Xvid (formerly "XviD") is a video codec library following the MPEG-4 standard, specifically MPEG-4 Part 2 Advanced Simple Profile (ASP). It uses ASP features such as b-frames, global and quarter pixel motion compensation, lumi masking, trellis quantization, and H.263, MPEG and custom quantization matrices.

Xvid is a primary competitor of the DivX Pro Codec. In contrast with the DivX codec, which is proprietary software developed by DivX, Inc., Xvid is free software distributed under the terms of the GNU General Public License. This also means that unlike the DivX codec, which is only available for a limited number of platforms, Xvid can be used on all platforms and operating systems for which the source code can be compiled.

In January 2001, DivXNetworks founded OpenDivX as part of Project Mayo which was intended to be a home for open source multimedia projects. OpenDivX was an open-source MPEG-4 video codec based on a stripped down version of the MoMuSys reference MPEG-4 encoder. The source code, however, was placed under a restrictive license and only members of the DivX Advanced Research Centre (DARC) had write access to the project CVS. In early 2001, DARC member Sparky wrote an improved version of the encoding core called encore2. This was updated several times before, in April, it was removed from CVS without warning. The explanation given by Sparky was "We (our bosses) decided that we are not ready to have it in public yet."

Robert William Gary Moore (4 April 1952 – 6 February 2011), was a Northern Irish musician, most widely recognised as a blues singer and guitarist.

In a career dating back to the 1960s, Moore played with artists including Phil Lynott and Brian Downey during his teens, leading him to memberships with the Irish bands Skid Row and Thin Lizzy on three separate occasions. Moore shared the stage with such blues and rock luminaries as B.B. King, Albert King, Colosseum II, George Harrison and Greg Lake, as well as having a successful solo career. He guested on a number of albums recorded by high profile musicians, including a cameo appearance playing the lead guitar solo on "She's My Baby" from Traveling Wilburys Vol. 3.

Moore started performing at a young age, having picked up a battered acoustic guitar at the age of eight. He got his first quality guitar at the age of 14, learning to play the right-handed instrument in the standard way despite being left-handed. He moved to Dublin in 1968 at the age of 16. His early musical influences were artists such as Albert King, Elvis Presley, The Shadows and The Beatles. Later, having seen Jimi Hendrix and John Mayall's Bluesbreakers in his home town of Belfast, his own style was developing into a blues-rock sound that would be the dominant form of his career in music.