The string "nsps445engsub convert013008 min" could be broken down as follows:
If subtitles are embedded as images (PGS), use Subtitle Edit to OCR to SRT. nsps445engsub convert013008 min
Conclusion
Command or batch job token
ffmpeg -i nsps445engsub -itsoffset -01:30:08 -map 0:s:0 -c copy shifted_subs.srt