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this post was submitted on 21 Sep 2023
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Option 3 is the usual method, & it works quite fast on almost any machine that's even capable of decoding high bitrate video fast enough to keep up with its framerate, in the first place. On a HDD, that previous frame may briefly require seeking to get back to, but no such delay occurs with flash storage.
Of course, it doesn't need to be done fast; we're talking about long looks at single frames!
For best results, frame-capture apps use cross-frame interpolation with motion estimation (& these days, AI).
I don't remember the last device I saw, that would struggle with this in any way. It's basically just been dismissed as unimportant, by the VLC devs, rather than actually being all-that-difficult to implement.
I'm shocked that VLC doesn't offer reverse playback by now, given the absolutely enormous video resources & random access storage, we're all blessed with now.
That makes a lot of sense, thanks! I'm a dev but not in video so it's always nice to learn a few things about how problems in other domains are solved.
Reverse playback would be pretty fun! Maybe it's hard to sync up the reverse audio? ๐
Hahahah, very!