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Fix T101981: Incorrect playback of AVI files 

Commit bcc56253e2 introduced 3 frame negative offset for seeking. This
can result in negative seek values.

Ensure, that seek value is always positive.
This commit is contained in:
Richard Antalik 2022-10-24 19:40:39 +02:00
parent 5379587772
commit a67876103a
Notes: blender-bot 2024-04-11 14:26:06 +02:00 
Referenced by issue #100749, Blender LTS: Maintenance Task 3.3
Referenced by issue #101981, The video sequencer does not correctly decode an AVI file
1 changed files with 6 additions and 1 deletions
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7
source/blender/imbuf/intern/anim_movie.c
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@ -1100,7 +1100,12 @@ static int64_t ffmpeg_get_seek_pts(struct anim *anim, int64_t pts_to_search)
* experimentally. Note: Too big offset can impact performance. Current 3 frame offset has no
* measurable impact.
*/
return pts_to_search - (ffmpeg_steps_per_frame_get(anim) * 3);
int64_t seek_pts = pts_to_search - (ffmpeg_steps_per_frame_get(anim) * 3);
if (seek_pts < 0) {
seek_pts = 0;
}
return seek_pts;
}
/* This gives us an estimate of which pts our requested frame will have.