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GetSubObject Method

Summary

Gets the specified graph sub-object.

Syntax

C++

public virtual object GetSubObject( 
   ConvertObject objType 
)

Public Overridable Function GetSubObject( _ 
   ByVal objType As ConvertObject _ 
) As Object

public: 
virtual Object^ GetSubObject(  
   ConvertObject objType 
)

Parameters

objType
Value that specifies which graph sub-object to get. Must be one of the ConvertObject enumeration values.

Return Value

ConvertObject

Remarks

Gets the specified graph sub-object (including a filter being cached) from the convert graph. If the method fails, an error is raised. For more information, refer to the Error Codes.

Example

using Leadtools; 
using Leadtools.Multimedia; 
using LeadtoolsMultimediaExamples.Fixtures; 
 
public bool _result = false; 
public ConvertCtrlForm _form = new ConvertCtrlForm(); 
 
public void GetSubObjectExample() 
{ 
   // reference the convert control 
   ConvertCtrl 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_GetSubObjectExample.avi"); 
 
   try 
   { 
      // set the input and output files 
      convertctrl.SourceFile = inFile; 
      convertctrl.TargetFile = outFile; 
 
      // set the audio and video compression 
      convertctrl.VideoCompressors.Mpeg2.Selected = true; 
      convertctrl.AudioCompressors.AC3.Selected = true; 
 
      // add the color adjustment processor 
      convertctrl.SelectedVideoProcessors.Add(convertctrl.VideoProcessors.Color); 
 
      // access the processor directly 
      LMVColor lmvc = convertctrl.GetSubObject(ConvertObject.SelVideoProcessor) as LMVColor; 
 
      if (lmvc != null) 
      { 
         // change some settings 
         lmvc.Brightness = 85; 
         lmvc.Contrast = 85; 
         lmvc.Enabled = true; 
         lmvc.EffectAreaEnabled = false; 
 
         Marshal.ReleaseComObject(lmvc); 
      } 
 
      // start the convert 
      convertctrl.StartConvert(); 
   } 
   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(); 
} 
 
static class LEAD_VARS 
{ 
   public const string MediaDir = @"C:\Program Files (x86)\LEAD Technologies\LEADTOOLS 20\Media"; 
}

Imports Leadtools 
Imports Leadtools.Multimedia 
Imports LeadtoolsMultimediaExamples.Fixtures 
 
Public _result As Boolean = False 
Public _form As ConvertCtrlForm = New ConvertCtrlForm() 
 
Public Sub GetSubObjectExample() 
   ' reference the convert control 
   Dim convertctrl As 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_GetSubObjectExample.avi") 
 
   Try 
      ' set the input and output files 
      convertctrl.SourceFile = inFile 
      convertctrl.TargetFile = outFile 
 
      ' set the audio and video compression 
      convertctrl.VideoCompressors.Mpeg2.Selected = True 
      convertctrl.AudioCompressors.AC3.Selected = True 
 
      ' add the color adjustment processor 
      convertctrl.SelectedVideoProcessors.Add(convertctrl.VideoProcessors.Color) 
 
      ' access the processor directly 
      Dim lmvc As LMVColor = TryCast(convertctrl.GetSubObject(ConvertObject.SelVideoProcessor), LMVColor) 
 
      If Not lmvc Is Nothing Then 
         ' change some settings 
         lmvc.Brightness = 85 
         lmvc.Contrast = 85 
         lmvc.Enabled = True 
         lmvc.EffectAreaEnabled = False 
 
         Marshal.ReleaseComObject(lmvc) 
      End If 
 
      ' start the convert 
      convertctrl.StartConvert() 
   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 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.Multimedia Assembly

Introduction

Getting Started

Namespaces

Leadtools.Multimedia Namespace

Leadtools.Multimedia.Common Namespace

Assemblies