Notes about the DVDPROJ file extension:
Incorrect file associations could be the result of underlying issues within your PC system. As such it is highly recommended to scan your PC for invalid registry entries, unused processes and other unfavourable system settings to identify slowdown issues.
The DVDPROJ file type is primarily associated with 'iDVD' by Apple Inc.. DVD creation software portion of the Apple iLife software suite. Create a Hollywood-style disc with iDVD, using Apple-designed animated themes to give your DVD a distinct style from main screen to chapter selection. The project contains information necessary to create and burn the DVD.