dont forget it also need to be done to the other dev packages libavformat-dev, libavfilter-dev, libavdevice-dev libswscale-dev, libpostproc-dev and libav-dbg
dont forget it also need to be done to the other dev packages libavformat-dev, libavfilter-dev, libavdevice-dev libswscale-dev, libpostproc-dev and libav-dbg