[racket] H264 Codec in Racket

I'm considering writing an H.264 encoder/decoder in Racket. Has anyone tried such a thing before? 

Codecs require a lot of bit-whacking and the h264 standard is particularly convoluted. Efficiencies are obtained in C in many different and usually complex ways. Codec experts usually recommend starting at C/++ and go to assembly to extract further performance. 

Does any one have thoughts on this? Would someone be interested in working with me on an open-source project for this? I expect an exercise like this will also push the Racket implementation to deliver higher performance, or will establish a proof point about how good the implementations is.  

Best,

Anurag. 
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