Selection Property (Compressors)

Visual Basic
C#
WinRT C#
WinRT JavaScript
C++

public int Selection {get; set;}

'Declaration
 
Public Property Selection As Integer

'Usage
 
Dim instance As Compressors
Dim value As Integer
 
instance.Selection = value
 
value = instance.Selection

public int Selection {get; set;}

 get_Selection();
 set_Selection(value);

public:
property int Selection {
   int get();
   void set (    int value);
}

Property Value

The zero-based index of the selected item; or -1 if no item is selected.

Playing audio or video data requires a decompressor. Note: For MPEG2 streams containing H.264 or AAC encoded data, LEAD H264 or LEAD AAC transcoders may be used to convert to ISO.

Assignment could raise an error exception. For more information, refer to the Error Codes.

Visual Basic
C#
WinRT C#
WinRT JavaScript
Silverlight C#
Silverlight VB

Copy Code

Public _result As Boolean = False
Public _form As CaptureCtrlForm = New CaptureCtrlForm()
Public Sub CompressorsExample()
  Dim inputName, inputFriendlyName As String
  Dim selection As Integer

  ' reference the capture control
  Dim capturectrl As CaptureCtrl = _form.CaptureCtrl

  ' select a video device, use your device name here instead of Analog
  If capturectrl.VideoDevices("Analog") Is Nothing Then
     Throw New Exception("No Analog video tuner device available")
  End If

  capturectrl.VideoDevices("Analog").Selected = True

  ' get the video compressors object
  Dim compressors As VideoCompressors = capturectrl.VideoCompressors

  Try
     ' select an input by name if possible
     If Not compressors.Mpeg2 Is Nothing Then
       compressors.Mpeg2.Selected = True
     End If

     ' get the current selected input
     selection = compressors.Selection

     For Each cmp As Compressor In compressors
       ' get the compressor properties
       inputName = cmp.Name
       inputFriendlyName = cmp.FriendlyName
       Dim rel As CompressorReliability = cmp.Reliability

       ' if we found the video tuner input
       If inputFriendlyName = "LEAD H264 Encoder (4.0)" AndAlso rel = CompressorReliability.Stable Then
         ' select it and break
         cmp.Selected = True
         Exit For
       End If
     Next cmp

     ' set the result to what we expect
     _result = (selection <> compressors.Selection)

  Catch e1 As Exception
     _result = False
  End Try
End Sub

public bool _result = false;
public CaptureCtrlForm _form = new CaptureCtrlForm();
public void CompressorsExample()
{
   string inputName, inputFriendlyName;
   int selection;

   // reference the capture control
   CaptureCtrl capturectrl = _form.CaptureCtrl;

   // select a video device, use your device's name here instead of Analog
   if (capturectrl.VideoDevices["Analog"] == null)
      throw new Exception("No Analog video tuner device available");

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

   // get the video compressors object
   VideoCompressors compressors = capturectrl.VideoCompressors;

   try
   {
      // select an input by name if possible
      if (compressors.Mpeg2 != null)
         compressors.Mpeg2.Selected = true;

      // get the current selected input
      selection = compressors.Selection;

      foreach (Compressor cmp in compressors)
      {
         // get the compressor properties
         inputName = cmp.Name;
         inputFriendlyName = cmp.FriendlyName;
         CompressorReliability rel = cmp.Reliability;

         // if we found the video tuner input
         if (inputFriendlyName == "LEAD H264 Encoder (4.0)"
            && rel == CompressorReliability.Stable)
         {
            // select it and break
            cmp.Selected = true;
            break;
         }
      }

      // set the result to what we expect
      _result = (selection != compressors.Selection);

   }
   catch (Exception)
   {
      _result = false;
   }
}

Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

Reference

Compressors Class
Compressors Members