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VideoFrequency Property

Summary

Gets the video frequency, in Hertz, for the current channel.

Syntax

C++/CLI

public int VideoFrequency { get; }

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

Property Value

A value that represents the video frequency, in Hertz.

Remarks

Gets the video frequency, in Hertz, for the current channel. For more detailed information, refer to the Microsoft documentation for IAMTVTuner.get_VideoFrequency.

Example

using Leadtools; 
using Leadtools.MediaFoundation; 
using LeadtoolsMediaFoundationExamples.Fixtures; 
 
 
public bool _result = false; 
public CaptureCtrlForm _form = new CaptureCtrlForm(); 
 
public void AnalogTVTunerExample() 
{ 
   // reference the forms capture control and tv tuner 
   CaptureCtrl capturectrl = _form.CaptureCtrl; 
 
   string outFile = Path.Combine(LEAD_VARS.MediaDir, "TVTuner_AnalogTVTunerExample.wmv"); 
   int testChan = 6; 
   int channel; 
 
   try 
   { 
      // select the first device with analog in it's name 
      // Replace "Analog" with your video capture device name 
      if (capturectrl.VideoDevices["Analog"] == null) 
         throw new Exception("No Analog video devices available!"); 
 
      capturectrl.VideoDevices["Analog"].Selected = true; 
 
      // get the TV Tuner device 
      TVTuner tvtuner = capturectrl.TVTuner; 
 
      // Check if TV tuner is valid 
      if (tvtuner != null) 
      { 
         // set the input type to cable and set the channel 
         tvtuner.SetInputType(0, TunerInputType.Cable); 
         tvtuner.SetChannel(testChan, -1, -1); 
 
         // get the Video and Audio frequency 
         int vidFreq = tvtuner.VideoFrequency; 
         int audFreq = tvtuner.AudioFrequency; 
      } 
 
      // set the output file 
      capturectrl.TargetFile = outFile; 
 
      // check if we have can capture video 
      if (capturectrl.IsModeAvailable(CaptureMode.VideoAndAudio)) 
      { 
         // set the target format 
         capturectrl.TargetFormat = TargetFormatType.WMV; 
 
         capturectrl.TimeLimit = 10;     // just 10 seconds of capture time 
         capturectrl.UseTimeLimit = true; 
 
         // select the video subtype 
         capturectrl.VideoCaptureSubTypes[Constants.MEDIASUBTYPE_YUY2].Selected = true; 
 
         // start the capture 
         capturectrl.StartCapture(CaptureMode.VideoAndAudio); 
 
         // 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(); 
 
         // if TV tuner is valid 
         if (tvtuner != null) 
         { 
            // check the channel 
            channel = tvtuner.Channel; 
 
            // and set the result to what we expect 
            _result = (channel == testChan); 
         } 
      } 
   } 
   catch (Exception) 
   { 
      _result = false; 
   } 
} 
 
static class LEAD_VARS 
{ 
   public const string MediaDir = @"C:\LEADTOOLS22\Media"; 
}

Requirements

Target Platforms

Reference

TVTuner Class

TVTuner Members

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Help Version 22.0.2022.12.7

Leadtools.MediaFoundation Assembly

Introduction

Getting Started

Namespaces

Leadtools.MediaFoundation Namespace

Leadtools.MediaFoundation.Common Namespace

Assemblies