Leadtools.MediaFoundation Namespace > Classes > ConvertCtrl > Methods > EstimateOutputSize Method

public virtual double EstimateOutputSize(  
   double duration 
) 

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

public: 
virtual double EstimateOutputSize(  
   double duration 
)  

using Leadtools; 
using Leadtools.MediaFoundation; 
using LeadtoolsMediaFoundationExamples.Fixtures; 
 
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.MP4"); 
 
   try 
   { 
      // set the source video 
      _convertctrl.SourceFile = inFile; 
 
      // select MP4 target format 
      _convertctrl.TargetFormat = TargetFormatType.MP4; 
 
      // select H264 video target format 
      int index = -1; 
      TargetVideoFormats targetvideoformats = _convertctrl.TargetFormats[_convertctrl.TargetFormat].VideoFormats; 
      index = targetvideoformats.IndexOf("{34363248-0000-0010-8000-00AA00389B71}");// H264 
      targetvideoformats.Selection = index; 
 
      // select AAC audio target format 
      TargetAudioFormats targetaudioformats = _convertctrl.TargetFormats[_convertctrl.TargetFormat].AudioFormats; 
      index = targetaudioformats.IndexOf("{00001610-0000-0010-8000-00AA00389B71}");// AAC 
      targetaudioformats.Selection = index; 
 
      // 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 19\Media"; 
} 

Imports Leadtools 
Imports Leadtools.MediaFoundation 
Imports LeadtoolsMediaFoundationExamples.Fixtures 
 
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.mp4") 
 
   Try 
      ' set the source video 
      _convertctrl.SourceFile = inFile 
 
      ' select MP4 target format 
      _convertctrl.TargetFormat = TargetFormatType.MP4 
 
      ' select H264 video target format 
      Dim index As Integer = -1 
      Dim trgvideoformats As TargetVideoFormats = _convertctrl.TargetFormats(_convertctrl.TargetFormat).VideoFormats 
      index = trgvideoformats.IndexOf("{34363248-0000-0010-8000-00AA00389B71}") ' H264 
      trgvideoformats.Selection = index 
 
      ' select AAC audio target format 
      Dim trgaudioformats As TargetAudioFormats = _convertctrl.TargetFormats(_convertctrl.TargetFormat).AudioFormats 
      index = trgaudioformats.IndexOf("{00001610-0000-0010-8000-00AA00389B71}") ' AAC 
      trgaudioformats.Selection = index 
 
      ' 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 19\Media" 
End Class 

Products | Support | Contact Us | Copyright Notices
© 1991-2017 LEAD Technologies, Inc. All Rights Reserved.

Leadtools.MediaFoundation Assembly