Jur153engsub Convert020006 Min Install

If the video already has English subtitles (softcoded):

ffmpeg -i input.mkv -map 0:s:0 -c copy subtitles.ass

For .srt output:

ffmpeg -i input.mkv -map 0:s:0 subtitles.srt

ffmpeg -i jur153engsub.srt output.vtt

ffmpeg -i jur153engsub.srt -ss 00:20:00 -to 00:20:06 output_subset.srt

(Note: ffmpeg handles subtitle extraction well; use -c:s mov_text for MP4)