If subtitles are out of sync around the 01:56:51 mark, you can shift all subtitles or only a segment.
There are several tools available for converting and editing videos: sone443engsub convert015651 min top
ffmpeg -i sone443.mkv -vf "ass=subs.ass" -c:a copy output_top_subs.mp4
For “min top” requirement, hardcoding is more reliable if you need top-aligned subs on any device. If subtitles are out of sync around the
