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Progress Event

Summary

Occurs periodically during a conversion operation to notify percentage completed.

Syntax

C++

public event ProgressEventHandler Progress

Public Event Progress As ProgressEventHandler

public: 
event ProgressEventHandler^ Progress

Event Data

The event handler receives an argument of type ProgressEventArgs containing data related to this event. The following ProgressEventArgs properties provide information specific to this event.

Property	Description
percent	The percentage complete for convert progress notifications.
time	The time elapsed for capture progress notifications.

Remarks

The event handler is passed a ProgressEventArgs containing the percentage completed.

Example

using Leadtools; 
using Leadtools.MediaFoundation; 
using LeadtoolsMediaFoundationExamples.Fixtures; 
 
public bool _result = false; 
public ConvertCtrlForm _form = new ConvertCtrlForm(); 
 
public void ProgressExample() 
{ 
   string inFile = Path.Combine(LEAD_VARS.MediaDir, "ConvertCtrl_Source.avi"); 
   string outFile = Path.Combine(LEAD_VARS.MediaDir, "ConvertCtrl_ProgressExample.MP4"); 
 
   // reference the convert control 
   ConvertCtrl convertctrl = _form.ConvertCtrl; 
 
   try 
   { 
      // set the input and output files 
      convertctrl.SourceFile = inFile; 
      convertctrl.TargetFile = outFile; 
 
      // select the target format 
      convertctrl.TargetFormat = TargetFormatType.MP4; 
 
      // select video and audio target formats for the output 
      int index = -1; 
      TargetVideoFormats targetvideoformats = convertctrl.TargetFormats[convertctrl.TargetFormat].VideoFormats; 
      index = targetvideoformats.IndexOf("{34363248-0000-0010-8000-00AA00389B71}");// H264 
      targetvideoformats.Selection = index; 
      TargetAudioFormats targetaudioformats = convertctrl.TargetFormats[convertctrl.TargetFormat].AudioFormats; 
      index = targetaudioformats.IndexOf("{00001610-0000-0010-8000-00AA00389B71}");// AAC 
      targetaudioformats.Selection = index; 
 
      // set our progress event handler 
      convertctrl.Progress += new ProgressEventHandler(ConvertCtrl_Progress); 
 
      // convert it now! 
      convertctrl.StartConvert(); 
   } 
   catch (COMException cex) 
   { 
      if (cex.ErrorCode == (int)ErrorCode.VFW_E_WRONG_STATE) 
         throw cex; 
      _result = false; 
   } 
   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 (convertctrl.State == ConvertState.Running) 
      Application.DoEvents(); 
} 
 
public void ConvertCtrl_Progress(object sender, ProgressEventArgs e) 
{ 
   // set the result to true if complete 
   if (e.percent == 100) 
      _result = true; 
} 
 
static class LEAD_VARS 
{ 
   public const string MediaDir = @"C:\Program Files (x86)\LEAD Technologies\LEADTOOLS 20\Media"; 
}

Imports Leadtools 
Imports Leadtools.MediaFoundation 
Imports LeadtoolsMediaFoundationExamples.Fixtures 
 
Public _result As Boolean = False 
Public _form As ConvertCtrlForm = New ConvertCtrlForm() 
 
Public Sub ProgressExample() 
   Dim inFile As String = Path.Combine(LEAD_VARS.MediaDir, "ConvertCtrl_Source.avi") 
   Dim outFile As String = Path.Combine(LEAD_VARS.MediaDir, "ConvertCtrl_ProgressExample.MP4") 
 
   ' reference the convert control 
   Dim convertctrl As ConvertCtrl = _form.ConvertCtrl 
 
   Try 
      ' set the input and output files 
      convertctrl.SourceFile = inFile 
      convertctrl.TargetFile = outFile 
 
      ' set the target format 
      convertctrl.TargetFormat = TargetFormatType.MP4 
 
      ' select video and audio target formats for the output 
      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 
      Dim trgaudioformats As TargetAudioFormats = convertctrl.TargetFormats(convertctrl.TargetFormat).AudioFormats 
      index = trgaudioformats.IndexOf("{00001610-0000-0010-8000-00AA00389B71}") ' AAC 
      trgaudioformats.Selection = index 
 
      ' set our progress event handler 
      AddHandler convertctrl.Progress, AddressOf ConvertCtrl_Progress 
 
      ' convert it now! 
      convertctrl.StartConvert() 
   Catch cex As COMException 
      If cex.ErrorCode = CInt(ErrorCode.VFW_E_WRONG_STATE) Then 
         Throw cex 
      End If 
      _result = False 
   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 convertctrl.State = ConvertState.Running 
      Application.DoEvents() 
   Loop 
End Sub 
 
Public Sub ConvertCtrl_Progress(ByVal sender As Object, ByVal e As ProgressEventArgs) 
   ' set the result to true if complete 
   If e.percent = 100 Then 
      _result = True 
   End If 
End Sub 
 
Public NotInheritable Class LEAD_VARS 
   Public Const MediaDir As String = "C:\Program Files (x86)\LEAD Technologies\LEADTOOLS 20\Media" 
End Class

Requirements

Target Platforms

Reference

ConvertCtrl Class

ConvertCtrl Members

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Help Version 20.0.2020.4.2

Leadtools.MediaFoundation Assembly

Introduction

Getting Started

Namespaces

Leadtools.MediaFoundation Namespace

Leadtools.MediaFoundation.Common Namespace

Assemblies