The command that it's erroring on seems to be just trying to create the static image.

Hmm. Googling on that error message shows me a page that the DIKO guy fixed that bug in DVDStyler. Maybe use the DVDStyler that's included with DIKO 2.22 or later?

More research says that it's because the input image is the wrong resolution. See if you can change it from whatever it is (720x486?) to 720x480.