I played with that too before.
`ffmpeg -i input.mp4 -vf "select='gt(scene,0.4)'" -vsync vfr frame-%2d.jpg`
(from the repo pforret/filmpace)
For this project, I want to find an A.I. solution for finding the most 'interesting' frames. Not even sure how to measure interestingness yet, might be the presence of text, the presence of a human ...