IVMRFilterConfig9::SetImageCompositor method (vmr9.h)

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4/26/2023

[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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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 SetImageCompositor method installs an application-provided image compositor object.

Syntax

HRESULT SetImageCompositor(
  [in] IVMRImageCompositor9 *lpVMRImgCompositor
);

Parameters

[in] lpVMRImgCompositor

Pointer to the image compositor object provided by the application.

Return value

The method returns an HRESULT. Possible values include those in the following table.

Return code	Description
E_FAIL	Cannot change the compositor when the VMR filter's pins are connected.
E_POINTER	NULL pointer.
S_OK	The method succeeded.
VFW_E_WRONG_STATE	The VMR is not in mixing mode.

Remarks

Use this method to replace the VMR's default compositor with a custom compositor provided by the application. The image compositor is a sub-component of the mixer. The mixer must be loaded, through a call to IVMRFilterConfig9::SetNumberOfStreams,

before the compositor can be specified. The VMR manages all reference counting on the IVMRImageCompositor9 interface.

Requirements

Requirement	Value
Minimum supported client	Windows XP with SP2 [desktop apps only]
Minimum supported server	Windows Server 2003 R2 [desktop apps only]
Target Platform	Windows
Header	vmr9.h
Library	Strmiids.lib

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