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In first place, you must know some things about the DVDs:
FILE TYPES
The video files that contains the movie in a DVD have the extension *.vob (video object), generally the movie comes splited in files of 1 GB. In the DVD also you will find another files, like the *.IFO that contains the necessary info for the DVD players can play the movie.
The VOB files (the files really important), contains the video track, compressed in the MPEG-2 format the audio tracks, and the subtitles. Normally the DVDs have many media tracks, separed in "streams" identificated with a hexadecimal address saved in the IFO files. In the others sections we'll explain how to treat the streams.
THE DVD ANTI-PIRACY PROTECTION
- ZONE CODE: The DVD vendors divided the world in zones and they distributed each disc for a specifically zone....but after appear DVD Players "multi-zone", this players are capables to read DVDs of any zone....so don't worry about that...and if you don't have a DVD player multizone on your PC....on this site you will find software that finish with that little problem.
- MACROVISION: Macrovision is a company that developes electronic copy prevention schemes. Some DVDs includes Macrovision technologies to prevent the DVD copy. This protection prevents the direct copy, because itmakes the recorded picture wildly change brightness, rendering it unwatchable.
- CSS: Content-Scrambling System (CSS) is an encryption system that uses a 40-bit encryption algorithm.The CSS contains a key sets that are licensed to manufactors to incorporate them into products such as DVD drives, DVD players and DVD movie releases. CSS key is a collective term for authentication key, disc key, player key, title key, second disk key set, and/or encrypted key. But in October 1999, the algorithm was reverse engineered by Jon Johansen and DeCSS was released.