IAMTimeline::CreateEmptyNode 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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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 CreateEmptyNode method creates a new timeline object.

Use this method to create timeline objects, rather than the CoCreateInstance function, because this method performs important initialization routines. Every object created by this method supports at least the IAMTimelineObj interface, along with other interfaces specific to that type of object.

Syntax

HRESULT CreateEmptyNode(
  [out] IAMTimelineObj      **ppObj,
        TIMELINE_MAJOR_TYPE Type
);

Parameters

ppObj [out]

Receives a pointer to the new object's IAMTimelineObj interface.

Type

Member of the TIMELINE_MAJOR_TYPE enumerated type, specifying the type of object to create.

Return value

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

Remarks

Do not add the new object to another timeline instance. Every object in a timeline must be created by that timeline.

If the method succeeds, the IAMTimelineObj interface that it returns has an outstanding reference count. Be sure to release the interface when you are finished using it.

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

IAMTimeline Interface

Error and Success Codes