Creating a MediaFoundation Capture Application

Take the following steps to create and run a multimedia capture application using the LEADTOOLS Media Foundation CaptureCtrl control.

Start Visual Studio .NET.
Choose File->New->Project... from the menu.
In the New Project dialog box, choose either "Visual C# Projects" or "VB Projects" in the Projects Type List, and choose "Windows Application " in the Templates List.
Type the project name as "Multimedia Capture" in the Project Name field, and then choose OK. If desired, type a new location for your project or select a directory using the Browse button, and then choose OK.
In the "Solution Explorer" window, right-click on the "References" folder, and select "Add Reference..." from the context menu. In the "Add Reference" dialog box, select the ".NET" tab and select Leadtools.MediaFoundation and click OK. If this DLL does not appear under the .NET tab, you will need select the Browse tab and add it from the "<LEADTOOLS_INSTALLDIR>\Bin\Dotnet\Win32 " folder, by selecting the following DLL:
- Leadtools.MediaFoundation.dll
After browsing, click the Select button and then press the OK button to add the above DLL to the application.

Make sure Form1 is in design view. Go to the toolbox (View->Toolbox) and drag and drop a CaptureCtrl control on the form. NOTE: If you do not have CaptureCtrl in your toolbox, select Tools->Choose Toolbox Items from the menu. Click Browse and then select Leadtools.MediaFoundation.dll from "<LEADTOOLS_INSTALLDIR>\Bin\Dotnet\Win32" and then click Open and then click OK. After adding it to the form, set the following properties on the capture control:

Property	Value
Name	_capturectrl
Anchor	Top, Bottom, Left, Right

Go to the toolbox (View->Toolbox) and drag and drop a ProgressBar control on the form (below the capture control) and set the following properties:

Property Value

Name _progress

Anchor Bottom, Left, Right

Property	Value
Name	_progress
Anchor	Bottom, Left, Right

Go to the toolbox (View->Toolbox) and drag and drop a Button control on the bottom of the form and set the following properties:

Property	Value
Name	_buttonCapture
Text	Capture
Anchor	Bottom, Right

Switch Form1 to code view (right-click Form1 in the solution explorer then select View Code) and add the following lines at the beginning of the file:

Imports Leadtools.MediaFoundation

using Leadtools.MediaFoundation;

Declare the following private variables:

Private _targetFile As String 
Private _captureTime As Integer

private string _targetFile; 
private int _captureTime;

Add an event handler to the Form1 Load event and code it as follows:

Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load 
   If (_capturectrl.VideoDevices.Count = 0) Then 
      Throw New Exception("No capture devices available") 
   End If 
                       
   _capturectrl.VideoDevices(0).Selected = True 
   _capturectrl.TargetFormats.Selection = TargetFormatType.MP4    
   Dim trgvideoformats As TargetVideoFormats = _capturectrl.TargetFormats(TargetFormatType.MP4).VideoFormats 
   targetvideoformats.Selection = targetvideoformats.IndexOf("{34363248-0000-0010-8000-00AA00389B71}") ' // H264 
                    
   _targetFile = "capture.mp4" 
   _captureTime = 30 
End Sub

private void Form1_Load(object sender, System.EventArgs e) 
{ 
   if (_capturectrl.VideoDevices.Count == 0) 
      throw new Exception("No capture devices available"); 
                       
   _capturectrl.VideoDevices[0].Selected = true; 
   _capturectrl.TargetFormats.Selection = (int)TargetFormatType.MP4; 
   TargetVideoFormats targetvideoformats = _capturectrl.TargetFormats[TargetFormatType.MP4].VideoFormats; 
   targetvideoformats.Selection = targetvideoformats.IndexOf("{34363248-0000-0010-8000-00AA00389B71}");// H264 
                    
   _targetFile = "capture.mp4"; 
   _captureTime = 30; 
}

Add an event handler to the _capturectrl Progress event and code it as follows:

Private Sub _capturectrl_Progress(ByVal sender As System.Object, ByVal e As ProgressEventArgs) Handles _capturectrl.Progress 
   _progress.Value = CInt((_progress.Maximum * e.time) / (_captureTime * 1000)) 
End Sub

private void _capturectrl_Progress(object sender, ProgressEventArgs e) 
{ 
   _progress.Value = (int)((_progress.Maximum * e.time) / (_captureTime * 1000)); 
}

Add an event handler to the _capturectrl Complete event and code it as follows:

Private Sub _capturectrl_Complete(ByVal sender As System.Object, ByVal e As EventArgs) Handles _capturectrl.Complete 
   MessageBox.Show("Capture Complete") 
   _buttonCapture.Enabled = True 
End Sub

private void _capturectrl_Complete(object sender, EventArgs e) 
{ 
   MessageBox.Show("Capture Complete"); 
   _buttonCapture.Enabled = true; 
}

Add an event handler to the _buttonCapture Click event and code it as follows:

Private Sub _buttonCapture_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles _buttonCapture.Click 
   Try 
      _capturectrl.Preview = True 
      _capturectrl.TargetFile = _targetFile 
      _capturectrl.UseTimeLimit = True 
      _capturectrl.TimeLimit = _captureTime 
                       
      _capturectrl.StartCapture(CaptureMode.Video) 
      _buttonCapture.Enabled = False 
   Catch ex As Exception 
      MessageBox.Show(ex.Message) 
   End Try 
End Sub

private void _buttonCapture_Click(object sender, System.EventArgs e) 
{ 
   try 
   { 
      _capturectrl.Preview = true; 
      _capturectrl.TargetFile = _targetFile; 
      _capturectrl.UseTimeLimit = true; 
      _capturectrl.TimeLimit = _captureTime; 
                       
      _capturectrl.StartCapture(CaptureMode.Video); 
      _buttonCapture.Enabled = false; 
   } 
   catch (Exception ex) 
   { 
      MessageBox.Show(ex.Message); 
   } 
}