This takes the ffmpeg binaries that were compiled in ffmpeg-build and
places them inside a base debian container. Size is much smaller
(~130MB in this container vs ~360MB in the original debian container).
docker run nachochip/ffmpeg -i INPUT -vcodec copy -acodec copy - > OUTPUT.mp4
This container uses the entrypoint="ffmpeg"
There's no webm -support (libvpx)?