IVMRDeinterlaceControl9::SetDeinterlaceMode method (vmr9.h)

Articolo
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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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 SetDeinterlaceMode method sets the deinterlacing mode for the specified video stream.

Syntax

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

Parameters

[in] dwStreamID

Index of the video stream to set. To set all streams, use the value 0xFFFFFFFF.

[in] lpDeinterlaceMode

Pointer to a GUID that specifies the deinterlacing mode. To turn off deinterlacing, use the value 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_OK	Success.
VFW_E_VMR_NOT_IN_MIXER_MODE	The VMR is not in mixer mode.

Remarks

If the application does not specify the mode, the VMR defaults to the first mode reported by the driver. In either case, if the VMR cannot use the preferred mode, it falls back to another mode as specified in the IVMRDeinterlaceControl9::SetDeinterlacePrefs method.

The SetDeinterlaceMode method is effective only for new connections made to the VMR. Some deinterlacing mode require that additional reference samples be available; the exact number depends on the mode. The VMR allocates surfaces for these additional samples. The client must set the deinterlace mode before the surfaces have been allocated. Surface allocation occurs after any of the following:

Pin connections, including dynamic reconnections
Dynamic format changes (the upstream filter calls IPin::ReceiveConnection to specify a new format)
Resolution changes
Monitor changes

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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