[FFmpeg-devel] [PATCH 1/2] lavu/pixfmt: add AYUV pixel format

Carl Eugen Hoyos ceffmpeg at gmail.com
Thu Aug 29 00:16:43 EEST 2019


Am Mi., 28. Aug. 2019 um 09:34 Uhr schrieb Fu, Linjie <linjie.fu at intel.com>:
>
> > -----Original Message-----
> > From: ffmpeg-devel [mailto:ffmpeg-devel-bounces at ffmpeg.org] On Behalf
> > Of Carl Eugen Hoyos
> > Sent: Wednesday, August 28, 2019 14:51
> > To: FFmpeg development discussions and patches <ffmpeg-
> > devel at ffmpeg.org>
> > Subject: Re: [FFmpeg-devel] [PATCH 1/2] lavu/pixfmt: add AYUV pixel format
> >
> >
> >
> > > Am 28.08.2019 um 08:22 schrieb Linjie Fu <linjie.fu at intel.com>:
> > >
> > > Add support for packed 4:4:4 pixel format AYUV.
> > >
> > > It is the format that VAAPI/QSV uses when coping with 4:4:4
> > > surfaces.
> >
> > > Alpha channel will be set to default value for HEVC REXT
> > > hw decode.
> >
> > What is the „default value“?
> >
>
> Default zero. (and it should be 255 for display)

If this is not a bug in the driver, there is no alpha channel that can be used.
Rename it to 0YUV and remove the alpha usage.

Carl Eugen


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