I had a quick go at trying to run this repo, and in particular the ffmpeg-numpy.ipynb notebook, using MyBinder, and it seemed to work with the following setup:

• rename requirements.txt to eg requirements-dev.py
• create requirements.txt containing:

matplotlib
pillow
graphviz

• create apt.txt containing:

ffmpeg
graphviz

It would probably be cleaner to put these files into a binder/ directory (as per Mybinder docs) but then I don't think the ffmpeg setup.py would run unless you called it with a correct path from a binder/postBuild file?