If you obtained nsfs324engsub.mkv or .mp4 , and it has engsub in the name, then are either embedded as a soft subtitle track or burned into the video.
ffmpeg -i nsfs324.mkv -ss 00:02:52 -to 00:05:00 -c copy -map 0 clip.mkv To include English soft subs: nsfs324engsub convert020052 min
ffmpeg -ss 00:02:52 -i nsfs324.mkv -to 00:02:30 -vf "subtitles=nsfs324.mkv:si=0" -c:a copy output.mp4 ( si=0 selects first subtitle stream) If you actually need to start conversion at 02:00:52 (the 2-hour mark), just adjust the -ss parameter: If you obtained nsfs324engsub
ffmpeg -i nsfs324.mkv -ss 00:02:52 -to 00:05:00 -c copy -map 0:v -map 0:a -map 0:s:0 clip.mkv To English subtitles for that segment: If you obtained nsfs324engsub.mkv or .mp4
❌ ✅ Run ffprobe nsfs324.mkv to see all streams.