What is XviD?
XviD is an open source MPEG-4 video codec designed for everyone. Its purpose is to compress video in order to allow for faster transmission over computer networks or for more efficient storage on computer disks. Hence, XviD can somewhat be seen as a ZIP archive for video. XviD removes information from video that is not important for human perception in order to achieve very high compression rates while still keeping very good visual quality. As an example: uncompressed digital video is huge and takes up about 100 GB HD space per hour at PAL resolution. The same video would require just 500 MB per hour when compressed with XviD at high quality. So XviD can compress video at ratios of 200:1 and more.
Xvid is not a video format – it is a program (codec) for compressing and decompressing to the MPEG-4 ASP format. Since Xvid uses MPEG-4 Advanced Simple Profile (ASP) compression, any video that is encoded with it is termed “MPEG-4 ASP video” – not “Xvid video” – and can therefore be decoded with all MPEG-4 ASP compliant decoders. This includes a large number of media players and decoders, in particular all the ones based on the free/open source libavcodec library from FFmpeg (for example, MPlayer, VLC, ffdshow or Perian).
Xvid encoded files can be written to a CD or DVD and played in some (not all) DivX compatible DVD players and media players. However, Xvid can optionally encode video with advanced MPEG-4 features that most DivX Certified set-top players do not support. Files encoded with global motion compensation, Qpel, MPEG quantization, multiple B-frames or files that exceed the VBV limitations may not play back properly on DivX Certified hardware devices.
Why should I use XviD?
There are a number of reasons for using XviD;
- XviD is free, and can be obtained free of charge and is shipped together with many hardware devices.
- While being free, XviD offers outstanding quality and performance clearly surprising expensive, competing products.
- XviD allows you to create video for interoperable exchange with portable or home multimedia devices as XviD is widely supported in hardware.
- Being open-source, XviD is future-proof and secure to use.