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DVD Storage Capacity

Unless you plan to include computer files on your DVD, as we'll discuss in Chapter 20, “Creating DVDs with iDVD,” the best way to think of DVD storage capacity with iDVD is in terms of how many minutes of video you can fit on the disc. The amount of video you can fit on a disc is determined by how much the video is compressed. Because iDVD does the encoding automatically, the limit is about 90 minutes of video on the disc.

If you're talking about the disc in terms of bytes and megabytes, however, you might be familiar with the often-quoted measurement of 4.7 gigabytes (GB)—that is, the claim that you can store up to 4.7 gigabytes of data on a single-layer DVD disc.


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