DivX is a package that includes all the DivX codec, player, utilities, and documentation that you need to play DivX files. DivX codec is based on the MPEG-4 compression standard. This codec can reduce an MPEG-2 video (DVD format) to ten percent of its original size. DivX is a digital video compression technology based on the ISO MPEG-4 standard.
Changes in Current Version:
Support for interlaced video in the decoder
New de-ringing post-processing algorithm
Video Buffer Verifier (VBV) model (one and two pass encoding)
Nth PassÖ encoding
Support for DivX Certified Profiles
DivX Decoder verification logo
New internal application programming interface (API)
The motion estimation algorithm is better optimized for High Definition resolutions (up to 1080p, or 1920 x 1080 pixel resolution)
The pre-processing performance is now improved with with the IYUY 4:2:0 color space
Removed MP4creator and the MPEG-4 file output option due to some compliance issues
Removed the Intelligent IVTC functionality due to persistent problems caused by lack of variable frame rate file format support
Changed the block skipping threshold for high quantizers, which improves visual quality when high quantizers are used
Fixed a bunch of little cosmetic bugs in the DirectShow decoder properties page
Fixed a bug where the last P frame before an I frame was not displayed when Smooth Playback was selected
Fixed a practically unnoticeable YUV->RGB16 color conversion rounding bug
Fixed a bug that was the cause of some of VirtualDub's "Cannot Start Video Compression" errors
Fixed a few issues with DivX 3.11 compatibility
Modified the decoder to deal with a bug in the old OpenDivX encoder that set the scalability bit incorrectly in certain cases
Fixed a problem where some rounding operations were not done toward zero, as is required by section 7.4 of the spec
Fixed a bug where some frames would be corrupted by an out-of-range error
Fixed several rounding issues related to MMX/SSE/SSE2 optimizations
