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StillCaptureLimit Property

Summary

Gets or sets the time limit for capturing a still image, in milliseconds.

Syntax

C++

public virtual int StillCaptureLimit { get; set; }

Public Overridable Property StillCaptureLimit As Integer

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

Property Value

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

Remarks

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.

Example

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 19\Media"; 
}

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 19\Media" 
End Class

Requirements

Target Platforms

Reference

ConvertCtrl Class

ConvertCtrl Members

Help Version 19.0.2017.10.27

Leadtools.Multimedia Assembly

Introduction

Getting Started

Namespaces

Leadtools.Multimedia Namespace

Leadtools.Multimedia.Common Namespace

Assemblies