Rescale subtitle timings after a frame-rate conversion.
fix_sub_duration rewrites each cue's end time to match how long it was actually displayed, which is the fix for subtitles that drift out of sync after a VFR → CFR or a speed change.
fix_sub_duration
Rescale subtitle timings after a frame-rate conversion.
fix_sub_durationrewrites each cue's end time to match how long it was actually displayed, which is the fix for subtitles that drift out of sync after a VFR → CFR or a speed change.