Make sure you have exported $DEVKITPRO, $DEVKITPPC and $WUT_ROOT vars Clone the latest ffmpeg (https://github.com/FFmpeg/FFmpeg) Copy the configure script (configure_wiiu) inside repo's root
sample workflow
# create a new directory "$HOME/Documents/code"
# download latest ffmpeg source zip an extract to folder "ffmpeg"
git clone https://github.com/hito16/ffmpeg-wiiu.git ffmpeg-wiiu
docker build -t ffmpeg-wiiu ffmpeg-wiiu
docker run -it --rm -v ${PWD}:/project --name ffmpeg-wiiu ffmpeg-wiiu /bin/bash
once in the container
cp ffmpeg-wiiu/configure_wiiu ffmpeg
cd ffmpeg
./configure_wiiu
make
# in docker, you will install ffmpeg to $DEVKITPRO/portlibs
make install