Yeah there's tools that can do it, it's really not too difficult technically because the subtitle format that's most popular is crazy simple. I've used https:/

Yeah there's tools that can do it, it's really not too difficult technically because the subtitle format that's most popular is crazy simple. I've used https://subtitletools.com/merge-subtitles-online https://subtitletools.com/merge-subtitles-online before. There's command-line ones, but I can't remember which I've used.