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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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

Note

[Deprecated. This API may be removed from future releases of Windows.]

 

The GetStartStop method retrieves the object's start and stop times, relative to the object's parent.

Syntax

HRESULT GetStartStop(
   REFERENCE_TIME *pStart,
   REFERENCE_TIME *pStop
);

Parameters

pStart

Receives the start time, in 100-nanosecond units.

pStop

Receives the stop time, in 100-nanosecond units.

Return value

If this method succeeds, it returns S_OK. Otherwise, it returns an HRESULT error code.

Remarks

Compositions, groups, and tracks always have a start time of 0.

During rendering, DES rounds an object's start and stop times to the nearest frame boundary. However, DES does not overwrite the object's times. If you change the group frame rate, the rounded times are always calculated from the original times. For more information, Time in DirectShow Editing Services.

To determine the start and stop times in the rendered project, pass the values returned by GetStartStop to the IAMTimelineObj::FixTimes method.

Note

The header file Qedit.h is not compatible with Direct3D headers later than version 7.

 

Note

To obtain Qedit.h, download the Microsoft Windows SDK Update for Windows Vista and .NET Framework 3.0. Qedit.h is not available in the Microsoft Windows SDK for Windows 7 and .NET Framework 3.5 Service Pack 1.

 

Requirements

Requirement	Value
Header	Qedit.h
Library	Strmiids.lib

See also

IAMTimelineObj Interface

Error and Success Codes