4 ms·
avidemux can do this. Most video formats are not designed or optimized for going backwards so it's much slower.
by etcet 13y ago
avidemux can do this. Most video formats are not designed or optimized for going backwards so it's much slower.
- barrkel 13y agoBut fast forward is usually almost instantaneous, to the point it's often faster to seek backwards, then play back at normal speed, than to wait for a previous frame to be calculated. There's no reason why the software can't cache frames (it's only 25fps normally) or fast forward from the last I-frame. 25 frames of 1080p HD video is 200MB, as uncompressed 32bpp bitmaps. I have 24GB of memory in my PC; that's the worst case, and it's not bad. A bunch of prior frames can be cached, and the next bunch recalculated if it looks like the user is going to continue stepping backwards.