What computer operating system is involved? What video card/graphics card does your computer use? And, one or two video cards/graphics cards?
Do you have the latest version of QuickTime 7 installed on your computer with 13? Have you updated 13 to 13.1, using an opened project's Help Menu/Updates?
Are you running the program as administrator (from user account with administrative privileges)?
Please do the burn to disc and burn to ISO Image with and without the following preference disabled....
"Use Hardware Acceleration (works on Intel HD Graphics 2000 and higher)".
This preference is found in Edit Menu/Preferences/General.
Does that resolve the issues?
Let us start here and then decide what next based on the details in your reply. Any questions or need clarification on the above, please do not hesitate to ask.
Thanks a lot you saved my project (Peru, Ecuador and Galapagos). The Error was, that I didn't have QuickTime 7 installed. The DVD was burnt without Hardware Acceleration.
Wonderful news. That you for letting us know the outcome. Great job to gain your success.
Best wishes. We appreciated the opportunity to be of assistance.