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Osprey-300 User’s Guide
For Preview, the driver exploits the hardware-
based deinterlacing capability that resides in
most display adapters. No CPU bandwidth is
used; however, our experience so far is that the
quality of the deinterlacing is not quite as high
as that offered by the software-based capture
pin method. When Preview Pin deinterlace is
enabled, the only video color formats available
for preview are YUY2 and RGB8 greyscale, since
hardware deinterlace only works only for YUY2.
The deinterlace controls have no effect when
captured video is from a single field only. Video
is captured only from a single field if the capture
height before cropping is less than or equal to
the field height.
For more information about interlacing and
deinterlacing, refer to De-Interlacing in the Video
Driver Topics chapter.
Transfer Mode
This control affects capture of video from a
digital camera, routed typically through the
Osprey card’s DV input. In normal video,
including many digital cameras, field 1 containing
lines 1, 3, 5… of the video is transmitted in its
entirety followed by field 2 containing lines 2, 4,
6…. The capture card interleaves the two fields
together, and the Interleaved setting should be
used. A digital camera, however, may transfer
data in progressive mode, meaning that the data
is transferred as a single field of lines 1, 2, 3, 4,
5…. You will know that you need to use the Odd/
Even setting if the video displays as two separate
compressed fields, one on top of the other.
Horizontal Delay
This control adjusts the left-right position of the
image. The horizontal delay from horizontal sync
to start of video is different from the standard
for some input devices. If this is a problem you
may see a vertical black line at the left or right
edge of the video.
Summary of Contents for Osprey-300
Page 1: ...Osprey 300 User s Guide...
