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CHAPTER 11 298
Producing Final Video
You may want to prepare variations of one program or clip for several uses. For example,
you may want to prepare low- and high- resolution versions of a program or clip, or create
versions for broadcast television, CD-ROM distribution, and Web viewing. You can automate
the export of project variations using batch processing. See “Processing a batch of projects”
on page 331.
Specifying compression for final video
You apply compression to final video so that a computer can play your program smoothly.
However, the level of compression you apply depends on how the final video will be
played back:
•
If you create a program that will be played from the Timeline while recording directly on
videotape, apply compression settings that preserve the highest picture quality without
dropping any frames. Tune the settings for the computer that will play the program during
videotape recording. If you will be recording to videotape using the same video card you used
for capturing video, you can use the same compressor you used for capturing.
•
If you create a program that will be played back from a wide range of computers, such as
from a retail CD-ROM title, apply compression settings that allow smooth playback on the
least powerful computer you plan to support.
Setting up a video codec
A compressor/decompressor, or codec , is a specific method of handling compression and
decompression. Some are built into QuickTime or Video for Windows, and others are available
as plug-in software modules. A wide range of codecs is available because there is no single codec
that is the best for all situations. For example, the best codec for compressing cartoon
animation is usually not very efficient for compressing live-action video.
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