ErrorAbort Event (CaptureCtrl)

The event handler is passed an ErrorAbortEventArgs. object containing the related error code. For more information, refer to the Error Codes.

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Imports Leadtools
Imports Leadtools.Multimedia
Imports LeadtoolsMultimediaExamples.Fixtures

Public _result As Boolean = False
Public _form As CaptureCtrlForm = New CaptureCtrlForm()
Public _capturectrl As CaptureCtrl
Public _totalTime As Double
Public Sub ErrorAbortExample()
   ' reference the capture control
   _capturectrl = _form.CaptureCtrl

   ' output file
   Dim outFile As String = Path.Combine(LEAD_VARS.MediaDir, "CaptureCtrl_ErrorAbortTest.avi")

   Try
      ' set a test timer to interrupt the capture
      _form.TestTimer.Interval = 5000
      AddHandler _form.TestTimer.Tick, AddressOf TestTimer_Tick
      _form.TestTimer.Start()

      ' initialize the total capture time
      _totalTime = 0

      ' subscribe to the ErrorAbort event
      AddHandler _capturectrl.ErrorAbort, AddressOf CaptureCtrl_ErrorAbort

      ' subscribe to the event
      AddHandler _capturectrl.Progress, AddressOf CaptureCtrl_Progress

      ' set a video device, use the name of your device here
      If _capturectrl.VideoDevices("USB") Is Nothing Then
         Throw New Exception("No USB video device available")
      End If

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

      ' select the MPEG4 video compressor
      _capturectrl.VideoCompressors.Mpeg4.Selected = True

      ' set an audio device, use the name of your device here
      _capturectrl.AudioDevices("USB").Selected = True

      ' set the target output file
      _capturectrl.TargetFile = outFile

      ' only 10 seconds of capture time
      _capturectrl.TimeLimit = 10
      _capturectrl.UseTimeLimit = True

      ' capture it now!
      _capturectrl.StartCapture(CaptureMode.AutoFramesAndAudio)
   Catch e1 As Exception
      _result = False
   End Try

   ' 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 Sub

Public Sub TestTimer_Tick(ByVal sender As Object, ByVal e As EventArgs)
   ' stop the capture
   _capturectrl.StopCapture()
End Sub

Public Sub CaptureCtrl_Progress(ByVal sender As Object, ByVal e As ProgressEventArgs)
   _totalTime = _capturectrl.CaptureTime
End Sub

Public Sub CaptureCtrl_ErrorAbort(ByVal sender As Object, ByVal e As ErrorAbortEventArgs)
   ' 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 CaptureCtrl _capturectrl;
public double _totalTime;
public void ErrorAbortExample()
{
   // reference the capture control
   _capturectrl = _form.CaptureCtrl;

   // output file
   string outFile = Path.Combine(LEAD_VARS.MediaDir,"CaptureCtrl_ErrorAbortTest.avi");

   try
   {
      // set a test timer to interrupt the capture
      _form.TestTimer.Interval = 5000;
      _form.TestTimer.Tick += new EventHandler(TestTimer_Tick);
      _form.TestTimer.Start();

      // initialize the total capture time
      _totalTime = 0;

      // subscribe to the ErrorAbort event
      _capturectrl.ErrorAbort += new ErrorAbortEventHandler(CaptureCtrl_ErrorAbort);

      // subscribe to the event
      _capturectrl.Progress += new ProgressEventHandler(CaptureCtrl_Progress);

      // set a video device, use the name of your device here
      if (_capturectrl.VideoDevices["USB"] == null)
         throw new Exception("No USB video device available");

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

      // select the MPEG4 video compressor
      _capturectrl.VideoCompressors.Mpeg4.Selected = true;

      // set an audio device, use the name of your device here
      _capturectrl.AudioDevices["USB"].Selected = true;

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

      // only 10 seconds of capture time
      _capturectrl.TimeLimit = 10;
      _capturectrl.UseTimeLimit = true;

      // capture it now!
      _capturectrl.StartCapture(CaptureMode.AutoFramesAndAudio);
   }
   catch (Exception)
   {
      _result = false;
   }

   // 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();
}

public void TestTimer_Tick(object sender, EventArgs e)
{
   // stop the capture
   _capturectrl.StopCapture();
}

public void CaptureCtrl_Progress(object sender, ProgressEventArgs e)
{
   _totalTime = _capturectrl.CaptureTime;
}

public void CaptureCtrl_ErrorAbort(object sender, ErrorAbortEventArgs 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