We often use DVD to store video and data file. Varieties of DVDs are sorted by the way data stored.
DVD-9 holds 8.5GB and is supported by the DVD+R and DVD-R formats. It is also known as Single-Sided Double Layer (sometimes called Dual Layer). The official names are DVD-R DL and DVD+R DL.
DVD-5 holds 4.7GB and is supported by the DVD+R/RW and DVD-R/RW formats. It is also known as Single-Sided Single Layer.
If you want to compress Double Layer DVD-9 to Single Layer DVD-5 on Mac, you must use one Mac DVD Copy software. Download this Mac DVD Copy to have a try;
Buy NowFree trial(Intel PPC)How to compress DVD-9 to DVD-5 for Mac
Insert your DVD and select the copy DVD mode
Select souce: Choose DVD-video disc from the source pop up menu.
Select target: From the “Target” pop up menu, select the DVD disc, and on the type of DVD disc, please select the disc type “D5(4.7GB)”(there are three types of DVD discs: D5(4.7GB) Disc, D9(8.5GB) Disc and customized disc.)
Start to compress DVD:Click “Start Copy” button to begin your DVD compressing.
learn more on: how to edit DVD file with DVD Copy for Mac.
