IVMRDeinterlaceControl9::GetDeinterlacePrefs method (vmr9.h)

Artikel
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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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 GetDeinterlacePrefs method queries how the VMR will select a deinterlacing mode if it cannot use the preferred deinterlacing mode.

Syntax

HRESULT GetDeinterlacePrefs(
  [in] LPDWORD lpdwDeinterlacePrefs
);

Parameters

[in] lpdwDeinterlacePrefs

Pointer to a variable that receives a member of the VMR9DeinterlacePrefs enumeration.

Return value

Returns an HRESULT value. Possible values include the following:

Return code	Description
E_POINTER	NULL pointer argument.
S_OK	Success.
VFW_E_VMR_NOT_IN_MIXER_MODE	The VMR is not in mixer mode.

Remarks

By default, the preferred deinterlacing mode is the first mode reported by the driver. The application can set the preferred mode by calling the IVMRDeinterlaceControl9::SetDeinterlaceMode method. If the VMR cannot use the preferred mode, it will fall back to another mode as specified by the dwDeinterlacePrefs parameter.

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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