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Sets the preroll property. If TRUE, this sample is for preroll only and should not be displayed.
HRESULT SetPreroll( BOOL bIsPreroll );
Parameters
- bIsPreroll
- Set to TRUE to specify the media sample as a preroll sample;
otherwise, set to FALSE.
Return Values
Returns an HRESULTvalue that depends on the implementation. HRESULTcan be one of the following standard constants, or other values not listed.
E_FAIL Failure. E_POINTER Null pointer argument. E_INVALIDARG Invalid argument. E_NOTIMPL Method isn't supported. S_OK or NOERROR Success. Remarks
Preroll samples are samples that are processed but not displayed, and are located in the media stream before the displayable samples.
While calling SetPrerollwith a value of TRUE (1) sets the preroll property, calling IsPrerollon a preroll sample returns S_OK (0).