ViewCast Osprey PCI, Руководство пользователя

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Setting Driver Properties
66 ViewCast
Pin Select
You can have different setups for the two pins. For example, you could enable cropping on the
capture pin but not on the preview pin.
Capture When you click Capture , the current crop settings for the capture pin
are loaded, and changes you make apply only to the capture pin, not
to the preview pin.
Preview The Preview button works analogously.
Both When you click Both , changes you make to the crop setup apply to
both the capture and preview pins. This setting is the default.
Reference Size
The reference size information is always read-only on this dialog tab. It is determined by settings
made on other tabs – specifically, the Input tab, where a 525-line or 625-line standard is selected,
and the RefSize tab, where Square Pixel or CCIR proportioning is selected. The read-only text box
describes which of these options is currently governing the reference size.
The reference width and height represent the full uncropped size of the incoming video. Your crop
settings are interpreted relative to this reference size. For example, if you are capturing 525-line
video, with a reference size of 640 x 480, and your crop rectangle is (0, 0, 640, 480), then your video
is effectively uncropped. But if you are capturing 625-line video, with a reference size of 768 x 576,
the same (0, 0, 640, 480) crop specification will truncate the right and bottom edges of the video.