Hauppauge WinTV USB - Manual (Page 17)

Still Frame Image Capture mode
With WinTV-32, you can switch into the high quality image capture mode by
clicking on the Still Frame Image Capture Mode button on the toolbar.
When you click on this button, you will see the Image Capture Toolbar.
Click on the Configure icon in the Image Capture Toolbar to set the image
capture resolution and to configure for either still or motion video images.
In WinTV2000, to configure still image capture, click on the CFG button
(found just above the Snapshot Viewer window).
You can capture images up to 1600x1200 pixels.
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WinTV-USB
Installation and Reference Manual