What is Subtitles? Types of Blu-ray Subtitles:
Subtitles are derived from either a transcript or screenplay of the dialog or commentary in films, television programs, video games, and the like, usually displayed at the bottom of the screen. The Bluray m2ts format allows for two types of on-screen overlays that can be used for subtitles. One is based on text but as for now I’ve seen no BluRay using this one for subs. The other one is the PGS (Presentation Grapic Stream) and consists in bitmaps (and the timeframes on which they have to be displayed). That second stream is by far the most commonly used by BluRays.
Extracting Blu-ray Subtitles
Maybe some tools can help you extract PGS subtitles or convert .sup subtitles to ...Read More