It should be able to work. U need to dl couple of software. Virtualdub only support few types of video format, avi, .dat. 1st, u need to dl avisynth software. If u got read that site, u should know that u need to type the script in notepad and save it as .avs format.

For mp4, mkv, mov etc, using DirectShowSource("yoursourcepath")
Den save it as .avs format

Open that avs file in virtualdub. U should be able to encode it