通过

IMSVidVideoRenderer::Capture

  • 项目
 
Microsoft DirectShow 9.0

IMSVidVideoRenderer::Capture

This topic applies to Windows XP or later.

The Capture method captures the video frame that is currently being rendered by the Video Mixing Renderer (VMR).

Syntax

  HRESULT Capture(
  
  IPictureDisp**
  currentImage);

Parameters

  ppcurrentImage

[out]  Address of a variable that receives an IPictureDisp interface pointer.

Return Values

If the method succeeds, it returns S_OK. If it fails, it returns an error code.

Remarks

The returned IPictureDisp interface has an outstanding reference count. The caller must release the interface.

For information about the IPictureDisp interface, see the Microsoft Platform SDK documentation.

Example Code

CComPtr<IMSVidCtl> m_pVideoControl; // Pointer to the Video Control.

/* Build and run the filter graph (not shown). */

// Find the video renderer
CComPtr<IMSVidVideoRenderer> pVideo;
hr = m_pVideoControl->get_VideoRendererActive(&pVideo);
if (SUCCEEDED(hr))
{
    // Capture the image.
    CComPtr<IPictureDisp> pPic;
    hr = pVideo->Capture(&pPic);
}

Requirements

  Header: Dshow.h.

  Library: Quartz.dll.

See Also