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VideoSubChannelCount Property

Summary

Gets the video subchannel count for a multifunction tuner.

Syntax

C++

public int VideoSubChannelCount { get; }

Public ReadOnly Property VideoSubChannelCount As Integer

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

Property Value

A value representing the video subchannel count.

Remarks

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

Example

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(); 
}

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

Requirements

Target Platforms

Reference

TVTuner Class

TVTuner Members

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Help Version 21.0.2021.7.2

Leadtools.MediaFoundation Assembly

Introduction

Getting Started

Namespaces

Leadtools.MediaFoundation Namespace

Leadtools.MediaFoundation.Common Namespace

Assemblies