CMediaSample.IsPreroll method
[The feature associated with this page, DirectShow, is a legacy feature. It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation. Those features have been optimized for Windows 10 and Windows 11. Microsoft strongly recommends that new code use MediaPlayer, IMFMediaEngine and Audio/Video Capture in Media Foundation instead of DirectShow, when possible. Microsoft suggests that existing code that uses the legacy APIs be rewritten to use the new APIs if possible.]
The IsPreroll method determines if this sample is a preroll sample. A preroll sample should not be displayed. This method implements the IMediaSample::IsPreroll method.
Syntax
HRESULT IsPreroll();
Parameters
This method has no parameters.
Return value
Returns S_OK if the sample is a preroll sample, and S_FALSE otherwise.
Remarks
The CMediaSample::m_dwFlags member variable specifies this property.
Requirements
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