CPosPassThru.GetPreroll 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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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 GetPreroll method retrieves the amount of data that will be queued before the start position. This method implements the IMediaSeeking::GetPreroll method.
Syntax
HRESULT GetPreroll(
LONGLONG *pllPreroll
);
Parameters
-
pllPreroll
-
Pointer to a variable that receives the preroll time, in units of the current time format.
Return value
Returns the HRESULT value from the connected pin.
Requirements
| Requirement | Value |
|---|---|
| Header |
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| Library |
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