Capturing AVS

Hello! Is there anyone who knows how to capture a visualisation? I'm interested in capturing these, prefferable using DV format (this is not an absolute requirement), in order to use it in some personal footage. Thank you!

try http://www.deviantart.com/view/1647293/ , It captures Vistualisations into an AVI, unfortunately it isn't all that stable...

I have to say, given his record (I'm still sour about metalballs 3d), stability isn't a big thing.

There's also one from pixelcorps.
saver.ape