StillCaptureLimit Property

Visual Basic
C#
C++/CLI

'Declaration
 
Public Overridable Property StillCaptureLimit As Integer

'Usage
 
Dim instance As ConvertCtrl
Dim value As Integer
 
instance.StillCaptureLimit = value
 
value = instance.StillCaptureLimit

public virtual int StillCaptureLimit {get; set;}

public:
virtual property int StillCaptureLimit {
   int get();
   void set (    int value);
}

Property Value

A value representing the time limit for still capture, in milliseconds.

The time limit is the time after which no frames can be captured. For example, if this property value is set to be 5000ms, no frames can be captured after 5 seconds into the conversion. When setting a value for this property, if the media samples' time exceeds this value then calling the SaveStillBitmap method will return the last, previously captured image (old). The default value is 1000 milliseconds. Use the EnableStillCapture property to indicate whether still images can be captured during conversion. Use the SaveStillBitmap method to save a snapshot from the running stream to a file as a bitmap.

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()
Public _convertctrl As ConvertCtrl = Nothing
Public _bmpFile As String = Path.Combine(LEAD_VARS.MediaDir, "ConvertCtrl_SaveStillBitmap.bmp")
Public Sub SaveStillBitmapExample()
   ' input and output file names
   Dim inFile As String = Path.Combine(LEAD_VARS.MediaDir, "ConvertCtrl_Source.avi")
   Dim outFile As String = Path.Combine(LEAD_VARS.MediaDir, "ConvertCtrl_SaveStillBitmapExample.mpg")

   Try
      ' reference the convert control
      _convertctrl = _form.ConvertCtrl

      ' set a timer on the form to make the still bitmap
      _form.TestTimer.Interval = 5000
      AddHandler _form.TestTimer.Tick, AddressOf SaveStillBitmap_Helper

      ' enable still capture
      _convertctrl.EnableStillCapture = True

      ' set the time window limit for capture of stills (ms)
      _convertctrl.StillCaptureLimit = 100000

      ' set the compressor to DVVideo
      _convertctrl.VideoCompressors.DVVideo.Selected = True

      ' set the source and target files
      _convertctrl.SourceFile = inFile
      _convertctrl.TargetFile = outFile

      ' convert it now!
      _convertctrl.StartConvert()

      ' now start the test timer for the still capture
      _form.TestTimer.Start()
   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 SaveStillBitmap_Helper(ByVal sender As Object, ByVal e As EventArgs)
   ' cancel the timer
   _form.TestTimer.Stop()

   ' try to simulate an error condition
   _convertctrl.SaveStillBitmap(_bmpFile, StillFormatType.BMP, 0, 0, -1)

   ' check for the capture file and set the result
   If File.Exists(Path.Combine(Directory.GetCurrentDirectory(), _bmpFile)) Then
      _result = True
   End If
End Sub

Public NotInheritable Class LEAD_VARS
Public Const MediaDir As String = "C:\Program Files (x86)\LEAD Technologies\LEADTOOLS 18\Media"
End Class

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

public bool _result = false;
public ConvertCtrlForm _form = new ConvertCtrlForm();
public ConvertCtrl _convertctrl = null;
public string _bmpFile = Path.Combine(LEAD_VARS.MediaDir,"ConvertCtrl_SaveStillBitmap.bmp");
public void SaveStillBitmapExample()
{
   // input and output file names
   string inFile = Path.Combine(LEAD_VARS.MediaDir,"ConvertCtrl_Source.avi");
   string outFile = Path.Combine(LEAD_VARS.MediaDir,"ConvertCtrl_SaveStillBitmapExample.mpg");

   try
   {
      // reference the convert control
      _convertctrl = _form.ConvertCtrl;

      // set a timer on the form to make the still bitmap
      _form.TestTimer.Interval = 5000;
      _form.TestTimer.Tick += new EventHandler(SaveStillBitmap_Helper);

      // enable still capture
      _convertctrl.EnableStillCapture = true;

      // set the time window limit for capture of stills (ms)
      _convertctrl.StillCaptureLimit = 100000;

      // set the compressor to DVVideo
      _convertctrl.VideoCompressors.DVVideo.Selected = true;

      // set the source and target files
      _convertctrl.SourceFile = inFile;
      _convertctrl.TargetFile = outFile;

      // convert it now!
      _convertctrl.StartConvert();

      // now start the test timer for the still capture
      _form.TestTimer.Start();
   }
   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 SaveStillBitmap_Helper(object sender, EventArgs e)
{
   // cancel the timer
   _form.TestTimer.Stop();

   // try to simulate an error condition
   _convertctrl.SaveStillBitmap(_bmpFile, StillFormatType.BMP, 0, 0, -1);

   // check for the capture file and set the result
   if (File.Exists(Path.Combine(Directory.GetCurrentDirectory(), _bmpFile)))
      _result = true;
}

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

Target Platforms

Reference

ConvertCtrl Class
ConvertCtrl Members