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blog.mixpeek.com
blog.mixpeek.com
For instance, Ffmpeg can do that with the filter `select=gt(scene,0.3)`. It selects the frames whose scene detection score is greater then 0.3 (the scene change detection score are values between 0 and 1).
which uses https://github.com/Breakthrough/PySceneDetect
under the hood i'm sure it's the same ffmpeg method ;)
Otherwise you’d select frames with 0.3, 0.7, 1.0, 0.7, 0.3 - selecting 5 frames instead of 1?
Two pass with sobel filter comes to mind.