[FFmpeg-user] Extracting slides from a slideshow recording

[Avid Seeker]

I have a video recording of someone explaining a slideshow. Is there an
ffmpeg command to extract individual unique frames from the video so
that I get the slideshow in slide_%d.png files?

The solutions listed in

- https://stackoverflow.com/questions/11904531/ffmpeg-how-to-extract-frames-as-images-while-removing-sequentially-duplicate-f
- https://video.stackexchange.com/questions/20958/ffmpeg-dropping-duplicate-frames

Do not work when the slide show have fade animation or other kinds of
animation. As a simple algorithm, it should extract frames only that
stayed unchanged for say 2 seconds. As that would mean those frames were
part of the slideshow.

Avid