Awesome idea, room for improvement

This is extremely interesting.

I'm the author of Sub-Zero for Plex and a contributor of Bazarr, which take a different approach to "syncing" subtitles to media by matching the release and media metadata to user generated content.

The subsync approach is one I wanted to do for ages.

Sub-Zero (and, at its core, subliminal) relies on proper offset alignment based on user generated content - this works 95% of the time, as subtitles are usually created for a specific release of a media file.

Being able to sync a subtitle based on its start point is awesome, but it's at least as error prone compared to the matching of metadata and relying on the subtitle author to not mess up.

There are a couple of factors that would need to be addressed before subsync could be integrated into one of the existing solutions (just off the top of my head):

• hearing impaired tags mess up the detection
• commercial breaks and cuts distort the timing of subtitles even after the initial sub entry has been synced correctly
• multiline subtitle entries can mess up the entry point of subsync and subsequent entries

I massively applaud the effort and I hope this can be extended to do a lot more and be a lot more accurate.

No file, test, or entry point is identified in the issue. Start by reviewing the discussion and the existing subtitle synchronization behavior; a concrete change, acceptance criteria, and validation target would need to be defined before implementation can begin.