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Video Save Options: Compression -
examples using different codecs
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 Clip properties button. Some
video capture cards record “uncompressed”
video, in which case you should select None
as the compression type (this, 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 by default, and again,
should match your captured clips. Audio
compression can also be set, independent of
the video compression. Data rates are listed,
so you can easily see the impact on your
completed movie. There is no point in
choosing a higher quality audio setting than
your original source audio files. And, like
video, selecting the same audio compression
as used in your highest quality audio clip
(usually music) is your best option.
MPEG-1 file for VCD
A VCD is simply a special version of a CD-ROM. The exciting thing about this format is that
it can be read by CD-ROMs, VCD players, or even DVD players.
The format used on a VCD is MPEG-1. The previous section explains how you can put a video
file on a CD to play back on a computer. This file can be just about any format: AVI, MPEG-1,
MPEG-2, etc. When you want to create a VCD file, however, you need to create a special
WhiteBook standard MPEG-1 file that has very technical specifications. Fortunately, creating
such a file is easy with Ulead VideoStudio.