https://bugs.freedesktop.org/show_bug.cgi?id=101254
--- Comment #6 from Andy Furniss adf.lists@gmail.com --- (In reply to joeri.exelmans from comment #5)
Created attachment 131648 [details] latest mpv (from git) verbose output - same problem
Same problem with latest mpv from git. Video never starts.
OK, that's me out of ideas. I can't reproduce this on my R9 285 card.
FWIW with current ffmpeg, vaapi is not a good workaround as it will eventually use all memory. Older ffmpeg won't.