LEADTOOLS Multimedia (Leadtools.Multimedia assembly)

AverageFrameSize Property

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Example 



Gets the average size of the frames that have been captured.
Syntax
'Declaration
 
Public Overridable ReadOnly Property AverageFrameSize As Integer
'Usage
 
Dim instance As CaptureCtrl
Dim value As Integer
 
value = instance.AverageFrameSize
public virtual int AverageFrameSize {get;}
public:
virtual property int AverageFrameSize {
   int get();
}

Property Value

A value representing the average frame size, in bytes, of the captured frames.
Remarks
The value is reset to zero when you start a new capture.
Example
Copy Code  
Imports Leadtools
Imports Leadtools.Multimedia
Imports LeadtoolsMultimediaExamples.Fixtures

Public _result As Boolean = False
Public _form As CaptureCtrlForm = New CaptureCtrlForm()
Public _capturectrl As CaptureCtrl
Public Sub AverageFrameSizeExample()
   ' reference the capture control
   _capturectrl = _form.CaptureCtrl

   ' output file
   Dim outFile As String = Path.Combine(LEAD_VARS.MediaDir, "CaptureCtrl_AverageFrameSizeExample.avi")

   ' average frame size
   Dim AverageFrameSize As Integer

   Try
      ' set the source video device, select using your device name here
      If _capturectrl.VideoDevices("USB") Is Nothing Then
         Throw New Exception("No USB video device available")
      End If

      _capturectrl.VideoDevices("USB").Selected = True

      ' select a video compressor
      _capturectrl.VideoCompressors.Mpeg4.Selected = True

      ' set the target output file
      _capturectrl.TargetFile = outFile

      ' subscribe to the started event
      AddHandler _capturectrl.Started, AddressOf CaptureCtrl_Started

      ' start capture
      _capturectrl.StartCapture(CaptureMode.Video)

      ' get the average frame size
      AverageFrameSize = _capturectrl.AverageFrameSize

      ' set the result to what we expect
      _result = (AverageFrameSize > 0)

   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 _capturectrl.State = CaptureState.Running
      Application.DoEvents()
   Loop
End Sub

Private Sub CaptureCtrl_Started(ByVal sender As Object, ByVal e As EventArgs)
   ' stop the capture (we don't need a complete capture for this example)
   _capturectrl.StopCapture()
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 CaptureCtrlForm _form = new CaptureCtrlForm();
// capture control
CaptureCtrl capturectrl;

// output file
string outFile = Path.Combine(LEAD_VARS.MediaDir,"CaptureCtrl_AverageFrameSizeExample.avi");

public void AverageFrameSizeExample()
{
   // reference the capture control
   capturectrl = _form.CaptureCtrl;

   // average frame size
   int AverageFrameSize = 0;

   try
   {
       // set the source video device. use your device's name here
      if (capturectrl.VideoDevices["USB"] == null)
      {
         throw new Exception("No USB video device available");
      }

      capturectrl.VideoDevices["USB"].Selected = true;

      // select a video compressor
      capturectrl.VideoCompressors.Mpeg4.Selected = true;

      // set the target output file
      capturectrl.TargetFile = outFile;

      // subscribe to the started event
      capturectrl.Started += new System.EventHandler (CaptureCtrl_Started);

      // start capture
      capturectrl.StartCapture(CaptureMode.Video);

      // get the average frame size
      AverageFrameSize = capturectrl.AverageFrameSize;

      // set the result to what we expect
      _result = (AverageFrameSize > 0);
   }
   catch (COMException)
   {
      _result = false;
   }
   catch (Exception)
   {
      _result = false;
   }
}

void CaptureCtrl_Started(object sender, EventArgs e)
{
   // stop the capture (we do not need a complete capture for this example)
   capturectrl.StopCapture();
}

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

Target Platforms

See Also

Reference

CaptureCtrl Class
CaptureCtrl Members

 

 


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Leadtools.Multimedia requires a Multimedia or Multimedia Suite license and unlock key. For more information, refer to: LEADTOOLS Toolkit Features