Driver for the Kfir MPEG encoder cards manufactured by BMK http://www.bmk-electronics.de/.
Due to license issues about the microcode you need to obtain the windows driver package from ftp://ftp.visiontech-dml.com/pub/Win9x/KFir/KFirAppVersion4.23/KFirApp4-23_9x.zip
The releases here are really old, please check CVS for newer versions.