|Microsoft DirectX 9.0|
The OverrideKeyFrame method instructs the filter to compress a particular frame as a key frame.
HRESULT OverrideKeyFrame( long FrameNumber );
[in] Specifies the frame number. The first frame that the filter delivers is numbered zero.
Returns an HRESULT value. Possible values include the following.
If the filter supports this method, you can use it to override the normal key-frame distribution for a particular frame. After the filter creates a key frame, it might reset its count to determine when the next key frame should occur. For example, if the key-frame rate is 10, and an application uses this method to force frame 5 as a key frame, the filter might wait another 10 frames (until frame 15) before it creates the next key frame.