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AutoGain Property

Summary

Gets or sets the automatic setting for the Gain property.

Syntax

C++/CLI

public bool AutoGain { get; set; }

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

Property Value

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

Remarks

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.

Example

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 Logitech in it's name 
      // Replace "Logitech" with your video capture device name 
      if (capturectrl.VideoDevices["USB"] == null) 
         throw new Exception("No USB video devices available!"); 
 
      capturectrl.VideoDevices["USB"].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 values 
      if (videoprocamp != null) 
      { 
         videoprocamp.AutoBrightness = true; 
         videoprocamp.AutoContrast = true; 
         videoprocamp.AutoGain = true; 
         videoprocamp.AutoGamma = true; 
         videoprocamp.AutoHue = true; 
         videoprocamp.AutoSaturation = true; 
         videoprocamp.AutoSharpness = true; 
         videoprocamp.AutoWhiteBalance = 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:\LEADTOOLS23\Media"; 
}

Requirements

Target Platforms

Reference

VideoProcAmp Class

VideoProcAmp Members

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Help Version 23.0.2024.2.29

Leadtools.Multimedia Assembly

Introduction

Getting Started

Namespaces

Leadtools.Multimedia Namespace

Leadtools.Multimedia.Common Namespace

Assemblies