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Re: [rtcweb] JSEP question: How to set up simulcast for server-originated calls?

Bernard Aboba <bernard.aboba@gmail.com> Mon, 05 November 2018 22:37 UTC

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From: Bernard Aboba <bernard.aboba@gmail.com>
Date: Mon, 05 Nov 2018 17:37:01 -0500
Message-ID: <CAOW+2dua_8C3HnOmRiXsHgDDOJqqqDRki1XJ7PRk+O+tExXcMw@mail.gmail.com>
To: Iñaki Baz Castillo <ibc@aliax.net>
Cc: Harald Alvestrand <harald@alvestrand.no>, rtcweb@ietf.org
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Subject: Re: [rtcweb] JSEP question: How to set up simulcast for server-originated calls?
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On Mon, Nov 5, 2018 at 5:20 PM Iñaki Baz Castillo <ibc@aliax.net> wrote:

> On Mon, 5 Nov 2018 at 23:16, Bernard Aboba <bernard.aboba@gmail.com>
> wrote:
>
> I'm lost. I've enabled simulcast in Firefox using
> sender.setParameters() after both pc.addTrack() and
> pc.addTransceiver(), and before pc.createOffer().
>
> So I'm not aware of such a limitation in addTrack that "produces just
> 1 encoding that cannot be increased". Why not? Why should it work with
> addTransceiver() and not with addTrack()


[BA] It works today. But currently the specification implies that
setParameters() should fail to set multiple encodings after addTrack. IMHO,
the spec is wrong - it should be allowed at least once before
createOffer(). Should not be too hard to fix.

>
>

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