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They use a hash function to match subtitles. http://trac.opensubtitles.org/projects/opensubtitles/wiki/HashSourceCodes http://trac.opensubtitles.org/projects/o

• tydok 9y ago
  The problem isn't only about matching subtitles to movies but also where to look for subtitles, e.g. opensubtitles.org, subscene.com, etc.
  • bingojess 9y ago
    I believe it just scrapes them all. I can't remember the last time opensubtitles didn't have a sub I was looking for
    • tydok 9y ago
      Perhaps the most difficult problem is to find a subtitle in multiple languages.
      • bingojess 9y ago
        True I have only needed English subs
  • heinrichf 9y ago
    A great script: https://github.com/Diaoul/subliminal https://github.com/Diaoul/subliminal
    • tydok 9y ago
      Very interesting. It contains a few subtitle providers I've never heard before. Thanks for posting it.