User guide

Matrox Marvel – User Guide 41
Overlay and preview modes
The video capture program you’re using may give you a choice of overlay or preview modes.
If the
MJPEG video format is selected, overlay and preview settings have no effect. If an RGB
video format is selected, overlay and preview settings affect how video is viewed or
captured:
„ With overlay mode, everything on the video window is captured. For example, any part
of a dialog box overlapping the video window appears in the captured video.
„ With preview mode, you will get a lower frame rate (resulting in jerky video) and you
may not be able to view or capture video if there isn’t enough graphics memory
available. The amount of graphics memory available depends on how much memory is
on your graphics card, the size of the video window, and the resolution and color palette
settings of your display.