AudioProcessors Property (CaptureCtrl)

Gets the registered audio processor collection object.

Syntax

Visual Basic
C#
C++/CLI

'Declaration
 
Public ReadOnly Property AudioProcessors As AudioProcessors

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

public AudioProcessors AudioProcessors {get;}

public:
property AudioProcessors^ AudioProcessors {
   AudioProcessors^ get();
}

Property Value

An AudioProcessors collection object representing the available audio processors.

Remarks

The AudioProcessors object is used to enumerate the available audio processing filters.

For more information, refer to AudioProcessors.

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 ProcessorsExample()
   Dim capturectrl As CaptureCtrl = _form.CaptureCtrl
   Dim outFile As String = Path.Combine(LEAD_VARS.MediaDir, "CaptureCtrl_ProcessorsExample.avi")

   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 video processor to the Dizzy filter 
      capturectrl.SelectedVideoProcessors.Add(capturectrl.VideoProcessors.EFXDizzy)
      Dim vproc As Processor = capturectrl.SelectedVideoProcessors.EFXDizzy

      ' set the audio processor to the Chorus filter 
      capturectrl.SelectedAudioProcessors.Add(capturectrl.AudioProcessors.Chorus)
      Dim aproc As Processor = capturectrl.SelectedAudioProcessors.Chorus

      ' set the video processor properties
      If vproc.HasDialog(ProcessorDlg.Properties) Then
         vproc.ShowDialog(ProcessorDlg.Properties, _form)
      End If

      ' set the audio processor properties
      If aproc.HasDialog(ProcessorDlg.Properties) Then
         aproc.ShowDialog(ProcessorDlg.Properties, _form)
      End If

      ' 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 file and format
      capturectrl.TargetFile = outFile

      ' 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 complete 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

Public Sub CaptureCtrl_Complete(ByVal sender As Object, ByVal e As EventArgs)
   ' set result
   _result = True
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 ProcessorsExample()
{
   CaptureCtrl capturectrl = _form.CaptureCtrl;
   string outFile = Path.Combine(LEAD_VARS.MediaDir,"CaptureCtrl_ProcessorsExample.avi");

   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 video processor to the Dizzy filter 
      capturectrl.SelectedVideoProcessors.Add(capturectrl.VideoProcessors.EFXDizzy);
      Processor vproc = capturectrl.SelectedVideoProcessors.EFXDizzy;

      // set the audio processor to the Chorus filter 
      capturectrl.SelectedAudioProcessors.Add(capturectrl.AudioProcessors.Chorus);
      Processor aproc = capturectrl.SelectedAudioProcessors.Chorus;

      // set the video processor properties
      if (vproc.HasDialog(ProcessorDlg.Properties))
         vproc.ShowDialog(ProcessorDlg.Properties, _form);

      // set the audio processor properties
      if (aproc.HasDialog(ProcessorDlg.Properties))
         aproc.ShowDialog(ProcessorDlg.Properties, _form);

      // 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 file and format
      capturectrl.TargetFile = outFile;

      // 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 complete 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 (Exception)
   {
      _result = false;
   }
}

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

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
AudioProcessors Class