ReadyCapture Method

Visual Basic
C#
C++/CLI

'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
)

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

Imports Leadtools
Imports Leadtools.Multimedia
Imports LeadtoolsMultimediaExamples.Fixtures

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 18\Media"
End Class

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

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 18\Media";
}

Target Platforms

Reference

CaptureCtrl Class
CaptureCtrl Members