IVMRDeinterlaceControl9::GetDeinterlaceMode method (vmr9.h)

發行項
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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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 GetDeinterlaceMode method retrieves the deinterlacing mode for the specified video stream.

Syntax

HRESULT GetDeinterlaceMode(
  [in]  DWORD  dwStreamID,
  [out] LPGUID lpDeinterlaceMode
);

Parameters

[in] dwStreamID

Index of the video stream to check.

[out] lpDeinterlaceMode

Pointer to a variable that receives a GUID. The GUID identifies the deinterlacing mode currently in use. If no deinterlacing mode was set, or the pin corresponding to the stream ID is not connected to an interlaced stream, the value is GUID_NULL.

Return value

Returns an HRESULT value. Possible values include the following:

Return code	Description
E_INVALIDARG	Invalid stream number.
E_POINTER	NULL pointer argument.
S_FALSE	No deinterlacing mode was set.
S_OK	Success.
VFW_E_VMR_NOT_IN_MIXER_MODE	The VMR is not in mixer mode.

Remarks

The VMR may not be able to use the requested mode, in which case it falls back to another deinterlace mode, as specified in the IVMRDeinterlaceControl9::SetDeinterlacePrefs method.

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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