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AverageFrameSize Property

Summary

Gets the average size of the frames that have been captured.

Syntax

C#
VB
C++
public virtual int AverageFrameSize { get; } 
Public Overridable ReadOnly Property AverageFrameSize As Integer 
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

C#
VB
using Leadtools; 
using Leadtools.MediaFoundation; 
using LeadtoolsMediaFoundationExamples.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, select using your device name here 
      if (capturectrl.VideoDevices["USB"] == null) 
      { 
         throw new Exception("No USB video device available"); 
      } 
 
      capturectrl.VideoDevices["USB"].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 don't need a complete capture for this example) 
   capturectrl.StopCapture(); 
} 
 
static class LEAD_VARS 
{ 
   public const string MediaDir = @"C:\Program Files (x86)\LEAD Technologies\LEADTOOLS 19\Media"; 
} 
Imports Leadtools 
Imports Leadtools.MediaFoundation 
Imports LeadtoolsMediaFoundationExamples.Fixtures 
 
Public _result As Boolean = False 
Public _form As New CaptureCtrlForm() 
 
' capture control 
Private capturectrl As CaptureCtrl 
 
' output file 
Private outFile As String = Path.Combine(LEAD_VARS.MediaDir, "CaptureCtrl_AverageFrameSizeExample.avi") 
 
Public Sub AverageFrameSizeExample() 
   ' reference the capture control 
   capturectrl = _form.CaptureCtrl 
 
   ' average frame size 
   Dim AverageFrameSize As Integer = 0 
 
   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 
 
 
      ' 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 generatedExceptionName As COMException 
      _result = False 
   Catch generatedExceptionName As Exception 
      _result = False 
   End Try 
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 19\Media" 
End Class 

Requirements

Target Platforms

Help Version 19.0.2017.10.19
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Leadtools.MediaFoundation Assembly