libdvdcss (DVD decryption library)

libdvdcss is a cross-platform library for transparent DVD device

access with on-the-fly CSS decryption. It is used by libdvdread

and most DVD players such as VLC because of its portability and

because, unlike similar libraries, it does not require your DVD

drive to be region locked.

Home Page: http://developers.videolan.org/libdvdcss/