The Begin method prepares to extract and decompress copies of frames from a stream. Called when an application uses the AVIStreamGetFrameOpen function.
HRESULT Begin( LONG lStart, LONG lEnd, LONG lRate );
Starting frame for extracting and decompressing.
Ending frame for extracting and decompressing.
Speed at which the file is read relative to its normal playback rate. Normal speed is 1000. Larger values indicate faster speeds; smaller values indicate slower speeds.
Returns the HRESULT defined by OLE.
For handlers written in C++, Begin has the following syntax:
HRESULT Begin(LONG lStart, LONG lEnd, LONG lRate);
|Minimum supported client||Windows 2000 Professional [desktop apps only]|
|Minimum supported server||Windows 2000 Server [desktop apps only]|