User guide

Using Matrox M.Key/100 with VFW programs

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).

¡ Importan t 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.

6 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.

¦NoteWhen specifying your Export Movie settings in Adobe Premiere Pro,

you must set the

File Type to Microsoft AVI on the General page, then select

the compressor you want on the

Video page.

°To create a Matrox VFW .avi file:

1 Select one of the following codecs from your program’s list of available

compressors:

$ Matrox DV/DVCAM Renders video to DV or DVCAM format.

$ Matrox DVCPRO Renders video to DVCPRO format.

$ Matrox DVCPRO50 Renders video to DVCPRO50 or D-9 format.

$ Matrox DVCPRO HD Renders video to DVCPRO HD format (for 1080i

and 720p video only).

$ Matrox MPEG-2 I-frame Renders video to MPEG-2 intra-frame format

using the 4:2:2 Profile @ Main Level at a selected data rate (SD resolution

only).