LEADTOOLS Multimedia (Leadtools.Multimedia assembly)

AudioCompressors Property (CaptureCtrl)

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Example 



Gets the registered audio compressor collection object.
Syntax
'Declaration
 
Public Overridable ReadOnly Property AudioCompressors As AudioCompressors
'Usage
 
Dim instance As CaptureCtrl
Dim value As AudioCompressors
 
value = instance.AudioCompressors
public virtual AudioCompressors AudioCompressors {get;}
public:
virtual property AudioCompressors^ AudioCompressors {
   AudioCompressors^ get();
}

Property Value

An AudioCompressors collection object.
Remarks
The AudioCompressors object is used to enumerate the available audio compressors, and to select an audio compressor for the capturing process.
Example
Copy Code  
Imports Leadtools
Imports Leadtools.Multimedia
Imports LeadtoolsMultimediaExamples.Fixtures

Public _result As Boolean = False
Public _form As CaptureCtrlForm = New CaptureCtrlForm()
Public Sub CompressorsExample()
   ' reference the capture control
   Dim capturectrl As CaptureCtrl = _form.CaptureCtrl

   ' output file
   Dim outFile As String = Path.Combine(LEAD_VARS.MediaDir, "CaptureCtrl_CompressorsExample.avi")

   Try
      ' set the source video device, select using your device name here
      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 video device, select using your device name here
      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 compressor to H264
      capturectrl.VideoCompressors.H264.Selected = True

      ' set the audio compressor to AC3
      capturectrl.AudioCompressors.AC3.Selected = True

      ' set the target files
      capturectrl.TargetFile = outFile

      ' check if we have can capture video
      If capturectrl.IsModeAvailable(CaptureMode.VideoAndAudio) Then
         capturectrl.FrameDelay = 0.033 ' 30 frames per second
         capturectrl.TimeLimit = 10 ' just 10 seconds of capture time
         capturectrl.UseTimeLimit = True

         ' start the capture process
         capturectrl.StartCapture(CaptureMode.VideoAndAudio)
      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

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

   // output file
   string outFile = Path.Combine(LEAD_VARS.MediaDir,"CaptureCtrl_CompressorsExample.avi");

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

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

      // set the source video device, select using your device name here
      if (capturectrl.AudioDevices["USB"] == null)
         throw new Exception("No USB audio device available");

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

      // set the video compressor to H264
      capturectrl.VideoCompressors.H264.Selected = true;

      // set the audio compressor to AC3
      capturectrl.AudioCompressors.AC3.Selected = true;

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

      // check whether we can capture video
      if (capturectrl.IsModeAvailable(CaptureMode.VideoAndAudio))
      {
         capturectrl.FrameDelay = .033;  // 30 frames per second
         capturectrl.TimeLimit = 10;     // just 10 seconds of capture time
         capturectrl.UseTimeLimit = true;

         // start the capture process
         capturectrl.StartCapture(CaptureMode.VideoAndAudio);
      }
   }
   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();

   // 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";
}
Requirements

Target Platforms

See Also

Reference

CaptureCtrl Class
CaptureCtrl Members
AudioCompressors Property

 

 


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Leadtools.Multimedia requires a Multimedia or Multimedia Suite license and unlock key. For more information, refer to: LEADTOOLS Toolkit Features