On Fri, May 11, 2018 at 10:10:42 +0200, Niklas Haas wrote: > Thinking about this logic again, I came to realize that a different > strategy might be to check instead for a minimum threshold brightness > difference in a critical number of different areas of the screen. This > way, a very bright light source appearing or becoming occluded in one > local part of the frame will not trigger a scene change, while a sudden > change in brightness of a large part of the frame will.
Yes, when I read your previous email, that was my thought regarding scene change detection as well. There are others already in ffmpeg, (or perhaps I was looking at the one in the tool "motion"?), I believe. They ideally don't just check for overall brightness change, but over several squares / blocks and take that into consideration. Reasoning: - There's a quite high chance that a scene change with a totally different picture layout has approx. the same average brightness as the scene before. - A strong change in only one or two of e.g. 100 rectangles should not indicate a scene change (while it might indicate motion, different concept there). Moritz _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
