CSS
The Default settings should be fine for CSS as DVD Decrypter will try to read
the DVD as every DVD software player does using the I/O Key Exchange.
If this fails to work, usually when the region code of the DVD doesn't match
the drive, Brute Force setting is used. Unless you have major issues
with the DVD, this setting should be left at default. The Detect Mastering
Errors will perform another CSS keysearch in every cell. This will enable
DVD Decrypter to rip corrupt discs

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