PreviewAudioProcessors Property

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 19\Media"
End Class