Xvid is a video codec library following the MPEG-4 standard, in particular MPEG-4 Part 2 Advanced Simple Profile. It uses ASP features such as global and quarter pixel motion compensation, b-frames, lumi masking trellis quantization, custom quantization matrices and MPEG.
Xvid is a rival of the DivX Pro Codec. In comparison with the DivX codec, which could be proprietary software programmed by DivX, Inc., Xvid is free program distributed under the terms of the GNU General Public License. This also means that in contrast to the DivX codec, which is purely available for a limited number of platforms, Xvid can be used in all platforms along with OS for which the origin code can be compiled.
Due to considerations over patents, the official Xvid web page does not offer binary versions of the Xvid codec. Nevertheless, it does link to assisting web sites that provide Video clip for Windows codecs (as well as DirectShow decoding filters) with regard to Microsoft Windows. Xvid is not a video clip format - it is just a program codec for compressing and decompressing to the MPEG-4 ASP format. Since Xvid utilizes MPEG-4 Advanced Simple Profile (ASP) compression, any kind of video that is encoded with it is termed "MPEG-4 ASP video" - not "Xvid video” and can therefore always be decoded with all MPEG-4 ASP certified decoders. This includes a large numbers of media players as well as decoders, in scrupulous all the ones dependent on the free/open source libavcodec library from FFmpeg.
Xvid encoded files could be written to a Compact disc or DVD along with played in some not every DivX compatible DVD players and media players. However, Xvid can optionally encode video along with advanced MPEG-4 features that many DivX Certified set-top players usually do not support. Files protected with global movements compensation, Qpel, MPEG quantization, multiple B-frames as well as files that surpass the VBV limitations might not exactly play back properly upon DivX Certified hardware products.
Most of the times Xvid file becomes non responsive or get corrupted due to virus infection, software conflicts and due to improper system shutdown when Xvid file in use, etc. In such cases, just make use of Xvid repair tool that can efficiently repair corrupt / damaged Xvid files in few mouse clicks.