EVX2: Chennai is a lossless variation of the Cairo codec. It retains most of the same features of Cairo, including its motion prediction and differential coding
stages, but skips the lossy quantization and chroma subsampling phases.
For more information about Cairo, check out its project page.
EVX is a collection of five evolutionary codecs that are used for experimentation and education. They are not designed for productization and lack many important features and optimizations. Nonetheless, they are an extremely useful tool for testing out new compression theories and formats. The following diagram illustrates the high level progression of each codec in the family.
virtual & augmented reality
3D video format support
large macroblock support
full rate YCbCr 4:4:4 mode
video analysis & debugging tool
The source code to Chennai is not yet available. In the meantime you can check out the source code for Cairo, which serves as the basic framework for Chennai.
For more information about Chennai, please feel free to drop me a line. I plan on eventually posting the full source code, but other priorities are blocking this work for the moment. In the meantime, check out my blog for articles related to this codec and video compression in general.