Tested with libav 11.3
./configure --prefix=/opt/av --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-hardcoded-tables --enable-avresample --host-cflags= --host-ldflags= --enable-libx264 --enable-libmp3lame --enable-libvorbis --enable-libvpx --enable-libfaac --enable-libspeex --enable-nonfree --enable-vda

WIP av file interface, kind of works, need further tweak & cleanup