mpf-mc (legacy): migration to newer Python and libs

[Marc Rechté]

Hello. I am trying build using up-to-date dependencies (python, cython, python libs). The most challenging part may be ffpyplayer (seems no longer maintained). However, despite being requested in pyproject.toml, I cannot find any place in the source tree using it. Am I missing something ?

[Marc Rechté]

It seems this is kivy, when starting that discovers how to play videos. Nowadays, there is gstreamer as a replacement to ffpyplayer, usable by Kivy.