Inside Macintosh: QuickTime Components /

Chapter 5 - Sequence Grabber Components / Sequence Grabber Components Reference

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

SGCompressFrame

The SGCompressFrame function provides the default behavior for your compress function.

pascal ComponentResult SGCompressFrame (SGChannel c, 
                                       short bufferNum);

c

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

bufferNum

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

SPECIAL CONSIDERATIONS

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

RESULT CODES

cantDoThatInCurrentMode

-9402

Request invalid in current mode

Image Compression Manager errors

SEE ALSO

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

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