VirtualDub
VirtualDub is a program designed for fast, powerful AVI/ASF/MPEG-to-AVI processing.
This means you put in one AVI, ASF, MPEG-1 file, and you get out another AVI.
You can perform most popular image filters on all the frames of an video file, including average (blur), sharpen, convolute, emboss, and resize.
The audio track can be extracted, or an external audio track (WAV file) inserted.