ViewCast Osprey-450e, Osprey-240e manual Reference Size

Setting Driver Properties

Reference Size	Displays the full uncropped size of the incoming video. This read-only
	information is determined by settings made on other tabs: the Input
	tab and the RefSize tab.
Granularity	This control helps you choose crop and output sizes that observe
	those restrictions
Enable Cropping	When enabled, your video is cropped to the indicated boundaries.
	When disabled, your video is not cropped regardless of any crop
	settings you may have made previously.
Default Output	Select the height and width of captured video.
Size
OK	Click OK to accept the settings.
Cancel	Click Cancel to reject the settings and close the window.
Apply	Click Apply to apply the settings.
Help	Click Help to access the user guide.

The default output size is the video size that appears in the DirectShow pin properties dialog as the default choice. It is a pathway for setting a custom or nonstandard video size in applications that do not have custom video sizing controls built into them.

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), and 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 truncate the right and bottom edges of the video.

54 ViewCast