Huffyuv (or HuffYUV) is a lossless video codec created by Ben Rudiak-Gould which is meant to replace uncompressed YCbCr as a video capture format. Despite the "YUV" in the name, it does not compress the YUV color space, but YCbCr. "Lossless" means that the output from the decompressor is bit-for-bit identical with the original input to the compressor, given that no color space conversion takes place. Huffyuv's algorithm is similar to that of lossless JPEG, in that it predicts each sample and then Huffman-encodes the error.
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Implementations
The original implementation was written for Windows by Ben Rudiak-Gould and published under the terms of the GPL. The Huffyuv 1.1 was released in 2000.[1] The implementation is considered very fast, giving a compression throughput of up to 38 megabytes per second on a 416 MHz Celeron. The official Huffyuv has not had a new release since 2002. Huffyuv 2.2 is available on some alternative sites,[2] but is reported to have problems on some computer systems.[3] A Huffyuv 0.2.5 patch is discussed on some forums.[4]
There is a currently developed fork of the code named Lagarith which offers better compression at the cost of sometimes reduced speed on uniprocessor systems[5].
The FFMPEG project also contains an implementation of HuffYUV which allows HuffYUV files to be created & played on Linux and Mac OS X. Additionally, this means that many of the applications which use FFMPEG as a base can also play/create HuffYUV files, including VLC media player, MPlayer and ffdshow.
See also
- Huffman coding
- Adaptive Huffman coding
- PPM compression algorithm
- YCbCr color space
- Lagarith Lossless Video Codec
- MSU Lossless Video Codec
References
- ^ Ben Rudiak-Gould Google Groups - rec.video.desktop, Retrieved on 2009-08-11
- ^ Huffyuv 2.2.0, Retrieved on 2009-08-20
- ^ Huffyuv 2.2 Crashes Xp, Retrieved on 2009-08-20
- ^ Huffyuv 0.2.5 patch, Retrieved on 2009-08-20
- ^ Lagarith Lossless Video Codec. Retrieved 2009-01-28
External links
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