If the bar is coloured red towards the end, it may mean that the quality of your movie is degraded. The colored bar indicates the final output quality – the more green the better basically. By changing to High Quality or Professional, you may be able to fit a large movie onto a Single Layer disk. It seems that Best Performance takes up the most disk space, while High Quality and Professional Quality take up a few gigabytes less. Lower the encoding quality in iDVD – There are three rather confusing encoding settings in iDVD’s “Project Info” settings – Best Performance, High Quality and Professional Quality. in iDVDs advanced preferences, de-select the option “Burn at maximum speed” and select one of the lower ones (4x speed worked for me). I finally discovered that the problem is solved simply by burning at a slower speed. A Google search revealed that many other users had experienced the same problem but explanations varied from lack of hard disk space to dodgy DVDs. When you do finally come to the point where you burn your movie, iDVD will warn you how much disk space it needs to burn.īurn at a slow speed – After about 7 hours of rendering the project for burning, iDVD informed me that there had been a “Multiplexer Error” during formatting and the project was unable to burn. In addition, iDVD required another 15GB to burn the movie. If you’re burning your project as a gift like I was, make sure you find out whether the recipients DVD player can play DL discs.Ĭlear some hard drive space – To export a project such as mine to iDVD required around 15GB of free hard drive space to work. Check DVD Player compatibility – For some strange reason, many DVD players can’t even play DVD Double Layer disks and this includes new players too.