FFMPEG is required?

[zeke]

Got an error on GitHub Codespaces about libglso.1 something something FFMPEG not install.

apt install ffmpeg did the trick.

Sorry, no logs.

[anotherjesse]

cv2 is used to generate sample input files, I wonder if it could be an option that isn't required? If cv2 isn't installed and a video is required, we can tell the user to provide one?