User guide

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Rendering material to a Matrox VFW .avi file
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.
$ Chroma sampling for fast-motion video Select this option to help
eliminate artifacts such as jagged edges and unwanted lines at the edges of
fast-motion video (for PAL video only).
¡Important When rendering graphics and titles, make sure that Chroma
sampling for fast-motion video
is not selected, as this option can cause
jagged edges to appear in your rendered images.
4 Click OK to save your settings. Any change you make to your selected
luminance range setting (such as switching from
Standard to Expanded)
will only take effect the next time you start your VFW program.
Rendering material to a Matrox VFW .avi file
When you render material to an .avi file, such as when you render a finished
video production or an animation, you must select the compressor (codec) you
want to create the file. The compressor determines the quality of your rendered
video. Refer to your program’s documentation for instructions on how to select a
compressor for your .avi file.
To create a Matrox Video for Windows .avi file, select the
Matrox DV/DVCAM
codec from your program’s list of available compressors.
¦NoteIf you installed the Matrox VFW codecs on a system without the Matrox
RT.X100 Xtreme hardware, additional Matrox codecs will be available, such as
the Matrox DVCPRO and Matrox MPEG-2 I-frame codecs. These codecs can be
used to create clips for other Matrox systems, such as DigiSuite or RT2500.
Matrox RT.X100 Xtreme supports DV/DVCAM clips only.