Nsfs324engsub Convert020052 Min Top Site

Typical scenario:
nsfs324engsub.mkv contains English subtitles, and you want them as a separate .srt or .ass file.

Solution using ffmpeg (free, command-line): nsfs324engsub convert020052 min top

ffmpeg -i nsfs324engsub.mkv -map 0:s:0 subtitles.srt

If you want to convert subtitle format (e.g., .ass to .srt): Typical scenario: nsfs324engsub

ffmpeg -i input.ass output.srt

GUI alternative:
Use MKVToolNix (mkvmerge GUI) or Subtitle Edit to extract/convert. If you want to convert subtitle format (e

ffmpeg -i nsfs324.mkv -vf "subtitles=nsfs324.eng.srt:force_style='Alignment=9,MarginV=5'" -c:a copy output.mp4

Assume 020052 means 00:02:00.52 (2 minutes, 0.52 seconds).
To extract from the start up to that point (i.e., keep the “top” segment from beginning to 2m0.52s):

ffmpeg -i nsfs324.mkv -t 00:02:00.52 -c copy top_segment.mkv

For precise cutting without re-encoding issues, re-encode:

ffmpeg -i nsfs324.mkv -t 00:02:00.52 -c:v libx264 -c:a aac precise_top.mp4