Matrox M.Key/100, User Manual

Page: 15 / 22

7
Using Matrox M.Key/100 with VFW programs
5
In the provided dialog box under Color Space Conversion , select the
options you want:
¦ Note If an option isn’t supported by the particular codec(s) you are
configuring, that option will not be available. Most options, however, are
common to all the Matrox Video for Windows codecs. When these options are
set for a particular codec, they are also set for the other codecs that support
those options.
$
Standard Renders video using standard broadcast luminance levels.
Super black and super white luminance levels are clipped.
$
DV-compliant
Renders video using luminance levels appropriate for DV
material. This ensures that the super white luminance levels of your video
are retained.
$
Expanded Renders video using the full range of luminance levels. Super
black and super white luminance levels are retained. You may want to use
this setting, for example, to render material on which you’ll be applying
luminance key effects.
¡ Important When rendering RGB graphics, selecting
Expanded
or
DV-compliant
will create super black and/or white in your rendered images.
For example, if you select
Expanded
, all black in your RGB graphics will
become super black, and white will become super white. To render your
RGB graphics with standard black and white levels, set your luminance
range to
Standard
.
$
Chroma filtering and Chroma interpolation Select these options to
adjust the chroma bandwidth of RGB graphics. This improves images that
have abrupt changes between different colors, such as a blue box on a black
or white background. You should select these options for most animation
and compositing work (computer-generated material). For most video
editing programs, however, it’s best that you
not select these options. If you
find that your rendered images appear to be blurred, try clearing one or both
of these options.