[FFmpeg-devel] [PATCH 4/6] lavu/hwcontext_vaapi: add vaapi_format_map support for AYUV/Y210/Y410

[Fu, Linjie]

> -----Original Message-----
> From: ffmpeg-devel <ffmpeg-devel-bounces at ffmpeg.org> On Behalf Of
> Carl Eugen Hoyos
> Sent: Wednesday, September 25, 2019 07:33
> To: FFmpeg development discussions and patches <ffmpeg-
> devel at ffmpeg.org>
> Subject: Re: [FFmpeg-devel] [PATCH 4/6] lavu/hwcontext_vaapi: add
> vaapi_format_map support for AYUV/Y210/Y410
> 
> Am Mi., 25. Sept. 2019 um 00:45 Uhr schrieb Mark Thompson
> <sw at jkqxz.net>:
> > From what you've said so far, I get the impression that the alpha channel in
> your AYUV and Y410 formats is not actually supported at all in the hardware
> you have?  (That is, there is no support for decoding video with an alpha
> channel, such as two-layer H.265.)
> 
> The way I understand it is that there is a bug outside of FFmpeg that
> is supposed to be fixed in the future as hevc rext is supposed to
> provide an alpha channel (or can provide an alpha channel).
> 

Thanks Carl.
Yes, that's exactly what current situation is.
See https://github.com/intel/media-driver/issues/719

- linjie