grf files compatible with MS GraphEdit. See all filters registered in the system, register new filters. Render media files. For each filter in your system you can: see in what file on hard disk it is (for VfW codecs you'll see actual codec file, not ...
You might want to know some of the features of the K-Lite Codec Pack are; a Player, a FFDShow, a DirectShow video filters, a VFW video codecs, a DirectShow audio filters, a ACM audio codecs, a DirectShow source filters, a DirectShow subtitle filter, a Encoding tools, and such tools as GSpot Codec Information Appliance, VobSubStrip, the GraphEdit, MMCompView, ...