Re: Fwd: New Version Notification for draft-alvestrand-mmusic-simulcast-ssrc-00.txt

Harald,

Am 11.04.19 um 12:30 schrieb Harald Alvestrand:
> I have made a proposal.

This proposal requires new work for an interim solution. And while 
interim solutions are know to be sticky, here is what I would like to 
see instead (from the Chrome developers, as non-standard as sdpSemantics):

   pc.createOffer({numberOfSimulcastLayers: 3})

which returns just the format Chrome does today. Same for createAnswer.

This would require minimal modifications to existing code (delete 
code!), is very specific and measurable in the browser (along with local 
sdp munging which is the prime evil) which achieves the goal of section 
6 in your draft. As a bonus, a native webrtc.org implementation already 
exists (see issue 9655).

A (somewhat naive) polyfill is in
   https://fippo.github.io/simulcast-playground/chrome
and basically just required moving some code.

> Note: This is strictly a *personal* contribution. Do not attach undue
> authority to it.
> 
> 
> Harald
> 
> 
> 
> -------- Forwarded Message --------
> Subject:  New Version Notification for
> draft-alvestrand-mmusic-simulcast-ssrc-00.txt
> Date:  Thu, 11 Apr 2019 03:28:17 -0700
> From:  internet-drafts@ietf.org
> To:  Harald Alvestrand <harald@alvestrand.no>
> 
> 
> 
> 
> A new version of I-D, draft-alvestrand-mmusic-simulcast-ssrc-00.txt
> has been successfully submitted by Harald Alvestrand and posted to the
> IETF repository.
> 
> Name: draft-alvestrand-mmusic-simulcast-ssrc
> Revision: 00
> Title: Using SSRC with WebRTC Simulcast
> Document date: 2019-04-11
> Group: Individual Submission
> Pages: 6
> URL:
> https://www.ietf.org/internet-drafts/draft-alvestrand-mmusic-simulcast-ssrc-00.txt
> Status:
> https://datatracker.ietf.org/doc/draft-alvestrand-mmusic-simulcast-ssrc/
> Htmlized:
> https://tools.ietf.org/html/draft-alvestrand-mmusic-simulcast-ssrc-00
> Htmlized:
> https://datatracker.ietf.org/doc/html/draft-alvestrand-mmusic-simulcast-ssrc
> 
> 
> Abstract:
> This document describes a convention for sending "a=ssrc" attributes
> in SDP together with "a=simulcast" attributes. This allows SFUs that
> need SSRC information to have this info easily accessible.
> 
> Given that it is intended as an interim measure, it does not aim for
> being published as an RFC.
> 
> 
> 
> Please note that it may take a couple of minutes from the time of submission
> until the htmlized version and diff are available at tools.ietf.org.
> 
> The IETF Secretariat
> 
>

Received on Thursday, 11 April 2019 16:12:46 UTC