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AudioSubChannel Property

Summary

Gets the currently set audio subchannel.

Syntax

C++/CLI

public int AudioSubChannel { get; }

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

Property Value

A TunerSubChannel enumeration value if default or not tuned; otherwise the current audio subchannel. For a list of frequencies for channels, refer to the Microsoft documentation on International Analog TV Tuning.

Remarks

Gets the currently set audio subchannel. This property is valid only for ATSC digital TV broadcasts.

Example

using Leadtools; 
using Leadtools.MediaFoundation; 
using LeadtoolsMediaFoundationExamples.Fixtures; 
 
 
public void AudioSubChannelValueExample() 
{ 
   // reference the capture control 
   CaptureCtrl capturectrl = _form.CaptureCtrl; 
 
   // output file 
   string outFile = Path.Combine(LEAD_VARS.MediaDir, "TVTuner_AudioSubChannelValueExample.avi"); 
 
   try 
   { 
      int channel = 6; 
 
      // try set the digital video capture device 
      if (capturectrl.VideoDevices["Analog"] != null) 
         capturectrl.VideoDevices["Analog"].Selected = true; 
 
      // reference the TV Tuner 
      TVTuner tvtuner = capturectrl.TVTuner; 
 
      // Check if TV tuner is valid 
      if (tvtuner != null) 
      { 
         tvtuner.SetInputType(0, TunerInputType.Antenna); 
         tvtuner.SetChannel(channel, -1, -1); 
      } 
 
      // get the current sub channel 
      int audioSubChannel = tvtuner.AudioSubChannel; 
 
      // set the result to what we expect 
      _result = (audioSubChannel == -1); 
   } 
   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(); 
} 
 
static class LEAD_VARS 
{ 
   public const string MediaDir = @"C:\LEADTOOLS23\Media"; 
}

Requirements

Target Platforms

Reference

TVTuner Class

TVTuner Members

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Help Version 23.0.2024.7.13

Leadtools.MediaFoundation Assembly

Introduction

Getting Started

Namespaces

Leadtools.MediaFoundation Namespace

Leadtools.MediaFoundation.Common Namespace

Assemblies