HW Decode HEVC Rext

[arm64-v9a]

Before requesting a new feature make sure it hasn't been requested yet. https://github.com/mpv-player/mpv/labels/meta%3Afeature-request

Expected behavior of the wanted feature

hwdec=d3d11va/copy can decode HEVC Rext

Alternative behavior of the wanted feature

fix hwdec=qsv/copy + vulkan

Log file

Even if you think it's not necessary at first, it might help us later to find possible issues. Make a log file made with -v -v or --log-file=output.txt, paste it to https://0x0.st/ or attach it to the github issue, and replace this text with a link to it. output.txt

[zhongfly]

I think qsv-copy is invaild value for hwdec optoion, https://mpv.io/manual/master/#options-hwdec

[lavilao]

I think qsv-copy is invaild value for hwdec optoion, https://mpv.io/manual/master/#options-hwdec

me too. I think is for transcoding only

[philipl]

There's no real reason to use qsv. Use vaapi on Linux and d3d11va on windows.