Integrating subtitles into the conversion process can be done "hardcoded" (burned into the video) or as a "soft" track.
For most users: + HandBrake .
Keeping the subtitles in a separate file (like .srt or .vtt) that can be turned on or off during playback. nsfs324engsub convert020052 min free
Could you please clarify what you need? For example: Integrating subtitles into the conversion process can be
ffmpeg -i input.mp4 -t 00:02:00 -c:v libx264 -crf 23 output_clip.mp4 nsfs324engsub convert020052 min free