Re: [avtext] Frame marking & VP9 SVC

[Sergio Garcia Murillo <[e-mail]>]

On 05/07/2017 17:56, Jonathan Lennox wrote:
> Sergio — the updated VP9 payload draft I submitted Monday includes a 
> section describing its usage with frame marking.
>
> Let me know what you think?  It changes the S and T fields to reflect 
> the latest VP9 and frame marking drafts, but it does not include the P 
> or U bits.
>
> I think the intention is that frame marking’s B bit will provide a 
> coarser-grain version of what P and U do (and the “don’t use it with 
> weird structures” requirement will make that sufficient, though that 
> may need to be made more specific).  What do you think?

An SFU requires both VP9  P and U bits in order to be able to do up and 
down switching. So the question is they can be mapped 1-to-1 to the 
frame marking I and B bits. If so, just adding that to the draft that 
the I and B bits on the frame marking extension must be filled with the 
values of the vp9 P and U bits ( I=!P , B=U), would work.

By the way, I liked more the "layer frame" and "frame" vs "frame" 
"picture" (but it is just a personal preference), but I am not sure if 
there haven't been any typos on the renaming, I will have to review it 
in deep because there are some things that seems wrong at first glance 
(but I am probably wrong). Will send a new email if I find anything.

Best regards
Sergio