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12. Windows video capture application Windows Epiphan USB device driver
Page 76 Epiphan Frame Grabber
However, in some cases you may choose to reduce the quality of
the captured image for a number of reasons such as reducing file
size, or a custom application that uses a different color depth.
In most cases image capture and recording performance should
be acceptable if the video capture workstation meets or exceeds
the hardware requirements described in “Hardware
Requirements” on page 11 and if there are not a lot of concurrent
demands on this PC.
Converting color images to grayscale or black and white
If the Frame Grabber is capturing color RGB images and you set
the display format to a grayscale or black and white format, the
video capture application converts the color images to the
requested grayscale or black and white format. Conversion from
color to grayscale or black and white causes the greatest demand
on the video capture workstation CPU because the conversion is
performed by the video capture application. If you are capturing
color images, you should only set the display format to grayscale
or black and white if you have a specific need for this color depth.
If you have concerns about performance, you can make some trial
recordings to ensure the video capture workstation has sufficient
CPU and memory resources.
Windows Epiphan USB device driver
On Windows video capture workstations the Epiphan USB device
driver installs a VGA2USB control panel application ( Figure 17 ).
You can use this control panel application to view the status of
the Frame Grabber or Frame Grabbers connected to the video
capture workstation. You can also select Configure Device to
configure the following settings for each Frame Grabber that you
have connected to the video capture workstation:
• Image adjustments, see
“Configuring image adjustments” on
page 136
• How the Epiphan USB device driver communicates with
DirectShow, see “Configuring DirectShow options” on
page 143