <rtcweb@ietf.org>
References: <CALiegf=hZVR5iMhJ9YDs99ivu0g1XB+hGp0R5moXyaXjgqLYcw@mail.gmail.com>
From: Harald Alvestrand <harald@alvestrand.no>
Message-ID: <60e9275e-3df5-1c92-049d-14102a0bab02@alvestrand.no>
Date: Fri, 03 Mar 2017 15:50:59 +0100
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.7.0
MIME-Version: 1.0
In-Reply-To: <CALiegf=hZVR5iMhJ9YDs99ivu0g1XB+hGp0R5moXyaXjgqLYcw@mail.gmail.com>
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: 8bit
Archived-At: <https://mailarchive.ietf.org/arch/msg/rtcweb/5gFDsUTzS2zQM8Znic1IYUQ3jQI>
Subject: Re: [rtcweb] REMB with many ssrc entries
X-BeenThere: rtcweb@ietf.org
X-Mailman-Version: 2.1.17
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: <https://mailarchive.ietf.org/arch/browse/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: Fri, 03 Mar 2017 14:51:00 -0000

1) REMB is abandoned at this point.
2) The way it was originally designed, it meant that the total should be
100 Kbits/sec. REMB did not take a position on how the sender chose to
allocate bits between the SSRCs, only the total amount of bits sent.

Den 02. mars 2017 22:07, skrev Iñaki Baz Castillo:
> Hi,
> 
> I asked a question regarding REMB with multiple SSRC entries, but got
> not response:
> 
> https://mailarchive.ietf.org/arch/search/?email_list=rmcat&gbt=1&index=ZNGmTcO2LXXevzcCIxUPsL2xHcA
> 
> To summarize, the question is:
> 
> If Alice is sending Bob an audio stream (SSRC 1111) and a video stream
> (SSRC 2222) and Bob sends a REMB feedback message with:
>   - bitrate: 100000 (100kbits/s)
>   - ssrcs: 1111, 2222
> 
> Does it mean that Alice should limit the sum of her sending audio and
> video bitrates to 100kbits/s? or does it mean that Alice can send
> 100kbits/s of audio and 100kbits/s of video (total = 200)?
> 
> Thanks.
> 
>

v2.23.0 | Report a Bug | By Email