Blender Git Commit Log
Git Commits -> Revision 6c33d3d
Revision 6c33d3d by Richard Antalik (master) March 30, 2021, 00:58 (GMT) |
Fix T86944: Incorrect seeking in some movies `av_seek_frame()` failed to seek to nearest I-frame. This seems to be a bug or not implemented feature in FFmpeg. Looks like same issue as ticket https://trac.ffmpeg.org/ticket/1607 on ffmpeg tracker. If seeking is done using format specific function (`read_seek2`) field of `AVInputFormat` is set, `see av_seek_frame()`, use `av_seek_frame()` function. Otherwise use wrapper that actively searches for I-frame packet. Searching is flexible and tries to do minimum amount of work. Currently it is limited to equivalent of 25 frames, which may not be enough for some files, but there may be files with no I-frames at all, so it is best to keep this limit as low as possible. Previously this problem was masked by preseek, which was hard-coded to 25 frames. This was removed in rB88604b79b7d1. If this approach would be unnecessary for some formats, in worst case file would be seeked 2 times which is very fast, so there will be no visible impact on performance. Reviewed By: sergey Differential Revision: https://developer.blender.org/D10845 |
Commit Details:
Full Hash: 6c33d3d01b6237cbe854b1d6ca54ac9680bb0563
Parent Commit: ffbe803
Lines Changed: +52, -1
1 Modified Path:
/source/blender/imbuf/intern/anim_movie.c (+52, -1) (Diff)