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RunCapture Method
See Also 
Leadtools.Multimedia Namespace > CaptureCtrl Class : RunCapture Method



Runs the capture graph.

Syntax

Visual Basic (Declaration) 
Public Overridable Sub RunCapture() 
Visual Basic (Usage)Copy Code
Dim instance As CaptureCtrl
 
instance.RunCapture()
C# 
public virtual void RunCapture()
C++/CLI 
public:
virtual void RunCapture(); 

Example

Visual BasicCopy Code
Public _result As Boolean = False
      Public _form As CaptureCtrlForm = New CaptureCtrlForm()
      Public Sub RunCaptureExample()
         ' reference the capture control
         Dim capturectrl As CaptureCtrl = _form.CaptureCtrl
         Dim outFile As String = Path.Combine(LEAD_VARS.MediaDir, "CaptureCtrl_RunCaptureExample.avi")

         Try
            ' try to find a USB camera
            If capturectrl.VideoDevices("USB") Is Nothing Then
               Throw New Exception("No USB video device available")
            End If

            capturectrl.VideoDevices("USB").Selected = True

            ' set the target output file
            capturectrl.TargetFile = outFile

            ' select a video compressor
            capturectrl.VideoCompressors.Mpeg4.Selected = True

            ' check if we have can capture video
            If capturectrl.IsModeAvailable(CaptureMode.Video) Then
               capturectrl.FrameDelay = 0.033 ' 30 frames per second
               capturectrl.TimeLimit = 10 ' just 10 seconds of capture time
               capturectrl.UseTimeLimit = True

               ' subscribe to the compete event
               AddHandler capturectrl.Complete, AddressOf RunCapture_Helper

               ' prepare the capture process
               capturectrl.ReadyCapture(CaptureMode.Video Or CaptureMode.InhibitRun)

               ' actually run the capture now!
               capturectrl.RunCapture()

               ' we'll loop on the state and pump messages for this example.
               ' but you should not need to if running from a Windows Forms application.
               Do While capturectrl.State = CaptureState.Running
                  Application.DoEvents()
               Loop
            End If
         Catch e1 As Exception
            _result = False
         End Try
      End Sub

      Public Sub RunCapture_Helper(ByVal sender As Object, ByVal e As EventArgs)
         ' set result
         _result = True
      End Sub

Public NotInheritable Class LEAD_VARS
   Public Const MediaDir As String = "C:\Program Files (x86)\LEAD Technologies\LEADTOOLS 17\Media"
End Class
C#Copy Code
public bool _result = false;
      public CaptureCtrlForm _form = new CaptureCtrlForm();
      public void RunCaptureExample()
      {
         // reference the capture control
         CaptureCtrl capturectrl = _form.CaptureCtrl;
         string outFile = Path.Combine(LEAD_VARS.MediaDir,"CaptureCtrl_RunCaptureExample.avi");

         try
         {
            // try to find a USB camera
            if (capturectrl.VideoDevices["USB"] == null)
               throw new Exception("No USB video device available");

            capturectrl.VideoDevices["USB"].Selected = true;

            // set the target output file
            capturectrl.TargetFile = outFile;

            // select a video compressor
            capturectrl.VideoCompressors.Mpeg4.Selected = true;

            // check if we have can capture video
            if (capturectrl.IsModeAvailable(CaptureMode.Video))
            {
               capturectrl.FrameDelay = .033;  // 30 frames per second
               capturectrl.TimeLimit = 10;     // just 10 seconds of capture time
               capturectrl.UseTimeLimit = true;

               // subscribe to the compete event
               capturectrl.Complete += RunCapture_Helper;

               // prepare the capture process
               capturectrl.ReadyCapture(CaptureMode.Video | CaptureMode.InhibitRun);

               // actually run the capture now!
               capturectrl.RunCapture();

               // we'll loop on the state and pump messages for this example.
               // but you should not need to if running from a Windows Forms application.
               while (capturectrl.State == CaptureState.Running)
                  Application.DoEvents();
            }
         }
         catch (Exception)
         {
            _result = false;
         }
      }

      public void RunCapture_Helper(object sender, EventArgs e)
      {
         // set result
         _result = true;
      }

static class LEAD_VARS
{
   public const string MediaDir = @"C:\Program Files (x86)\LEAD Technologies\LEADTOOLS 17\Media";
}

Remarks

Places the object in the CaptureState.Running state. The object must be in the CaptureState.Pending or CaptureState.Paused state prior to calling this method. This method is usually called after the PauseCapture method.

If the method fails, an error is raised. For more information, refer to the Error Codes.

Requirements

Target Platforms: Microsoft .NET Framework 2.0, Windows 2000, Windows XP, Windows Server 2003 family, Windows Server 2008 family, Windows Vista, Windows 7

See Also