Ulead PYRO1394DV User Manual page 55

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Advanced
In this tab, you can specify the data rate of your
video file by targeting a specific medium for play
back. Data rate is calculated in kilobytes per
second (Kb/Sec) of data that needs to move from
your source (disk drive, CD-ROM, modem, etc.)
through your computer. If you have a Target
playback device in mind right now, select it from
the list. You can set the Tolerance to let the data
vary a little, otherwise Ulead VideoStudio will stop
and warn you if the data rate is too high. It may
Video Save Options: Advanced.
well be impossible to compress 640x480 30fps
video down to a data rate of 150Kb/Sec, but this
depends on your video (e.g. whether it has a lot of
action) and how much quality you feel you can
sacrifice.
Compression
This is where you choose the codec, or type of
compression software, you'll use to create your
video. All digital video is compressed in some way,
and the video clips you captured to your computer
are already using some kind of codec. To maintain
the highest possible quality and keep render times to
a minimum, it is best to use the same codec to
capture your video and to create your final movie.
This information can be found by clicking the
Storyboard step, selecting a captured clip, and
clicking the Info button. Some video capture cards
record "uncompressed" video, in which case you
should select None as the compression type (this,
Video Save Options: Compression.
however, will create a very large file).
Many codecs allow you to select the Quality of the output as a percentage. In some, you can
set the Keyframe for every X frames; for now the default for the codec should be adequate,
but lower numbers mean longer render times and higher quality. The Data type is usually set
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