| Xvid（旧称为XviD）是一个开放源代码的MPEG-4视频编解码器，它是基于OpenDivX而编写的。Xvid是由一群原OpenDivX义务开发者在OpenDivX于2001年7月停止开发后自行开发的。Xvid
支持多种编码模式，量化（Quantization）方式和范围控，运动侦测（Motion
Search）和曲线平衡分配（Curve），动态关键帧距（I-frame
interval），心理视觉亮度修正，演职员表选项，外部自定义控制，运动向量加速（Hinted
ME）编码，画面优化解码等众多编码技术，对用户来说功能十分强大。
Xvid的主要竞争对手是DivX。但Xvid是开放源代码的，而DivX则只有免费（不是自由）的版本和商用版本。
下载：
xvidcore-1.2.2.tar.gz
xvidcore-1.2.2.tar.bz2
xvidcore-1.2.2.zip
This release is Xvid 1.2.2 bugfix release. It is API compatible with
the previous 1.2.1 stable release. This release contains important,
security-related fixes. Update is highly recommended.
Changes since 1.2.1: xvidcore library
- Workaround for nasm bug with Mach-O/OSX target
- Fix for missing resync marker range check (reported by IBM X-Force. Thanks go to John McDonald and Christopher Valasek)
- Improved precision for RGB<->YUV conversions
- Fix for potential RGB24 access violation
- Updated compiler options for Apple PPC target
- Fixed MSVC6 projects to work for path names with spaces
VFW frontend
DShow frontend
- Bugfix for wrong handling of xvidcore XVID_ERR_MEMORY
return code (reported by IBM X-Force. Thanks to John McDonald and Mark
Dowd)
Changes:
A potential RGB24 access violation was fixed. A fix for a
missing resync marker range check was made. A workaround for a nasm bug
with the Mach-O/OS X targets was implemented. The precision for
RGB<->YUV conversions was improved. | 
