This VfW driver is based on the Intel JPEG Library.
The source code is included in this installer.
Intel JPEG Library Video Codec (ijlvid) runs on Windows 2000, Windows 2003, Windows XP and Windows Vista.
If a PIII 1GHz system can capture videos with the resolution 640 x 480 at 25 fps in
VirtualDub, you will need P4 or its equivalent for full frame capture.
http://www.free-codecs.com/