Revision of Enable DVD Playback from Tue, 12/08/2015 - 04:54
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Warning - It is illegal to circumvent DRM in many countries, including the United States. Proceed at your own risk.
(In the United States, the law prohibiting the circumvention of DRM is the Digital Millennium Copyright Act, or DMCA. DRM prohibits many activities which would normally be legal, such as watching DVDs with free software.)
By default, Trisquel is unable to play many DVDs because it lacks a library to bypass the CSS (Content Scrambling System) DRM (Digital Restrictions Management) algorithm that prevents access to encrypted DVDs. You need a simple free software library called libdvdcss, which bypasses the encryption, includes an API to access DVDs as a block device, and ignores region codes.
Installation
The repository can be accessed by adding the following lines to /etc/apt/sources.list:deb http://download.videolan.org/pub/debian/stable/ /
deb-src http://download.videolan.org/pub/debian/stable/ /
And by running:
wget -O - http://download.videolan.org/pub/debian/videolan-apt.asc | sudo apt-key add -
And you can then proceed to do apt-get update and then apt-get install libdvdcss2.