VideoCaptureSubTypes Property

Visual Basic
C#
C++/CLI

'Declaration
 
Public Overridable ReadOnly Property VideoCaptureSubTypes As CaptureSubTypes

'Usage
 
Dim instance As CaptureCtrl
Dim value As CaptureSubTypes
 
value = instance.VideoCaptureSubTypes

public virtual CaptureSubTypes VideoCaptureSubTypes {get;}

public:
virtual property CaptureSubTypes^ VideoCaptureSubTypes {
   CaptureSubTypes^ get();
}

Property Value

A CaptureSubTypes collection containing video capture subtypes.

The CaptureSubTypes object is used to enumerate through the available video capture subtypes and to select a subtype for capture.

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

Copy Code

Imports Leadtools
Imports Leadtools.MediaFoundation
Imports LeadtoolsMediaFoundationExamples.Fixtures

Public _result As Boolean = False
Public _form As CaptureCtrlForm = New CaptureCtrlForm()
Public Sub CaptureSubTypesExample()
   Dim name, friendlyName 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 audio inputs object
   Dim subTypes As CaptureSubTypes = capturectrl.VideoCaptureSubTypes

   ' save the current subtype selection
   selection = subTypes.Selection

   Try
      ' select an capture subtype by name for MPEG2Video if available
      If Not subTypes(Leadtools.MediaFoundation.Constants.MEDIASUBTYPE_MPEG2Video) Is Nothing Then
         subTypes(Leadtools.MediaFoundation.Constants.MEDIASUBTYPE_MPEG2Video).Selected = True
      Else ' else try YUY2
         If Not subTypes(Leadtools.MediaFoundation.Constants.MEDIASUBTYPE_YUY2) Is Nothing Then
            subTypes(Leadtools.MediaFoundation.Constants.MEDIASUBTYPE_YUY2).Selected = True
         End If
      End If

      For Each cst As CaptureSubType In subTypes
         ' get the subtype properties
         name = cst.Name
         friendlyName = cst.FriendlyName

         ' if we found the video tuner input
         If friendlyName = "YUY2" Then
            ' select it and break
            cst.Selected = True
            Exit For
         End If
      Next cst

      ' set the result to what we expect
      _result = (selection = subTypes.Selection)

   Catch e1 As Exception
      _result = False
   End Try
End Sub

using Leadtools;
using Leadtools.MediaFoundation;
using LeadtoolsMediaFoundationExamples.Fixtures;

public bool _result = false;
public CaptureCtrlForm _form = new CaptureCtrlForm();
public void CaptureSubTypesExample()
{
   string name, friendlyName;
   int selection;

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

   // select a video device, use your device 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 audio inputs object
   CaptureSubTypes subTypes = capturectrl.VideoCaptureSubTypes;

   // save the current subtype selection
   selection = subTypes.Selection;

   try
   {
      // select an capture subtype by name for MPEG2Video if available
      if (subTypes[Constants.MEDIASUBTYPE_MPEG2Video] != null)
      {
         subTypes[Constants.MEDIASUBTYPE_MPEG2Video].Selected = true;
      }
      else // else try YUY2
      if (subTypes[Constants.MEDIASUBTYPE_YUY2] != null)
      {
         subTypes[Constants.MEDIASUBTYPE_YUY2].Selected = true;
      }

      foreach (CaptureSubType cst in subTypes)
      {
         // get the subtype properties
         name = cst.Name;
         friendlyName = cst.FriendlyName;

         // if we found the video tuner input
         if (friendlyName == "YUY2")
         {
            // select it and break
            cst.Selected = true;
            break;
         }
      }

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

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

Target Platforms

Reference

CaptureCtrl Class
CaptureCtrl Members