Zkusil jsem googlovat: join two lines overlap subtitle
případně: how to fix overlapping subtitles
Např. skript:
https://askubuntu.com/questions/333056/subtitle-overlapping-how-to-comparing-two-timelines-in-subtitles-e-g-001806
Nějaké video:
https://www.youtube.com/watch?v=FqJ21-GaYew