[FFmpeg-devel] [PATCH v1 1/2] lavu/pixfmt: add new pixel format a2r10g10b10/a2b10g10r10

[Paul B Mahol]

On 9/27/19, Carl Eugen Hoyos <ceffmpeg at gmail.com> wrote:
> Am Fr., 27. Sept. 2019 um 11:02 Uhr schrieb Sun, Xinpeng
> <xinpeng.sun at intel.com>:
>
>> > > Add two 10 bit RGBA pixel format for hardware color space conversion
>> > > support in VAAPI and QSV:
>> > >
>> > > 2:10:10:10 10 bit: A2R10G10B10
>> > > 2:10:10:10 10 bit: A2B10G10R10
>> >
>> > Without more explanation, this patch is not ok.
>
>> The main reasons for adding these two format are as follows:
>> 1. For most HDR monitors, A2R10G10B10 is used for display format for
>> rendering. So this format is important to do 10bit RGB rendering support
>> in ffmpeg.
>
> For which operating systems (and video drivers) is this true?
> And which video players will profit from this filter?
>
>> 2. HW VPP can do both p010->a2r10g10b10 and a2r10g10b10->p010
>> with this patch, which can provide support for hw encode pipeline
>> using a2r10g10b10 as input.
>
> But if the pipeline (that you control, no?) would support GBRP10, not
> only one (very) specific use case would be supported but all thinkable
> use cases, or do I misunderstand?
>
> Afaict, the fact that FFmpeg cannot deal at all with HDR is the most
> pressing issue we have atm.

This is not true.