Re:mpv a free, open-source, and cross-platform media player
by oefrha on Sunday August 18, 2024 @07:57AM
(#41281805)
> I think technically he’s correct (I haven’t worked on media decoding code, but I understand how common video encoding formats work).
He’s technically simply wrong (I have worked on media decoding code, hell I’m working on a related project today). His player supports seeking back by 10 seconds or whatnot, but he insists that somehow to implement precise seeking to the previous frame, you need to seek from the very beginning of the video, no two ways about it:
> There is not a slight technical difficulty. On a logical level, this feature is algorithmically impossible, except for the extreme: You can decode all frames up to the previous one. But this would be far too slow for anything except really short videos.
It’s obvious bullshit, if you encounter one of those pathological videos (that don’t really exist except in his mind or in some test suites) you just give up after a reasonable amount of time, same as how you give up if you can’t seek back ~10s in a reasonable amount of time.
He’s technically simply wrong (I have worked on media decoding code, hell I’m working on a related project today). His player supports seeking back by 10 seconds or whatnot, but he insists that somehow to implement precise seeking to the previous frame, you need to seek from the very beginning of the video, no two ways about it:
> There is not a slight technical difficulty. On a logical level, this feature is algorithmically impossible, except for the extreme: You can decode all frames up to the previous one. But this would be far too slow for anything except really short videos.
It’s obvious bullshit, if you encounter one of those pathological videos (that don’t really exist except in his mind or in some test suites) you just give up after a reasonable amount of time, same as how you give up if you can’t seek back ~10s in a reasonable amount of time.