IWMEncProfile2::get_InterlaceMode

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The get_InterlaceMode method retrieves a Boolean value indicating whether the video output will be interlaced.

Syntax

HRESULT get_InterlaceMode(
  short  iRenderSiteIndex,
  VARIANT_BOOL*  pfInterlaceMode
);

Parameters

iRenderSiteIndex

[in]  short containing the audience stream index. Because an audience can contain only one stream of each type, iRenderSiteIndex must be 0.

pfInterlaceMode

[out]  Pointer to a VARIANT_BOOL that indicates whether the output will be interlaced.

Return Values

If the method succeeds, it returns S_OK. If it fails, it supports the IErrorInfo interface and returns an HRESULT error code.

Return code Number Description
E_POINTER 0x80004003 The pointer to the Boolean is NULL.

Example Code

// Include libraries.
#include <windows.h>
#include <atlbase.h>
#include <comdef.h>
#include "C:\WMSDK\WMEncSDK9\include\wmencode.h"

    // Declare variables.
    HRESULT hr;
    IWMEncoder* pEncoder;
    IWMEncProfileCollection* pProColl;
    IWMEncProfile* pPro;

    IWMEncProfile2* pPro2;

    // Initialize the COM library and retrieve a pointer to an IWMEncoder interface.
    hr = CoInitialize(NULL);
    if ( SUCCEEDED( hr ) )
    {
        hr = CoCreateInstance(CLSID_WMEncoder,
            NULL,
            CLSCTX_INPROC_SERVER,
            IID_IWMEncoder,
            (void**) &pEncoder);
    }

    // Retrieve a specific profile.
    if ( SUCCEEDED( hr ) )
    {
        hr = pEncoder->get_ProfileCollection(&pProColl);
    }
    if ( SUCCEEDED( hr ) )
    {
        hr = pProColl->Item(11, &pPro);
    }

    if ( SUCCEEDED( hr ) )
    {
        hr = CoCreateInstance(CLSID_WMEncProfile2,
            NULL,
            CLSCTX_INPROC_SERVER,
            IID_IWMEncProfile2,
            (void**) &pPro2);
    }

    if ( SUCCEEDED( hr ) )
    {
        hr = pPro2->LoadFromIWMProfile(pPro);
    }

    // Determine whether interlaced processing is allowed.
    VARIANT_BOOL bIntMode;
    if ( SUCCEEDED( hr ) )
    {
        hr = pPro2->get_InterlaceMode(0, &bIntMode);
    }

    // Set interlace mode.
    if ( SUCCEEDED( hr ) )
    {
        hr = pPro2->put_InterlaceMode(0, VARIANT_FALSE); 
    }

    // Release pointers.
    if ( pPro2 )
    {
        pPro2->Release();
        pPro2 = NULL;
    }

Requirements

Header: wmencode.h

Library: wmenc.exe

See Also