Libdvdcss

libdvdcss (or libdvdcss2 in some repositories) is a free and open-source software library for accessing and unscrambling DVDs encrypted with the Content Scramble System (CSS).wikipedia
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VLC media player

VLClibVLCVLC for iOS
libdvdcss is part of the VideoLAN project and is used by VLC media player and other DVD player software packages, such as Ogle, xine-based players, and MPlayer.
It also gained distinction as the first player to support playback of encrypted DVDs on Linux and macOS by using the libdvdcss DVD decryption library.

Content Scramble System

CSScontent-scrambling systemCSS encryption on DVDs
libdvdcss (or libdvdcss2 in some repositories) is a free and open-source software library for accessing and unscrambling DVDs encrypted with the Content Scramble System (CSS).
Instead, there is libdvdcss, a reverse engineered implementation of CSS.

VideoLAN

VideoLAN Movie CreatorVideoLan Movie Creator (VLMC)VLC
libdvdcss is part of the VideoLAN project and is used by VLC media player and other DVD player software packages, such as Ogle, xine-based players, and MPlayer.
The VideoLAN project also hosts several audio/video decoding and decryption libraries, such as libdvdcss which allows the content of CSS protected DVDs to be unscrambled, x264 which can encode H.264/MPEG-4 AVC video, x265 which can encode HEVC video, x262 which can encode MPEG-2 video, libdca which can decode DTS audio and the git repository of the multimedia framework FFmpeg.

Xine

gxine
libdvdcss is part of the VideoLAN project and is used by VLC media player and other DVD player software packages, such as Ogle, xine-based players, and MPlayer.
xine therefore uses the libdvdcss library, which was created by reverse engineering.

Debian

Debian GNU/LinuxDebian ProjectDebian Linux
Many GNU/Linux distributions do not contain libdvdcss (for example, Debian, Ubuntu, Fedora and openSUSE) due to fears of running afoul of DMCA-style laws, but they often provide the tools to let the user install it themselves.
Even though packages with problems related to their distribution could go into the non-free area, software such as libdvdcss is not hosted at Debian.

Kodi (software)

KodiKodi (formerly XBMC)XBMC
Distributions which come pre-installed with libdvdcss include BackTrack, CrunchBang Linux, LinuxMCE, Linux Mint, PCLinuxOS, Puppy Linux 4.2.1, Slax, Super OS, Pardus, and XBMC Live.
This video-player "core" for video-playback is an in-house developed cross-platform media player, "DVDPlayer", which was designed to play back DVD-Video movies, and this includes support native for DVD-menus, (based on the free open source libraries code libdvdcss and libdvdnav).

HandBrake

Using HandBrake for DVD ripping on macOS requires that one compile and install libdvdcss.
HandBrake’s developers removed libdvdcss (the open-source library responsible for unscrambling DVDs encrypted with the Content Scramble System (CSS)) from the application in version 0.9.2.

Free software

freefree-softwarefreely
libdvdcss (or libdvdcss2 in some repositories) is a free and open-source software library for accessing and unscrambling DVDs encrypted with the Content Scramble System (CSS).

Open-source software

open sourceopen-sourceopen source software
libdvdcss (or libdvdcss2 in some repositories) is a free and open-source software library for accessing and unscrambling DVDs encrypted with the Content Scramble System (CSS).

DVD

DVD-ROMDVDsvideo album
libdvdcss (or libdvdcss2 in some repositories) is a free and open-source software library for accessing and unscrambling DVDs encrypted with the Content Scramble System (CSS).

DVD player

DVDconsumer entertainment devicedisc CD/DVD player
libdvdcss is part of the VideoLAN project and is used by VLC media player and other DVD player software packages, such as Ogle, xine-based players, and MPlayer.

Ogle DVD Player

Ogle
libdvdcss is part of the VideoLAN project and is used by VLC media player and other DVD player software packages, such as Ogle, xine-based players, and MPlayer.

MPlayer

liba52mplayer2GNOME MPV
libdvdcss is part of the VideoLAN project and is used by VLC media player and other DVD player software packages, such as Ogle, xine-based players, and MPlayer.

DeCSS

DVD decryptionMPAA v. 2600total circumvention of CSS
libdvdcss is not to be confused with DeCSS.

Regional lockout

region-freeregion lockedregion coding
If none of them works (for instance, when the DVD drive enforces region coding), libdvdcss then performs a brute-force attack, ignoring the DVD's region code (if any).

Brute-force attack

brute force attackbrute forcebrute-force
If none of them works (for instance, when the DVD drive enforces region coding), libdvdcss then performs a brute-force attack, ignoring the DVD's region code (if any).

Linux distribution

distributiondistributionsLinux
Many GNU/Linux distributions do not contain libdvdcss (for example, Debian, Ubuntu, Fedora and openSUSE) due to fears of running afoul of DMCA-style laws, but they often provide the tools to let the user install it themselves.

Ubuntu

Ubuntu LinuxUbuntu operating systemPPA
Many GNU/Linux distributions do not contain libdvdcss (for example, Debian, Ubuntu, Fedora and openSUSE) due to fears of running afoul of DMCA-style laws, but they often provide the tools to let the user install it themselves.

Fedora (operating system)

FedoraFedora CoreFedora 9
Many GNU/Linux distributions do not contain libdvdcss (for example, Debian, Ubuntu, Fedora and openSUSE) due to fears of running afoul of DMCA-style laws, but they often provide the tools to let the user install it themselves.

OpenSUSE

openSUSE TumbleweedFactoryopenSUSE 13
Many GNU/Linux distributions do not contain libdvdcss (for example, Debian, Ubuntu, Fedora and openSUSE) due to fears of running afoul of DMCA-style laws, but they often provide the tools to let the user install it themselves.

Digital Millennium Copyright Act

DMCADigital Millennium Copyright Act (DMCA)Digital Millennium Copyright Act of 1998
Many GNU/Linux distributions do not contain libdvdcss (for example, Debian, Ubuntu, Fedora and openSUSE) due to fears of running afoul of DMCA-style laws, but they often provide the tools to let the user install it themselves.

Medibuntu

hot-babe
For example, it used to be available in Ubuntu through Medibuntu, which is no longer available.

BackTrack

Distributions which come pre-installed with libdvdcss include BackTrack, CrunchBang Linux, LinuxMCE, Linux Mint, PCLinuxOS, Puppy Linux 4.2.1, Slax, Super OS, Pardus, and XBMC Live.

CrunchBang Linux

CrunchBang
Distributions which come pre-installed with libdvdcss include BackTrack, CrunchBang Linux, LinuxMCE, Linux Mint, PCLinuxOS, Puppy Linux 4.2.1, Slax, Super OS, Pardus, and XBMC Live.

LinuxMCE

Distributions which come pre-installed with libdvdcss include BackTrack, CrunchBang Linux, LinuxMCE, Linux Mint, PCLinuxOS, Puppy Linux 4.2.1, Slax, Super OS, Pardus, and XBMC Live.