UseTimeLimit Property

Gets or sets the option to use the time limit specified by the TimeLimit property.

Syntax

Visual Basic
C#
C++/CLI

'Declaration
 
Public Overridable Property UseTimeLimit As Boolean

'Usage
 
Dim instance As CaptureCtrl
Dim value As Boolean
 
instance.UseTimeLimit = value
 
value = instance.UseTimeLimit

public virtual bool UseTimeLimit {get; set;}

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

Property Value

true if the TimeLimit property is enabled; false, otherwise.

Remarks

Assignment can raise an error exception. For more information, refer to the Error Codes.

Example

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

   ' input and output files
   Dim inFile As String = Path.Combine(LEAD_VARS.MediaDir, "CaptureCtrl_Source.avi")
   Dim outFile As String = Path.Combine(LEAD_VARS.MediaDir, "CaptureCtrl_GetSubObjectExample.avi")

   Try
      ' set the source video device
      If capturectrl.VideoDevices("USB") Is Nothing Then
         Throw New Exception("No USB video device available")
      End If

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

      ' set the source 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 output files
      capturectrl.TargetFile = outFile

      ' set the audio and video compression
      capturectrl.VideoCompressors.Mpeg2.Selected = True
      capturectrl.AudioCompressors.AC3.Selected = True

      ' add the color adjustment processor
      capturectrl.SelectedVideoProcessors.Add(capturectrl.VideoProcessors.Color)

      ' access the Color filter directly via the GetSubObject method
      Dim lmvc As LMVColor = TryCast(capturectrl.GetSubObject(CaptureObject.SelVideoProcessor), LMVColor)

      If Not lmvc Is Nothing Then
         ' change some settings
         lmvc.Brightness = 85
         lmvc.Contrast = 85
         lmvc.Enabled = True
         lmvc.EffectAreaEnabled = False

         Marshal.ReleaseComObject(lmvc)
      End If

      ' 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

         ' 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

   ' 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 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 void GetSubObjectExample()
{
   // reference the capture control
   CaptureCtrl capturectrl = _form.CaptureCtrl;

   // input and output files
   string inFile =Path.Combine(LEAD_VARS.MediaDir,"CaptureCtrl_Source.avi");
   string outFile = Path.Combine(LEAD_VARS.MediaDir,"CaptureCtrl_GetSubObjectExample.avi");

   try
   {
      // set the source video device
      if (capturectrl.VideoDevices["USB"] == null)
         throw new Exception("No USB video device available");

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

      // set the source audio device
      if (capturectrl.AudioDevices["USB"] == null)
         throw new Exception("No USB audio device available");

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

      // set the output files
      capturectrl.TargetFile = outFile;

      // set the audio and video compression
      capturectrl.VideoCompressors.Mpeg2.Selected = true;
      capturectrl.AudioCompressors.AC3.Selected = true;

      // add the color adjustment processor
      capturectrl.SelectedVideoProcessors.Add(capturectrl.VideoProcessors.Color);

      // access the Color filter directly via the GetSubObject method
      LMVColor lmvc = capturectrl.GetSubObject(CaptureObject.SelVideoProcessor) as LMVColor;

      if (lmvc != null)
      {
         // change some settings
         lmvc.Brightness = 85;
         lmvc.Contrast = 85;
         lmvc.Enabled = true;
         lmvc.EffectAreaEnabled = false;

         Marshal.ReleaseComObject(lmvc);
      }

      // 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;

         // 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 (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();
}

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

Requirements

Target Platforms

Reference

CaptureCtrl Class
CaptureCtrl Members