ReadyCapture Method

Visual Basic
C#
WinRT C#
WinRT JavaScript
C++

public virtual void ReadyCapture( 
   CaptureMode lMode
)

'Declaration
 
Public Overridable Sub ReadyCapture( _
   ByVal lMode As CaptureMode _
)

'Usage
 
Dim instance As CaptureCtrl
Dim lMode As CaptureMode
 
instance.ReadyCapture(lMode)

public virtual void ReadyCapture( 
   CaptureMode lMode
)

 function Leadtools.Multimedia.CaptureCtrl.ReadyCapture( 
   lMode 
)

public:
virtual void ReadyCapture( 
   CaptureMode lMode
)

Parameters

lMode: The CaptureMode capture mode to set.

Prepares the capture graph for running. This is an optional method that performs time consuming initialization, allowing immediate execution with CaptureCtrl.StartCapture. If this method is used, it must be called prior to calling CaptureCtrl.StartCapture. However, you may call CaptureCtrl.StartCapture without calling CaptureCtrl.ReadyCapture, but capturing will not begin immediately. Places the object in the CaptureState.Pending state. If the method fails, an error is raised. For more information, refer to the Error Codes.

Visual Basic
C#
WinRT C#
WinRT JavaScript
Silverlight C#
Silverlight VB

Copy 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 175\Media";
End Class

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 whether we 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 175\Media";
}

Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

Reference

CaptureCtrl Class
CaptureCtrl Members