ViewCast Osprey PCI, User Manual

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Setting Driver Properties
30 ViewCast
The RefSize tab has the following controls.
Horizontal
Format Set the horizontal mode for the output. Options include Square
Pixels, CCIR-601 setting, 16:9 Wide, and Use WideScreen Signal
control.
Horizontal Delay The horizontal delay control moves the video horizontally in the
capture or preview frame.
Source Width Use the Source Width control can be used to trim the black left and
right edges of an image.
Reference Size for
Crop and Logo
Placement This part of the dialog box displays the results of more fundamental
settings made elsewhere in the dialog box.
525-Line (NTSC)
Vertical Format This control is for NTSC users. It has no effect for PAL and SECAM
625-line video standards.
Horizontal Format
Figure 19. Horizontal Format
Square Pixels - This setting is for normal 4:3 video that will be viewed via a computer monitor. This
setting results in a square aspect ratio sampling of the source video and a source image of 640 x 480
for 525-line standards and 768 x 576 for 625-line standards.
CCIR-601 – This setting is for 4:3 video that will be viewed on a dedicated video monitor. This setting
results in a CCIR-601 aspect ratio sampling of the source video. It results in a video input horizontal
size of 720 pixels for both 525-line and 625-line standards. This sizing is standard for dedicated
monitors but results in video that appears horizontally stretched (525-line) or squeezed (625-line)
on a computer monitor.
It is more efficient to set the horizontal mode to match the size of the output. For example, if your
target video size is 640 x 480, using Square Pixel sizing in PostProcessing Mode will avoid any
unnecessary software scaling step in the driver.