User Guide

The Bit Budget 55
Media Capacities
Scenarist can output projects to a wide variety of media. The choice of media is driven by
the project’s purpose, length, and budget. Table 4 on page 56 lists the available media and
explains how to best use each type.
Refer to the Disc Size in Mbps column when calculating encoding bit rates. When
calculating how much data will fit on a DVD-ROM, refer to the Computer Disc Size column.
For hybrid DVDs, subtract the size of the ROM content (in bits) from the Disc Size, then use
the resulting value as the disc size in the bit-rate calculation.
Note: The Actual Disc Sizes are somewhat misleading in that they do not follow the
conventions used for other digital media. For DVDs, 1 GB is 1,000,000,000 (10
9
) bytes,
whereas for computers, 1 GB is 1,073,741,824 (2
30
) bytes. Therefore a 4.7 GB computer
hard drive contains about 330 MB more data than a 4.7 GB DVD.