Command line tool 'subs' and its perl backend Subtitles.pm provide means for simple re-timing, joining, splitting, and format conversion of the subtitle files. Supported subtitle formats are .srt, .sub, .smi, and .idx.
User friendly command line tool for adjusting movie subtitles in various formats.
Support for converting from one format to another (currently microdvd, subrip, TMplayer, CSV but more to come). Time stamps adjustment. Show duration of subtitle adjustment