StartCapture Method

C#
Visual Basic
Objective-C
Java
C++

public virtual void StartCapture( 
   CaptureMode mode
)

'Declaration

Public Overridable Sub StartCapture( _
   ByVal mode As CaptureMode _
)

'Usage

Dim instance As CaptureCtrl
Dim mode As CaptureMode
 
instance.StartCapture(mode)

public:
virtual void StartCapture( 
   CaptureMode mode
)

Parameters

mode: Specifies the capture Mode. Must be one of the CaptureMode enumeration values.

Starts capturing data. Places the object in the CaptureState.Running state. If the method fails, an error is raised.

For more information, refer to the Error Codes.

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

Copy Code

Imports Leadtools
Imports Leadtools.Multimedia
Imports LeadtoolsMultimediaExamples.Fixtures

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

   Try
      ' try to find a USB video device, use your video device name here
      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

      ' MPEG4 is a good general 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 complete event
         AddHandler capturectrl.Complete, AddressOf CaptureCtrl_Complete

         ' start the capture process
         capturectrl.StartCapture(CaptureMode.Video)

         ' 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 CaptureCtrl_Complete(ByVal sender As Object, ByVal e As EventArgs)
   ' set result (capture has completed)
   _result = True
End Sub

Public NotInheritable Class LEAD_VARS
Public Const MediaDir As String = "C:\Program Files (x86)\LEAD Technologies\LEADTOOLS 19\Media"
End Class

using Leadtools;
using Leadtools.Multimedia;
using LeadtoolsMultimediaExamples.Fixtures;

public bool _result = false;
public CaptureCtrlForm _form = new CaptureCtrlForm();
public void CompleteExample()
{
   // reference the capture control
   CaptureCtrl capturectrl = _form.CaptureCtrl;
   string outFile =Path.Combine(LEAD_VARS.MediaDir,"CaptureCtrl_CompleteExample.avi");

   try
   {
      // try to find a USB video device. use your video device's name here
      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;

      // MPEG4 is a good general 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 complete event
         capturectrl.Complete += new EventHandler(CaptureCtrl_Complete);

         // start the capture process
         capturectrl.StartCapture(CaptureMode.Video);

         // 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 CaptureCtrl_Complete(object sender, EventArgs e)
{
   // set result (capture has completed)
   _result = true;
}

static class LEAD_VARS
{
public const string MediaDir = @"C:\Program Files (x86)\LEAD Technologies\LEADTOOLS 19\Media";
}

Target Platforms

Reference

CaptureCtrl Class
CaptureCtrl Members