wget https://raw.githubusercontent.com/Homebrew/formula-patches/b6e917c/libav/Check-for--no_weak_imports-in-ldflags-on-macOS.patch
wget https://github.com/libav/libav/commit/c6558e8840fbb2386bf8742e4d68dd6e067d262e.patch?full_index=1
wget https://github.com/libav/libav/commit/141c960e21d2860e354f9b90df136184dd00a9a8.patch?full_index=1