Inside Macintosh: QuickTime Components /

Chapter 8 - Video Digitizer Components / Video Digitizer Components Reference

Video Digitizer Component Functions / Setting Source Characteristics

VDGetVBlankRect

The VDGetVBlankRect function returns the vertical blanking rectangle.

pascal VideoDigitizerError VDGetVBlankRect
                                  (VideoDigitizerComponent ci,
                                    short inputStd, 
                                    Rect *vBlankRect);

ci

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

inputStd

Specifies a short integer for the signaling standard used in the source video signal. Valid values are

ntscIn

Input video signal to digitize is in NTSC format

palIn

Input video signal to digitize is in PAL format

secamIn

Input video signal to digitize is in SECAM format

vBlankRect

Contains a pointer to a rectangle that is to receive the size and location information for the vertical blanking rectangle.

DESCRIPTION

The vertical blanking rectangle defines the vertical blanking area in the input video signal, and it corresponds to lines 10 through 19 of the incoming video signal. The video digitizer component returns spatial information that is relative to the maximum source rectangle. For a complete discussion of the relationship between these rectangles, see "About Video Digitizer Components," which begins on page 8-3.

All video digitizer components must support this function.

RESULT CODES

noErr	0	No error
qtParamErr	-2202	Invalid parameter value

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