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

[Carl Eugen Hoyos]

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).

Carl Eugen