Help in designing a timestamp finder for chapter-less TV shows

[Daring_T]

Hi! Darin_T here,
I have older TV shows that don`t have any chapter files and its hard manually finding the timestamps after episode and episode and episode...


This is my concept, is this the best way to accomplish my goal?

opens the video file
loops frame by frame
____gets the average brightness of the some or all of the pixels.
____saves the darkest frames as timestamps in a file

I wasn't thinking audio would be a good choose to find timestamps because audio does raise "most" of the time but it varies from episode. Even Though doing it be frames will be slow it will be more accurate.

What libraries would you suggest?

Thanks for Reading,
Darin_T