|Microsoft DirectX 9.0|
The SetSyncPoint method specifies whether the beginning of this sample is a synchronization point.
HRESULT SetSyncPoint( BOOL bIsSyncPoint );
[in] Boolean value that specifies whether this is a synchronization point. If TRUE, this is a synchronization point.
Returns S_OK or an HRESULT value indicating the cause of the error.
The filter that first generates the data in the sample should set this flag to TRUE or FALSE, as appropriate. For uncompressed video and PCM audio, set every sample to TRUE. For compressed video, set key frames to TRUE and delta frames to FALSE.
This flag is purely informational. Other filters downstream might check this flag; for example, a filter might need to skip to the next key frame.