dirac

This is a minor release with major algorithmic improvements to motion
compensation and wavelet transforms. Decoding speed has improved by 20%.
The encoder utility has a new commandline interface, so it no longer
requires header files to be created for input video. The bitstream has
changed, so files encoded using earlier versions will be incompatible
with this release. Patches have been provided to include Dirac support
in MPlayer, ffmpeg, and transcode (via ffmpeg). The DirectShow filter
released with the previous release (0.5.1) is compatible with this
release.

This is a minor release with several algorithmic improvements and
bugfixes. Improvements include increased compression performance and
decoding speed, and increased encoding speed using MMX optimization in
motion estimation. New features include a patch for MPlayer-1.0pre6a and
a Directshow filter for playback using Windows Media Player.

This ia a major release with new features and algorithmic improvements. The major changes are a new encoder "C" interface, several algorithmic improvements, several bugfixes, support for building under Windows using MS VC++ .NET 2003, and static and shared library builds using libtool under Unix and GNU/Linux. The libraries have been restructured so that only two libraries are created, one for the encoder and one for the decoder.

The quality metric has changed from PSNR to one
based on 4th powers of errors. This results in
pictures with more stable quality and fewer
artifacts. A bug with scaling motion vectors for
non 4:4:4 chroma format files was fixed. Bugs in
handling 4:4:4 and 4:1:1 chroma formats were
fixed.

Bugs in writing instrumentation data while encoding which caused the diagnostics tool to go into an infinite loop have been fixed. A bug in the diagnostic tool has been fixed. A bug with setting DC band perceptual weight and calculating bit rate has been fixed.