AutoGain Property

Visual Basic
C#
C++/CLI

'Declaration
 
Public Property AutoGain As Boolean

'Usage
 
Dim instance As VideoProcAmp
Dim value As Boolean
 
instance.AutoGain = value
 
value = instance.AutoGain

public bool AutoGain {get; set;}

public:
property bool AutoGain {
   bool get();
   void set (    bool value);
}

Property Value

true if the property is controlled automatically; false if it has been set to a manual value

If this property is true, the Gain property is the current automatically controlled value. If this property is false, then the Gain property returns the current manual value last set by the user.

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_SetAutoValueExample.avi")
' this example demonstrates how to set an auto value on the
' video proc amp object.

Public Sub SetAutoValueExample()
   ' 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("Logitech") Is Nothing Then
         Throw New Exception("No Logitech video devices available!")
      End If

      capturectrl.VideoDevices("Logitech").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

      ' try to set the auto value
      If Not videoprocamp Is Nothing Then
         videoprocamp.AutoSaturation = 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_SetAutoValueExample.avi");
// this example demonstrates how to set an auto value on the
// video proc amp object.

public void SetAutoValueExample()
{
   // 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["Logitech"] == null)
         throw new Exception("No Logitech video devices available!");

      capturectrl.VideoDevices["Logitech"].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;

      // try to set the auto value
      if (videoprocamp != null)
         videoprocamp.AutoSaturation = 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

VideoProcAmp Class
VideoProcAmp Members