I am trying to extract a DVD. Prior use of VOB2MGP worked fine; this is the first time this problem shows up.
The preview of the DVD works fine; I see the movie trailers etc. and then end up on the DVD's menu.
From there I can select which section of the DVD i want to see.
VOB2MPG does not allow me to select an individual preview (double-click on the chapters from the listing on the left of the application does not work). The only way to see a preview is to make the selection on the DVD root menu when it shows on the screen on the right.

The extraction completes without error messages. However, playing the resulting file only has sound and no video whatsoever.

What can i do do fix this?