LEADTOOLS Multimedia (Leadtools.MediaFoundation assembly)

DroppedFrames Property

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Example 



Gets the total number of frames that have been dropped during capture.
Syntax
'Declaration
 
Public Overridable ReadOnly Property DroppedFrames As Integer
'Usage
 
Dim instance As CaptureCtrl
Dim value As Integer
 
value = instance.DroppedFrames
public virtual int DroppedFrames {get;}
public:
virtual property int DroppedFrames {
   int get();
}

Property Value

A value representing the number of dropped frames.
Remarks
The value is reset to zero when a new capture begins.
Example
Copy Code  
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_DroppedFramesExample.avi")

Public Sub DroppedFramesExample()
    ' reference the capture control
    capturectrl = _form.CaptureCtrl

    ' dropped frames
    Dim DroppedFrames 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


        ' 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 dropped frames
        DroppedFrames = capturectrl.DroppedFrames

        ' set the result to what we expect
        _result = (DroppedFrames >= 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 18\Media"
End Class
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_DroppedFramesExample.avi");

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

   // dropped frames
   int DroppedFrames;

   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 dropped frames
      DroppedFrames = capturectrl.DroppedFrames;

      // set the result to what we expect
      _result = (DroppedFrames >= 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 18\Media";
}
Requirements

Target Platforms

See Also

Reference

CaptureCtrl Class
CaptureCtrl Members

 

 


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