TargetDevices Property (CaptureCtrl)

Visual Basic
C#
C++/CLI

'Declaration
 
Public Overridable ReadOnly Property TargetDevices As TargetDevices

'Usage
 
Dim instance As CaptureCtrl
Dim value As TargetDevices
 
value = instance.TargetDevices

public virtual TargetDevices TargetDevices {get;}

public:
virtual property TargetDevices^ TargetDevices {
   TargetDevices^ get();
}

Property Value

A TargetDevices object representing the capture output devices.

The TargetDevices object is used to enumerate and select capture output devices.

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 TargetDevicesExample()
   ' reference the capture control
   Dim capturectrl As CaptureCtrl = _form.CaptureCtrl

   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

      ' try to find a USB audio device
      If capturectrl.AudioDevices("USB") Is Nothing Then
         Throw New Exception("No USB audio device available")
      End If

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

      ' set the target device, select the first target device
      Dim Devices As TargetDevices = capturectrl.TargetDevices
      If Devices(0) Is Nothing Then
         Throw New Exception("No target device available")
      End If

      Devices.Selection = 0

      ' set MPEG2 as the video compressor
      capturectrl.VideoCompressors.Mpeg2.Selected = True

      ' set AC3 as the audio compressor
      capturectrl.AudioCompressors.AC3.Selected = True

      ' set the target output format
      capturectrl.TargetFormat = TargetFormatType.AVI


      ' check if we have can capture video
      If capturectrl.IsModeAvailable(CaptureMode.VideoAndAudio) Then
         capturectrl.FrameRate = 5 ' 5 frames per second
         capturectrl.UseFrameRate = True
         capturectrl.TimeLimit = 10 ' just 10 seconds of capture time
         capturectrl.UseTimeLimit = True

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

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

         ' 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

Private Sub CaptureCtrl_Complete(ByVal sender As Object, ByVal e As EventArgs)
   _result = True
End Sub

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

public bool _result = false;
public CaptureCtrlForm _form = new CaptureCtrlForm();
// capture control
CaptureCtrl capturectrl;

public void TargetDevicesExample()
{
   // reference the capture control
   capturectrl = _form.CaptureCtrl;

   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;

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

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

      // set the target device, select the first target device
      TargetDevices Devices = capturectrl.TargetDevices;
      if (Devices[0] == null)
      {
         throw new Exception("No target device available");
      }

      Devices.Selection = 0;

      // set MPEG2 as the video compressor
      capturectrl.VideoCompressors.Mpeg2.Selected = true;

      // set AC3 as the audio compressor
      capturectrl.AudioCompressors.AC3.Selected = true;

      // set the target output format
      capturectrl.TargetFormat = TargetFormatType.AVI;


      // check whether we can capture video
      if (capturectrl.IsModeAvailable(CaptureMode.VideoAndAudio))
      {
         capturectrl.FrameRate = 5;
         // 5 frames per second
         capturectrl.UseFrameRate = true;
         capturectrl.TimeLimit = 10;
         // just 10 seconds of capture time
         capturectrl.UseTimeLimit = true;

         // subscribe to the compete event
         capturectrl.Complete += new EventHandler(CaptureCtrl_Complete);

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

         // 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 (COMException)
   {
      _result = false;
   }
   catch (Exception)
   {
      _result = false;
   }
}

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

Target Platforms

Reference

CaptureCtrl Class
CaptureCtrl Members