Pompei (documentation and examples here) is a python package and command line utility to generate photo mosaics from movie frames, like this one:
It is an open-source software originally written by Zulko and released under the MIT licence. Everyone is welcome to contribute or ask for support on the Github project page.
If you have PIP installed:
(sudo) pip install pompei
If you don't have setuptools
installed the command above will fail. Install setuptools
with
(sudo) pip install setuptools
Another way of installing pompei is to unzip the source code in a directory and type in a terminal:
sudo python setup.py install