Here are some tips if you are having difficulty burning a DVD in iDVD. If you are having difficulty playing back a burned DVD, see this article instead. Also see "Factors that affect writing to or reading from optical media" for more information.Note: To avoid using multiple DVD discs during testing, consider using DVD rewriteable discs that can be erased and reused. If you are using iDVD 5 or higher, you can also burn to a disk image instead and use this to test and isolate in some cases (see step 10 below for example).