VideoSubChannelCount Property

Visual Basic
C#
C++/CLI

'Declaration
 
Public ReadOnly Property VideoSubChannelCount As Integer

'Usage
 
Dim instance As TVTuner
Dim value As Integer
 
value = instance.VideoSubChannelCount

public int VideoSubChannelCount {get;}

public:
property int VideoSubChannelCount {
   int get();
}

Property Value

A value representing the video subchannel count.

Gets the video subchannel count for a multifunction tuner. This property is valid only for ATSC digital TV broadcasts.

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 AudioSubChannelCountExample()
   ' reference the forms capture control and tv tuner
   Dim capturectrl As CaptureCtrl = _form.CaptureCtrl

   Try
      ' select the first device with analog in it's name
      ' Replace "Analog" with your video capture device name
      If capturectrl.VideoDevices("Digital") Is Nothing Then
         Throw New Exception("No Digital video devices available!")
      End If

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

      ' get the TV Tuner device
      Dim tvtuner As TVTuner = capturectrl.TVTuner

      ' Check if TV tuner is valid
      If Not tvtuner Is Nothing Then
         ' try to set the channel and check the subchannel countss
         tvtuner.SetChannel(101, -1, -1)
         Dim videoSubChannelCount As Integer = tvtuner.VideoSubChannelCount
         Dim audioSubChannelCount As Integer = tvtuner.AudioSubChannelCount

         ' set the result
         _result = True
      End If
   Catch e1 As Exception
      _result = False
   End Try

   ' we'll loop on the state and pump messages for this example.
   ' but you should not need to if running from a Windows Forms application.
   Do While capturectrl.State = CaptureState.Running
      Application.DoEvents()
   Loop
End Sub

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

public bool _result = false;
public CaptureCtrlForm _form = new CaptureCtrlForm();
public void AudioSubChannelCountExample()
{
   // reference the forms capture control and tv tuner
   CaptureCtrl capturectrl = _form.CaptureCtrl;

   try
   {
      // select the first device with analog in it's name
      // Replace "Analog" with your video capture device name
      if (capturectrl.VideoDevices["Digital"] == null)
         throw new Exception("No Digital video devices available!");

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

      // get the TV Tuner device
      TVTuner tvtuner = capturectrl.TVTuner;

      // Check if TV tuner is valid
      if (tvtuner != null)
      {
         // try to set the channel and check the subchannel countss
         tvtuner.SetChannel(101, -1, -1);
         int videoSubChannelCount = tvtuner.VideoSubChannelCount;
         int audioSubChannelCount = tvtuner.AudioSubChannelCount;

         // set the result
         _result = true;
      }
   }
   catch (Exception)
   {
      _result = false;
   }

   // we'll loop on the state and pump messages for this example.
   // but you should not need to if running from a Windows Forms application.
   while (capturectrl.State == CaptureState.Running)
      Application.DoEvents();
}

Target Platforms

Reference

TVTuner Class
TVTuner Members