VideoProcAmp Property

Visual Basic
C#
C++/CLI

'Declaration
 
Public Overridable ReadOnly Property VideoProcAmp As VideoProcAmp

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

public virtual VideoProcAmp VideoProcAmp {get;}

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

Property Value

A VideoProcAmp object.

Gets a VideoProcAmp object which enables the user to adjust the qualities of an incoming video signal, such as brightness, contrast, hue, saturation, gamma, and sharpness.

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 _outFile As String = Path.Combine(LEAD_VARS.MediaDir, "VideoProcAmp_GetExample.avi")
Public Sub GetExample()
   ' reference the capture control
   Dim capturectrl As CaptureCtrl = _form.CaptureCtrl

   Try
      ' select the first device with analog in it's name
      ' Replace "Analog" with your video capture device name
      If capturectrl.VideoDevices("Analog") Is Nothing Then
         Throw New Exception("No Analog video devices available!")
      End If

      capturectrl.VideoDevices("Analog").Selected = True

      ' set a video compressor
      capturectrl.VideoCompressors.Mpeg2.Selected = True

      ' set the target file
      capturectrl.TargetFile = _outFile

      ' reference the video proc amp 
      Dim videoprocamp As VideoProcAmp = capturectrl.VideoProcAmp

      If Not videoprocamp Is Nothing Then
         ' set the auto brightness property 
         videoprocamp.AutoBrightness = True

         ' set to black and white
         videoprocamp.ColorEnable = False

         ' enable backlight compensation, if available
         videoprocamp.BacklightCompensation = True
      End If

      ' check for video capture available
      If capturectrl.IsModeAvailable(CaptureMode.Video) Then
         ' capture 15 seconds of video
         capturectrl.UseTimeLimit = True
         capturectrl.TimeLimit = 15

         ' subscribe to the compete event
         AddHandler capturectrl.Complete, AddressOf CaptureCtrl_Complete
         ' start the capture
         capturectrl.StartCapture(CaptureMode.Video)
      End If
   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

Private Sub CaptureCtrl_Complete(ByVal sender As Object, ByVal e As EventArgs)
   ' set the result to what we expect
   _result = File.Exists(_outFile)
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 string _outFile = Path.Combine(LEAD_VARS.MediaDir, "VideoProcAmp_GetExample.avi");
public void GetExample()
{
   // reference the capture control
   CaptureCtrl capturectrl = _form.CaptureCtrl;

   try
   {
      // select the first device with analog in it's name
      // Replace "Analog" with your video capture device name
      if (capturectrl.VideoDevices["Analog"] == null)
         throw new Exception("No Analog video devices available!");

      capturectrl.VideoDevices["Analog"].Selected = true;

      // set a video compressor
      capturectrl.VideoCompressors.Mpeg2.Selected = true;

      // set the target file
      capturectrl.TargetFile = _outFile;

      // reference the video proc amp 
      VideoProcAmp videoprocamp = capturectrl.VideoProcAmp;

      if (videoprocamp != null)
      {
         // set the auto brightness property 
         videoprocamp.AutoBrightness = true;

         // set to black and white
         videoprocamp.ColorEnable = false;

         // enable backlight compensation, if available
         videoprocamp.BacklightCompensation = true;
      }

      // check for video capture available
      if (capturectrl.IsModeAvailable(CaptureMode.Video))
      {
         // capture 15 seconds of video
         capturectrl.UseTimeLimit = true;
         capturectrl.TimeLimit = 15;

         // subscribe to the compete event
         capturectrl.Complete += new EventHandler(CaptureCtrl_Complete);
         // start the capture
         capturectrl.StartCapture(CaptureMode.Video);
      }
   }
   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();
}

void CaptureCtrl_Complete(object sender, EventArgs e)
{
   // set the result to what we expect
   _result = File.Exists(_outFile);
}

static class LEAD_VARS
{
public const string MediaDir = @"C:\Program Files (x86)\LEAD Technologies\LEADTOOLS 18\Media";
}

Target Platforms

Reference

CaptureCtrl Class
CaptureCtrl Members