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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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

See also

CPosPassThru Class