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Osprey-300 User’s Guide
Currently, the driver’s internal defaults are as
follows:
CaptureMap
71+ 81+ B1+ C1+ 41+ 21+ 11+ 61+ 41- 21- 11- 61-
PreviewMap1
71+ 41+ 11+ 61+ 41- 11- 61-
PreviewMap2
72+ 41+ 61+
When you have added or changed these variable,
to force the driver to reread them either (1) restart
the system; or (2) on the driver’s RefSize property
page, toggle the NTSC or CCIR controls.
Here are two applications of CaptureMap,
PreviewMap1, and NVideoCapBuffers:
1. On a particular server with a built-in display
adapter, YUY2 preview video connects
to the renderer, but displays as black
rather than video. RGB15 does, however,
work. Since most applications will try
to use YUY2 if available, whether or or
not it is fi rst on the list, the solution is to
remove YUY2 entirely from PreviewMap1.
The string used is “41+ 61+ 41- 61- “.
2. To make YUY2 VIDEO2 available on the
capture pin, set CaptureMap to “72+ 81+
B1+ C1+ 41+ 21+ 11+ 61+ 41- 21- 11- 61-
“ (that is, change the initial 71+ to 72+).
Most display adapters will deinterlace video
sent to the renderer in this format. To get
decent rendering performance and to get
deinterlacing to occur, you will probably
fi nd that you have to add the following
DWORD variable to the registry in the
same place as the CaptureMap variable:
• NVideoCapBuffers = 4
The driver’s internal default is 50, which is
appropriate for capture but in our experience does
not work well for rendering. Note that the “HW
Deinterlace Preview” control is not applicable to
rendering on the capture pin - only on the preview
pin. The display adapter will deinterlace if VIDEO2
is exposed (or if both VIDEO and VIDEO2 are
exposed).
DX9
This variable is meaningful only on Windows 2000
systems, not on XP. On Windows 2000 the audio
section of the driver will not work correctly unless
DirectX 9.0 or later has been installed. This
DWORD variable tells the driver whether or not
DirectX 9.0 is present. It must be set manually by
the user. If it is either not present or is set to zero,
then the audio device will not be enabled. The
audio device will be enabled if DX9 is set to any
non-zero value.
The four DWORD variables listed below define the
default values for the Brightness, Hue, Contrast,
and Saturation adjustments. They are what these
controls are set to when you click the Default
button on the driver’s “Video Proc Amp” property
page. The driver’s internal defaults in decimal
format are as follows:
DefaultBrightness: 0
DefaultHue:
0
DefaultContrast: 216
DefaultSatU:
254
DefaultBrightness and DefaultHue are both signed
values with range –128 to +127. To set a registry
override that is a positive value, 0 to 127, set the
DefaultBrightness or DefaultHue DWORD directly
to that value. To set a negative value the signed
value must be converted to its equivalent unsigned
DWORD representation. For example, –128 is
hexadecimal 0xFFFFFF80 in the registry, and –1
is 0xFFFFFFFE. Note that the Video Proc Amp
property page will convert the –128 to +127 range
to 0 to 511 – so that 0, in the driver’s and registry’s
representation, will show as 156.
DefaultContrast and DefaultSatU are both unsigned
values with range 0 to 511, so the registry number
always directly represents that value.
Summary of Contents for Osprey-300
Page 1: ...Osprey 300 User s Guide...
