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Epiphan Systems Inc.


Configuring VGA modes

For a description of VGA modes that also describes many of the terms used in this section, see VGA modes.

If you are capturing images from a VGA stream, from the Capture menu of the video capture application you can select Configure Device and then select the VGA modes tab to configure the VGA modes that the Frame Grabber can operate in. You can also configure VGA modes from the VGA2USB control panel application.

In most cases you should not have to configure VGA modes. Usually the Frame Grabber and VGA source can automatically select a VGA mode.

However, configuring VGA modes can be useful if you have special requirements or if the VGA source and Frame Grabber do not automatically select the VGA mode that you want. To resolve problems like this you can configure VGA modes to either limit the standard VGA modes that the Frame Grabber can operate in or you can add one or more custom VGA modes and configure the Frame Grabber to operate in a custom VGA mode.

Figure 43: Configuring VGA Modes

The Frame Grabber acts like a display device. Many VGA sources set the VGA mode that they use by checking the VGA modes the display device can use and then setting their VGA output mode to match. So if you can control the VGA mode that the Frame Grabber uses you may be able to control the VGA mode that the VGA source uses.

If the Frame Grabber and the VGA source cannot automatically select the VGA mode that you want them to use, you may be able to resolve this by only allowing the Frame Grabber to operate in one or some standard VGA modes.

If the VGA source operates in a non-standard VGA mode, you can use the custom VGA mode settings to add that non-standard mode to your Frame Grabber. The Frame Grabber can then operate in that mode.


Epiphan Systems Inc.
Frame Grabber User Guide, 1 February 2009
www.Epiphan.com
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