When you start VirtualDub, the processing mode is set to “Full Processing Mode”. Most use “Direct Stream Copy” when cutting a video into parts. Full Processing only needed when you need to convert a video into different formats or resolutions,
To set “Video Direct Stream Copy” by default, create a shortcut, and add the following parameter.
/cmd "VirtualDub.video.SetMode(0)"
On my computer shortcut target look like
D:\programs\VD\VirtualDub.exe /cmd "VirtualDub.video.SetMode(0)"
See Video