Inside Macintosh: QuickTime Components /

Chapter 5 - Sequence Grabber Components / Sequence Grabber Components Reference

Sequence Grabber Component Functions / Utility Functions for Video Channel Callback Functions

SGGrabFrame

The SGGrabFrame function provides the default behavior for your grab function.

pascal ComponentResult SGGrabFrame (SGChannel c, short bufferNum);

c

Specifies the reference that identifies the channel for this operation. The sequence grabber component provides this value to your grab function.

bufferNum

Identifies the buffer. The sequence grabber component provides this value to your grab function.

SPECIAL CONSIDERATIONS

You should call the SGGrabFrame function only from your grab function. If you call it at any other time, results are unpredictable.

SEE ALSO

See "Application-Defined Functions," which begins on page 5-107, for information about grab-complete functions.

RESULT CODE

cantDoThatInCurrentMode

-9402

Request invalid in current mode

Main | Top of Section | What's New | Apple Computer, Inc. | Find It | Feedback | Help