Public Overridable Function EstimateOutputSize( _
   ByVal duration As Double _
) As Double

Dim instance As ConvertCtrl
Dim duration As Double
Dim value As Double
 
value = instance.EstimateOutputSize(duration)

public virtual double EstimateOutputSize( 
   double duration
)

public:
virtual double EstimateOutputSize( 
   double duration
) 

Public _result As Boolean = False
      Public _form As ConvertCtrlForm = New ConvertCtrlForm()
      Public _convertctrl As ConvertCtrl
      Public _estBitRate As Integer = 0
      Public _estFileSize As Double = 0.0
      Public Sub EstimateExample()
         ' reference the convert control
         _convertctrl = _form.ConvertCtrl

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

         Try
            ' set the source video
            _convertctrl.SourceFile = inFile

            ' set video and audio compressors
            _convertctrl.VideoCompressors.H264.Selected = True
            _convertctrl.AudioCompressors.AC3.Selected = True

            ' subscribe to the progress event
            AddHandler _convertctrl.Progress, AddressOf ConvertCtrl_Progress

            ' set the capture target file
            _convertctrl.TargetFile = outFile

            ' set the capture mode to still and start
            _convertctrl.StartConvert()

            ' 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 _convertctrl.State = ConvertState.Running
               Application.DoEvents()
            Loop

            ' set the result to what we expect
            _result = (_estBitRate <> 0 AndAlso _estFileSize <> 0.0)
         Catch e1 As Exception
            _result = False
         End Try
      End Sub

      Private Sub ConvertCtrl_Progress(ByVal sender As Object, ByVal e As ProgressEventArgs)
         ' get the bit rate estimate
         ' we will get called multiple time throughout the conversion process
         ' but for this example it is ok just to use the last received estimate
         _estBitRate = _convertctrl.EstimateOutputBitRate()

         ' get the file size estimate
         _estFileSize = _convertctrl.EstimateOutputSize(CDbl(e.time))
      End Sub

Public NotInheritable Class LEAD_VARS
   Public Const MediaDir As String = "C:\Program Files (x86)\LEAD Technologies\LEADTOOLS 17\Media"
End Class

public bool _result = false;
      public ConvertCtrlForm _form = new ConvertCtrlForm();
      public ConvertCtrl _convertctrl;
      public int _estBitRate = 0;
      public double _estFileSize = 0.0;
      public void EstimateExample()
      {
         // reference the convert control
         _convertctrl = _form.ConvertCtrl;

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

         try
         {
            // set the source video
            _convertctrl.SourceFile = inFile;

            // set video and audio compressors
            _convertctrl.VideoCompressors.H264.Selected = true;
            _convertctrl.AudioCompressors.AC3.Selected = true;

            // subscribe to the progress event
            _convertctrl.Progress += new ProgressEventHandler(ConvertCtrl_Progress);

            // set the capture target file
            _convertctrl.TargetFile = outFile;

            // set the capture mode to still and start
            _convertctrl.StartConvert();

            // 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 (_convertctrl.State == ConvertState.Running)
               Application.DoEvents();

            // set the result to what we expect
            _result = (_estBitRate != 0 && _estFileSize != 0.0);
         }
         catch (Exception)
         {
            _result = false;
         }
      }

      void ConvertCtrl_Progress(object sender, ProgressEventArgs e)
      {
         // get the bit rate estimate
         // we will get called multiple time throughout the conversion process
         // but for this example it is ok just to use the last received estimate
         _estBitRate = _convertctrl.EstimateOutputBitRate();

         // get the file size estimate
         _estFileSize = _convertctrl.EstimateOutputSize((double)e.time);
      }

static class LEAD_VARS
{
   public const string MediaDir = @"C:\Program Files (x86)\LEAD Technologies\LEADTOOLS 17\Media";
}