Re: [AVTCORE] Confirmation of consensus: way forward on framemarking

Bernard Aboba <bernard.aboba@gmail.com> Tue, 02 February 2021 19:52 UTC

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From: Bernard Aboba <bernard.aboba@gmail.com>
Date: Tue, 02 Feb 2021 11:52:41 -0800
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To: Jonathan Lennox <jonathan.lennox@8x8.com>
Cc: IETF AVTCore WG <avt@ietf.org>
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Subject: Re: [AVTCORE] Confirmation of consensus: way forward on framemarking
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I agree with the consensus.

The only additional comment (other than the ones I previously posted to the
list) is to request that the issue experienced with VP8 PictureID and
TL0PICIDX be documented. This wasn't an issue with framemarking per se, but
it did imply that SFUs needed to parse and modify VP8 payloads and so could
not operate based on framemarking alone. Subsequently, I have heard the
problem being attributed to a deficiency in framemarking (e.g. that a new
RTP header extension can address the problem) when in fact the issue will
also be encountered by other forwarding extensions and a better way forward
is to make VP8 implementations more robust.

On Tue, Feb 2, 2021 at 11:45 AM Jonathan Lennox <jonathan.lennox@8x8.com>
wrote:

> This is to confirm the consensus we had on the way forward on the
> framemarking document in last week’s virtual interim meeting.
>
> The rough consensus of the group was to publish the document as
> Experimental.  We’ll make any necessary easy fixes to the document, but no
> major changes before we request publication.
>
> We’ll also move the section on framemarking for VP9 back into this
> document, now that it’s been removed from the VP9 payload.
>
> If anyone disagrees with this consensus, or has further comments to make,
> please respond here on the AVTCore mailing list.
>
> Thank you!
>
> Jonathan Lennox
> AVTCore co-chair
> _______________________________________________
> Audio/Video Transport Core Maintenance
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>