User guide

40 Matrox Marvel – User Guide
Output to TV – Enable this check box if you want your video source to appear full-screen on
a TV connected to your Matrox graphics card. This feature can only take effect if no other
DualHead feature (see page 22) is being used.
Video format settings
RGB – Click an RGB button to select an uncompressed video
file format. Use an RGB format to video conference and to
capture still images. The bit values represent how many bits
of information are used for color palette information; the
larger the bit value, the more colors can be used, but the larger
the file size.
8-bit – 256 shades of gray
16-bit – 65,536 colors
24-bit – 16,777,216 colors
MJPEG – For more information, see “Capture options”, page 35.
Set Video Size – Click this button to adjust the
video image size (resolution) settings for the
currently selected format (RGB or MJPEG).
For MJPEG, you can also select its quality
setting.
Also, with MJPEG you can compare the speed
of your hard disks (
HD Benchmark results
box) with the speed required by the selected
settings (
Data rate box). (The data rate
estimate
doesn’t take audio into account.) If
the hard disk you’re using is too slow, video
files you capture may appear jerky.