Using the Video Capture Driver in Windows NT
If you use the Video Capture driver in Windows NT 4.0, consider the
following:
Windows NT color depth changes affect the captured data
(preview, overlay). Close the video capture application before
changing color depth, and then restart the application.
As a client of the ThinkPad Power Management Port driver, the
Video Capture driver has power management support. You must
first have installed the ThinkPad Configuration program, however.
Otherwise, the driver will not function properly when the
hardware changes power states. If the captured image does not
appear properly, restart the capture application.
Before running a capture application that uses this driver, close
any application the uses the IBM MPEG-2 driver (for example,
Media Player). Also if a capture application is running, do not
attempt to start an application that uses the IBM MPEG-2 driver,
or any other application that uses the capture driver.
For preview mode, you can select image dimensions based on
the available space in video memory. For overlay mode, you
can choose from all sizes (40
×
30 to 640
×
480). Note the
following when you use the VIDECAP32.EXE Video Capture
application.
– Size the capture display window and set a capture format so
that the scrollbars are visible. Set the scrollbars to any
position other than the top on the vertical scrollbar and left
on the horizontal. Then resize the display window or change
the capture format so that scrollbars are no longer visible.
The captured image now appears split either vertically or
horizontally, because
VIDCAP32.EXE
continues to inform the
driver about the scrollbar settings, even though the scrollbars
are no longer visible. To fix this, resize the display window
or change the capture form so that the scrollbars are visible
again, and then reset the scrollbars.
– Select a size for overlay greater than the maximum
supported for preview. The driver displays a dialog box
informing you that the size selected should not be used for
preview. If you change to preview mode with the same size,
the image displayed could be distorted, and the cursor might
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IBM ThinkPad 770E/770ED User's Guide Supplement
