Tom, there is no definite answer, interlaced avc (video source can be laced or progressive) cannot be loaded to vdub properly. Sheryl, you mean my experience with vdub since year 2000 and extensive work with its developers on solving bugs and making new plugins? Well, yeah i have that.
But i have 0 experience with comment vs. Answers here, so i'll put it into comments. Edit/ oh wait, i won't because i can't, i need repuatation! Last sentence of ghis reply is not strictly correct, but i won't go into details, because comment police might get me! –Nov 2 '17 at 19:46.
Unzip the.zip file and drag the plugins64 or plugins32 folder to the VirtualDub installation directory (based on whether you installed the 32-bit or 64-bit version of VirtualDub) to replace the original folder with the same name. Open or edit MP4 in VirtualDub now. Launch VirtualDub and you will find that you can add MP4 videos without hassle.