FastCodec - free fast lossless video codec designed for video capture. Another usage - video data archiving. Supported input and output formats are: YUY2, RGB24, RGB32. Codec has two compression modes: lossy (only for RGB input) and lossless.

Specification
Lossless and lossy compression.
Decompression in preview mode.
Frame size restrictions. Lossless compression requires that frame width and height must be a multiple of 4. Lossy compression requires that frame height is multiple of 4 but frame width is multiple of 8.
Supported input and output formats: YUY2/YUNV/V422/YUYV, YVYU, UYVY/Y422/UYNV, RGB24, RGB32.
Codec implemented as VFW driver, FOURCC is FCKK