Epiphan VGA2USB Pro - Manual (Page 43)

11. About Epiphan frame grabbing technology The video capture workstation
User Guide Page 43
• The Epiphan capture API
• V4L custom video capture applications
Figure 11:Linux video capture workstation software
The Epiphan USB device driver
The Linux Epiphan USB device driver receives images from an
Epiphan Frame Grabber and delivers the images to the Epiphan
capture API and to Video4Linux. Before delivering the images the
Epiphan USB device driver also performs image adjustment to
improve the quality of the image. Image adjustments include
setting the sampling phase, PLL adjustments, and Horizontal
shift. See “Configuring image adjustments” on page 136 for more
information about image adjustments.
The USB device driver can also change the color depth of the
captured image before sending the image to the video API. For
example, if the Frame Grabber is capturing the frames at a color
depth that is different than that required by the video capture
application, the USB device driver converts the images to the
required color depth.
Video Capture
Workstation
Display
Record
Images
Record
Video
Print
V4L-Compatible or Custom Video
Capture Application
Kernel mode
User mode
Epiphan
Capture API
Epiphan
USB Driver
Video4Linux