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Wednesday, September 27, 2006
Divx Announces 6.4 Beta 1 with 1080 support


DivX 6.4 has several new features, including: support for 1080HD encoding, faster multipass encoding, better compression when using the internal resize, adaptive noise reduction, and more.

What's new:

1080HD encoding mode

DivX Codec now includes a 1080HD encoding mode allowing you to create full size 1920 x 1080 resolution video in high quality DivX format. Videos encoded using this new setting are suitable for playback on fast desktop computers and are more likely to play on future hardware devices than videos encoded using unconstrained mode, and unlike unconstrained mode, 1080HD encoding will be available for free in the DivX Community Codec. Both 1080i and 1080p encoding is supported.

New fast 1st pass rate control mode

When you need to produce a video that has to hit a target file size, multipass (e.g. 2-pass) encoding is the way to go for maximum quality consistency, but have you ever wondered which settings can you safely tweak to make a multipass encoding run faster without introducing serious quality problems? Now the DivX 6.4 codec can take care of this for you.

By selecting the new "Multipass, 1st pass (fast)" rate-control option the encoder will automagically adjust your settings during the first pass to maximize the encoding rate, so there is no need to manually change all the settings in the configuration window for every single pass. Even better than this, we've included new optimizations for the fast 1st pass that can reduce even the default "Balanced" mode encoding by up to 35% on a single core PC! Much larger reductions can be seen for higher quality modes.

High efficiency resize filters

We have enhanced the resize filters in the DivX 6.4 codec such that they improve the overall quality/compression of the encoder. The new resize filters reduce encoding rate by approximately 10% over the 6.2.5 codec, but with typical 1:1 aspect correction achieve the same video quality with 15-20% less bitrate (measured using the "lanczos4" filter).

Improved support for interlaced video

New colorspace transforms designed to prevent displaced chroma for interlaced content improve video quality over previous releases. The quality of the built-in de-interlace preprocessing has also been improved. Adaptive noise reduction

The 6.4 codec introduces a new option for noise reduction. Changing the noise reduction option to "Auto-Detect" will cause the preprocessor to adjust the noise reduction level as necessary to reduce grain and low-light noise from the picture without significantly degrading the video. This setting is particularly useful when the noise level various throughout the clip - a common trait for DV cameras in indoor or low-light conditions.

The latest beta can be downloaded at http://download.divx.com/labs/DivXCodec64Beta1.exe


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