Inside Macintosh: QuickTime Components /

Chapter 8 - Video Digitizer Components / Video Digitizer Components Reference

Video Digitizer Component Functions / Selectively Displaying Video

VDSetMasterBlendLevel

The VDSetMasterBlendLevel function allows your application to set the blend level value for the input video signal. This value applies to the entire source video image.

pascal VideoDigitizerError VDSetMasterBlendLevel
                                  (VideoDigitizerComponent ci,
                                    unsigned short *blendLevel);

ci

Specifies the video digitizer component for the request. Applications obtain this reference from the Component Manager's OpenComponent function.

blendLevel

Contains a pointer to a field that specifies the new master blend level. Valid values range from 0 to 65,535, where 0 corresponds to no video
and 65,535 corresponds to all video. The digitizer component returns the new value in this field, so your application can avoid using unsupported values in future requests.

RESULT CODES

noErr	0	No error
digiUnimpErr	-2201	Function not supported

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