Huffyuv
Huffyuv is a very fast, lossless Win32 video codec. Huffyuv is intended to replace uncompressed YUV as a video capture format. It is fast enough to compress full-resolution CCIR 601 video (720 x 480 x 30fps) in real time as it's captured on my machine. Huffyuv also supports lossless compression of RGB data, so it can be used for the output of programs like VirtualDub.
you find more information:
http://www.math.berkeley.edu/~benrg/huffyuv.html