Needs upstream patch: https://git.libav.org/?p=libav.git;a=commitdiff_plain;h=141c960e21d2860e354f9b90df136184dd00a9a8;hp=c8bca9fe466f810fd484e2c6db7ef7bc83b5a943 Also my desktop/dev machine died, so I can't commit until I sort out my gpg key :/
libav was removed a while ago.