Overwrite Property

Gets or sets a value that indicates whether the DVD writer will delete (overwrite) the existing DVD image.

Syntax

Visual Basic
C#
C++/CLI

'Declaration
 
<DispIdAttribute(1)>
Property Overwrite As Boolean

'Usage
 
Dim instance As ILTDvdWriter
Dim value As Boolean
 
instance.Overwrite = value
 
value = instance.Overwrite

[DispIdAttribute(1)]
bool Overwrite {get; set;}

[DispIdAttribute(1)]
property bool Overwrite {
   bool get();
   void set (    bool value);
}

Property Value

True if the DVD writer will delete (overwrite) the existing DVD image at the next write operation.

False if the DVD writer will append new titles to the existing DVD image at the next write operation.

Remarks

Gets or sets a value that indicates whether the DVD writer will delete (overwrite) the existing DVD image at the next write operation.

In order to add a new title to the DVD image that has been created, overwriting must be disabled before writing the image. To disable overwriting, set this property to False before starting the next conversion.

Example

Visual Basic
C#
WinRT C#
WinRT JavaScript
Silverlight C#
Silverlight VB

Copy Code

Imports Leadtools
Imports Leadtools.Multimedia
Imports LeadtoolsMultimediaExamples.Fixtures

Public _result As Boolean = False
Public _form As ConvertCtrlForm = New ConvertCtrlForm()
Private _convertCtrl As ConvertCtrl = Nothing
Private _dvdWriter As LTDvdWriter = Nothing

Public Sub DvdWriterExample()
   ' reference the convert control
   _convertCtrl = _form.ConvertCtrl

   ' source files for DVD content
   Dim inFile1 As String = "mediafiles\input\DVDWriter_Source1.avi"
   Dim inFile2 As String = "mediafiles\input\DVDWriter_Source2.avi"
   Dim inFile3 As String = "mediafiles\input\DVDWriter_Source3.avi"
   Dim inFile4 As String = "mediafiles\input\DVDWriter_Source4.avi"
   Dim backgroundImageFile As String = "mediafiles\input\DVDWriter_Background.jpg"
   Dim outFile As String = "mediafiles\output\ConvertCtrl_DvdWriterExample_DVD"

   Try
      _dvdWriter = Nothing

      _convertCtrl.Preview = True
      _convertCtrl.PreviewVisible = True

      ' setup the converter
      _convertCtrl.TargetFormat = TargetFormatType.DVD
      _convertCtrl.VideoCompressors.Mpeg2.Selected = True
      _convertCtrl.AudioCompressors.MpegAudio.Selected = True

      ' Create a DVD image with 2 titles, each contains 2 chapters: 
      ' Source video
      _convertCtrl.SourceFile = inFile1

      ' Destination image folder
      _convertCtrl.TargetFile = outFile

      ' Retrieve the DVD Writer interface 
      _dvdWriter = TryCast(_convertCtrl.GetSubObject(ConvertObject.Sink), LTDvdWriter)

      _dvdWriter.RemoveAllMenuTitles()
      _dvdWriter.MenulessTitlePlay = False

      ' Set the TitleBreak property to false. 
      ' This will prevent the title from being written immediately after the conversion
      _dvdWriter.TitleBreak = False

      _dvdWriter.AddMenuTitle("Title 1", -1)

      ' Write the first chapter in the first title
      _convertCtrl.StartConvert()

      Do While _convertCtrl.State <> ConvertState.Stopped
         Application.DoEvents()
      Loop

      _convertCtrl.ResetSource()

      Dim highPart As Integer = 0
      Dim lowPart As Integer = _dvdWriter.GetBytesWritten(highPart)
      Dim written As Int64 = highPart << 32 Or lowPart

      _convertCtrl.SourceFile = inFile2
      _convertCtrl.StartConvert()

      Do While _convertCtrl.State <> ConvertState.Stopped
         Application.DoEvents()
      Loop

      _convertCtrl.ResetSource()

      ' Prepare for the second title
      ' Set the TitleBreak property to TRUE, so the the current title can be flushed
      _dvdWriter.TitleBreak = True

      ' Disable Overwrite so the title will be appended to an existing dvd image
      _dvdWriter.Overwrite = False
      _dvdWriter.MenulessTitlePlay = False

      ' Set the TitleBreak property to FALSE. 
      ' This will prevent the title from being written immediately after the conversion
      _dvdWriter.TitleBreak = False
      _dvdWriter.AddMenuTitle("Title 2", -1)

      ' Write the first chapter in the second title
      _convertCtrl.SourceFile = inFile3
      _convertCtrl.StartConvert()

      Do While _convertCtrl.State <> ConvertState.Stopped
         Application.DoEvents()
      Loop

      _convertCtrl.ResetSource()

      ' Write the second chapter in the second title
      _convertCtrl.SourceFile = inFile4
      _convertCtrl.StartConvert()

      Do While _convertCtrl.State <> ConvertState.Stopped
         Application.DoEvents()
      Loop

      _convertCtrl.ResetSource()

      ' Close the second title
      _dvdWriter.TitleBreak = True

      _dvdWriter.TitleMenu = True
      _dvdWriter.MenuLoop = True
      _dvdWriter.MenulessTitlePlay = False

      ' Write the second chapter in the second title
      _convertCtrl.SourceFile = backgroundImageFile
      ChangeStillImageDuration(1.0)

      _convertCtrl.StartConvert()

      Do While _convertCtrl.State <> ConvertState.Stopped
         Application.DoEvents()
      Loop

      _convertCtrl.ResetSource()

      _dvdWriter.TitleMenu = False
      _dvdWriter.Overwrite = False

      _convertCtrl.ResetTarget()
      _convertCtrl.ResetSource()

      ' done, free COM object
      Marshal.ReleaseComObject(_dvdWriter)
      _dvdWriter = Nothing

      ' set the result 
      _result = True
   Catch ex As Exception
      _result = False
   End Try
End Sub

Private Sub ChangeStillImageDuration(ByVal duration As Double)
   Dim pStlImgRd As ILTStlImgRd

   Try
      pStlImgRd = TryCast(_convertCtrl.GetSubObject(ConvertObject.SourceFilter), ILTStlImgRd)
      If Not pStlImgRd Is Nothing Then
         ' get the current menu duration
         Dim currentDuration As Double
         currentDuration = _convertCtrl.Duration

         If currentDuration * 2 <= duration Then
            pStlImgRd.Loop = CInt(duration / currentDuration + 0.5)
         End If
      End If
   Catch
   End Try
End Sub

using Leadtools;
using Leadtools.Multimedia;
using LeadtoolsMultimediaExamples.Fixtures;

public bool _result = false;
public ConvertCtrlForm _form = new ConvertCtrlForm();
private ConvertCtrl _convertCtrl = null;
private LTDvdWriter _dvdWriter = null;

public void DvdWriterExample()
{
   // reference the convert control
   _convertCtrl = _form.ConvertCtrl;

   // source files for DVD content
   string inFile1 = Path.Combine(LEAD_VARS.MediaDir,"DVDWriter_Source1.avi");
   string inFile2 = Path.Combine(LEAD_VARS.MediaDir,"DVDWriter_Source2.avi");
   string inFile3 = Path.Combine(LEAD_VARS.MediaDir,"DVDWriter_Source3.avi");
   string inFile4 = Path.Combine(LEAD_VARS.MediaDir,"DVDWriter_Source4.avi");
   string backgroundImageFile = Path.Combine(LEAD_VARS.MediaDir,"DVDWriter_Background.jpg");
   string outFile = Path.Combine(LEAD_VARS.MediaDir,"ConvertCtrl_DvdWriterExample_DVD");

   try
   {
      _dvdWriter = null;

      _convertCtrl.Preview = true;
      _convertCtrl.PreviewVisible = true;

      // setup the converter
      _convertCtrl.TargetFormat = TargetFormatType.DVD;
      _convertCtrl.VideoCompressors.Mpeg2.Selected = true;
      _convertCtrl.AudioCompressors.MpegAudio.Selected = true;

      // Create a DVD image with 2 titles, each contains 2 chapters: 
      // Source video
      _convertCtrl.SourceFile = inFile1;

      // Destination image folder
      _convertCtrl.TargetFile = outFile;

      // Retrieve the DVD Writer interface 
      _dvdWriter = _convertCtrl.GetSubObject(ConvertObject.Sink) as LTDvdWriter;

      _dvdWriter.RemoveAllMenuTitles();
      _dvdWriter.MenulessTitlePlay = false;

      // Set the TitleBreak property to false. 
      // This will prevent the title from being written immediately after the conversion
      _dvdWriter.TitleBreak = false;

      _dvdWriter.AddMenuTitle("Title 1", -1);

      // Write the first chapter in the first title
      _convertCtrl.StartConvert();

      while (_convertCtrl.State != ConvertState.Stopped)
         Application.DoEvents();

      _convertCtrl.ResetSource();

      int highPart = 0;
      int lowPart = _dvdWriter.GetBytesWritten(out highPart);
      Int64 written = highPart << 32 | lowPart;

      _convertCtrl.SourceFile = inFile2;
      _convertCtrl.StartConvert();

      while (_convertCtrl.State != ConvertState.Stopped)
         Application.DoEvents();

      _convertCtrl.ResetSource();

      // Prepare for the second title
      // Set the TitleBreak property to TRUE, so the the current title can be flushed
      _dvdWriter.TitleBreak = true;

      // Disable Overwrite so the title will be appended to an existing dvd image
      _dvdWriter.Overwrite = false;
      _dvdWriter.MenulessTitlePlay = false;

      // Set the TitleBreak property to FALSE. 
      // This will prevent the title from being written immediately after the conversion
      _dvdWriter.TitleBreak = false;
      _dvdWriter.AddMenuTitle("Title 2", -1);

      // Write the first chapter in the second title
      _convertCtrl.SourceFile = inFile3;
      _convertCtrl.StartConvert();

      while (_convertCtrl.State != ConvertState.Stopped)
         Application.DoEvents();

      _convertCtrl.ResetSource();

      // Write the second chapter in the second title
      _convertCtrl.SourceFile = inFile4;
      _convertCtrl.StartConvert();

      while (_convertCtrl.State != ConvertState.Stopped)
         Application.DoEvents();

      _convertCtrl.ResetSource();

      // Close the second title
      _dvdWriter.TitleBreak = true;

      _dvdWriter.TitleMenu = true;
      _dvdWriter.MenuLoop = true;
      _dvdWriter.MenulessTitlePlay = false;

      // Write the second chapter in the second title
      _convertCtrl.SourceFile = backgroundImageFile;
      ChangeStillImageDuration(1.0);

      _convertCtrl.StartConvert();

      while (_convertCtrl.State != ConvertState.Stopped)
         Application.DoEvents();

      _convertCtrl.ResetSource();

      _dvdWriter.TitleMenu = false;
      _dvdWriter.Overwrite = false;

      _convertCtrl.ResetTarget();
      _convertCtrl.ResetSource();

      // done, free COM object
      Marshal.ReleaseComObject(_dvdWriter);
      _dvdWriter = null;

      // set the result 
      _result = true;
   }
   catch (Exception ex)
   {
      _result = false;
   }
}

private void ChangeStillImageDuration(double duration)
{
   ILTStlImgRd pStlImgRd;

   try
   {
      pStlImgRd = _convertCtrl.GetSubObject(ConvertObject.SourceFilter) as ILTStlImgRd;
      if (pStlImgRd != null)
      {
         // get the current menu duration
         double currentDuration;
         currentDuration = _convertCtrl.Duration;

         if (currentDuration * 2 <= duration)
            pStlImgRd.Loop = (int)(duration / currentDuration + 0.5);
      }
   }
   catch
   {
   }
}

static class LEAD_VARS
{
public const string MediaDir = @"C:\Program Files (x86)\LEAD Technologies\LEADTOOLS 18\Media";
}

Requirements

Target Platforms

Reference

ILTDvdWriter Interface
ILTDvdWriter Members