Xvid is an open-source research project focusing on video compression and is a collaborative development effort. All code is released under the terms of the GNU GPL license.

The Xvid video codec implements MPEG-4 Simple Profile and Advanced Simple Profile standards. It permits compressing and decompressing digital video in order to reduce the required bandwidth of video data for transmission over computer networks or efficient storage on CDs or DVDs. Due to its unrivalled quality Xvid has gained great popularity and is used in many other GPLed applications, like e.g. Transcode, MEncoder, MPlayer, Xine and many more.

Since being founded in 2001, the Xvid project focuses on MPEG-4 video compression. Early Xvid versions (0.9.x) implemented MPEG-4 simple profile (SP) de- and encoding. The Xvid 1.0 source tree introduced MPEG-4 advanced simple profile (ASP) compression including all advanced coding tools like B-frames, quarterpixel motion compensation and GMC. The upcoming development branch Xvid 2.0 adds support for MPEG-4 advanced video coding (AVC) de- and encoding up to High Profile and dramatically advances upon the compression performance of earlier Xvid versions.

Summary

* MPEG-4 Video Codec library
* SP/ASP/AVC de-/encoding support
* Open-source software released under GPL license
* Optimized for highest picture quality and archival purposes
* Primary platform PC (Windows and Linux)
* High-performance due to extensive assembly optimizations

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