The following libraries need to be installed
sudo apt-get install libfftw3-dev libavdevice-dev libavcodec-dev libavfilter-dev libavutil-dev libswscale-dev libswresaemple-dev libsdl2-dev libboost-dev
Note that currently there is an issue with ffmpeg 4.x.x where software resampling causes a segfault. You'll need to use ffmpeg 3.x.x; this may mean building from source and specifying LIBAV_ROOT_DIR when running cmake.
To use graphical lights for, e.g., debugging in a Windowed environment:
sudo apt-get install libsdl2-gfx-dev
To control the Pi's GPIO, you'll need WiringPi2
sudo apt-get install wiringpi
From the repository root:
mkdir build
cd build
cmake ../
make
If libav is not located under include and lib directories:
cmake ../ -D LIBAV_ROOT_DIR=/path/to/libav/
Note that it was necessary to aggregate all the libraries under a single lib directory for them to be found by the cmake module. E.g., from the libav root directory:
mkdir lib
find ./ -name '*.so*' -exec cp {} ./lib \;
If building from source, make sure you include run configure with
--enable-shared so shared objects are generated.