[Feature request] External subtitle file support for the auto-sub-retimer
I have case where I have I have properly timed English sub files for a show but no internal files. Syncing manually using alass from the command line works flawlessly, but it would be much more convenient if I could do the whole show at once with the script. It feels like it shouldn't be too hard to implement since alass already supports it.
Also, unsure if I should open another issue for this, but I did some testing to compare alass with ffsubsync, and while alass seems to outperform ffsubsync when there's an available reference file, ffsubsync actually had a higher success rate when syncing against audio. Kind of an edge case, but could be worth looking into.