SGGetVideoDigitizerComponent(IM: QC)

Inside Macintosh: QuickTime Components /

Chapter 5 - Sequence Grabber Components / Sequence Grabber Components Reference

Sequence Grabber Component Functions / Working With Video Channels

SGGetVideoDigitizerComponent
The SGGetVideoDigitizerComponent function allows you to determine the video digitizer component that is providing source video to a video channel component. You can use this function to obtain access to the video digitizer component so that you can set its parameters, if you so desire. See the chapter "Video Digitizer Components" in this book for information about video digitizer components.
pascal ComponentInstance SGGetVideoDigitizerComponent 
                                                   (SGChannel c);
c
Specifies the reference that identifies the channel for this operation. You obtain this reference from the SGNewChannel function, described on page 5-29.

DESCRIPTION
The SGGetVideoDigitizerComponent function returns a component instance that identifies the connection between the video channel component and its video digitizer component. If the video channel component does not use a video digitizer component, this returned value is set to nil.

SPECIAL CONSIDERATIONS
If you change any video digitizer component parameters, be sure to notify the sequence grabber component by calling the SGVideoDigitizerChanged function, which is described in the next section. In addition, you should not change any video digitizer component parameters during a record operation.