Windows Essentials Codec Pack versions

v3.6 [Sep 10, 2011]
New in version 3.6:
- Added support for WebM files
- Added AC-3 in MP4 support
- Added a 64-bit version(s)
- New multi-threaded H.264 decoder: ffmpeg-mt
- DTS-HD and Dolby TrueHD bitstreaming support for the ATI Radeon HD5000 series, ASUS Xonar sound cards and Intel Clarkdale CPUs
- New color space converters:
- Supported input color spaces: progressive YV12, progressive NV12, YV16, YUY2
- Supported output color spaces: RGB24, RGB32
- High quality chroma upscaling
- Added dithering to reduce "banding"
- Support for color primary parameters such as ITU-R BT.601/709, input and output levels
- RGB conversion done in 11-bit or higher
- Significant improvements in YV12 -> YUY2, YUY2 -> RGB, and YV12 -> RGB conversion performance
- Requires SSE2-capable CPU; for better performance multi-core CPU recommended
-New RGB conversion options:
- Output levels ("Computer monitor" or "TV/Projector")
- YCbCr specification "Auto" (uses H.264's VUI or width > 1024: BT.709, width <= 1024: BT.601)
-Various improvements in the Subtitle filter:
- Improved rendering quality, memory usage and performance
- General code cleanup
- SSA/ASS subtitles: better compatibility (support for position & move tags), better calculation of line wrapping, new dialog to configure ASS specific options. Also support added for ASS tags within SRT subtitles (SubViewer)