The most important features included in VirtualDub are the following:
Accurate frame ratio control.
Create AVI2 with more than 2GB.
Monitorize and control audio level.
Real time processing, apply filters and smooth output.
In short, we can say that it is a really complete video capturer and editor, which will allow us to do everything we want with the video we have captured.
Finally, it is free and really fast.