Open a Video Capture Device

This is a brief coding example that illustrates how to open an video capture device and display the live image data stream using Visual Studio™ C++.

Language:Visual C++
Version:3.3
Author:IC Imaging Control Support Department

Requirements:
Software:IC Imaging Control >3.3, Visual Studio™ 2010
Hardware:Camera, converter or grabber with WDM Stream Class drivers.
Download C++ sampleOpen Device

The sample application's window looks as follows:

The dialog window of the sample application.

First of all the instance of the Grabber class is to be created as member of the dialog class. 

      
DShowLib::Grabber        m_cGrabber; // The instance of the Grabber class.

The video capture device will be opened in the CDialog::OnInitDialog() method. Its device name string, e.g. "DBK 21F04" is passed to Grabber::openDev(). If the video capture device has been opened successfully, i.e. it is valid, the image data stream is started by a call to Grabber::startLive(). 

      
m_cGrabber.openDev( "DFK 23UP031" );

if( m_cGrabber.isDevValid())
        m_cGrabber.startLive();