The measurements and the
graticules on the live image and generally the DirectX 9 technology are
not available with VfW devices. You need to use WDM devices.
Control dialogs for
VfW (Video for Windows) devices depend on the drivers supplied by the
digitizer board manufacturer and can therefore be different from the ones
shown here.
For the driver to function correctly you need:
minimum resolution: 1024x768;
color: 16 or 24 bits (32-bit color is not supported);
minimum memory: 16 MB.
In the Video Format dialog select 24 bit RGB.
If the VfW device lacks this
mode, it could be incompatible and therefore function incorrectly.
Some digitizer board manufacturers:
Compatible with VfW:
Hauppauge: Go or WinTV;
Pinnacle: miroVIDEO PCTV;
Incompatible with VfW:
AverMedia: EZ-Capture;
The manufacturer supplies only
the WDM driver to be used only with the WDM
Video Control mode.