On Thu, Aug 29, 2019 at 1:47 PM Carl Eugen Hoyos <ceffm...@gmail.com> wrote: > > > > Am 29.08.2019 um 03:34 schrieb Fu, Linjie <linjie...@intel.com>: > > >> -----Original Message----- > >> From: ffmpeg-devel [mailto:ffmpeg-devel-boun...@ffmpeg.org] On Behalf > >> Of Carl Eugen Hoyos > >> Sent: Thursday, August 29, 2019 05:17 > >> To: FFmpeg development discussions and patches <ffmpeg- > >> de...@ffmpeg.org> > >> Subject: Re: [FFmpeg-devel] [PATCH 1/2] lavu/pixfmt: add AYUV pixel format > >> > >>>> Am Mi., 28. Aug. 2019 um 09:34 Uhr schrieb Fu, Linjie > >>>> <linjie...@intel.com>: > >>>> > >>>> -----Original Message----- > >>>> From: ffmpeg-devel [mailto:ffmpeg-devel-boun...@ffmpeg.org] On > >> Behalf > >>>> Of Carl Eugen Hoyos > >>>> Sent: Wednesday, August 28, 2019 14:51 > >>>> To: FFmpeg development discussions and patches <ffmpeg- > >>>> de...@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...@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. > > > > From the pixel format level, adding AYUV format is for a more > > fundamental/common usage. > > Yes, but the new pixel format will only be accepted if it is needed for > hardware compatibility. > If the hardware only supports 0YUV, it cannot be used to argue in favour of a > new AYUV format. >
AYUV is a standard format used on Windows and documented by Microsoft as the recommended 4:4:4 8-bit format for all purposes. Its hardly a niche format. Its perfectly appropriate to support it. - Hendrik _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
