If "OKSN-188-engsub" refers to a specific video or media content:
ffmpeg -i oksn-188.mp4 -vf "subtitles=oksn-188.srt" -c:a copy -c:v libx264 -crf 18 output_with_subs.mp4 OKSN-188-engsub convert01-59-32 Min