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IAMTimelineObj::FixTimes

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Microsoft DirectShow 9.0

IAMTimelineObj::FixTimes

The FixTimes method rounds the specified start and stop times to the nearest frame boundaries, as defined by the parent group's frame rate setting.

Syntax

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

Parameters

pStart

Pointer to a variable that contains the start time, in 100-nanosecond units. If the call succeeds, this variable is set to the rounded time.

pStop

Pointer to a variable that contains the stop time, in 100-nanosecond units. If the call succeeds, this variable is set to the rounded time.

Return Value

Returns S_OK if successful, or E_NOTINTREE if the object is not part of a group.

Remarks

During rendering, DES rounds the 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, see Time in DirectShow Editing Services.

Use this method to determine accurate start and stop times in the rendered project. For example, you should seek to the rounded times, rather than the object's original start and stop times. Call IAMTimelineObj::GetStartStop to obtain the original times, and pass those values to FixTimes.

Requirements

Header: Include Qedit.h. This header file is not compatible with Microsoft® Direct3D® headers later than version 7.

Library: Use strmiids.lib.

See Also