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AutoTune Method

Summary

Fine tunes the specified channel by scanning for the most precise signal for that channel.

Syntax

C++/CLI

public int AutoTune( 
   int Channel 
)

public: 
int AutoTune(  
   int Channel 
)

Parameters

Channel
Channel number for which to scan.

Return Value

nonzero indicates found, zero indicates not found

Remarks

Fine tunes the specified channel by scanning for the most precise signal for that channel. This method maps the TV channel to a frequency and searches for the most precise frequency for this channel in the area. Calling this method for every channel in a region or country allows you to create a table of channel and frequency information. Once all channels in the region or country have been scanned, use StoreAutoTune to save the channel information. For more detailed information, refer to the Microsoft documentation for IAMTVTuner.AutoTune.

Example

using Leadtools; 
using Leadtools.MediaFoundation; 
using LeadtoolsMediaFoundationExamples.Fixtures; 
 
 
public bool _result = false; 
public CaptureCtrlForm _form = new CaptureCtrlForm(); 
 
public void AutoTuneExample() 
{ 
   // reference the capture control 
   CaptureCtrl capturectrl = _form.CaptureCtrl; 
 
   try 
   { 
      // try set the analog video capture device, use your device name here 
      if (capturectrl.VideoDevices["Analog"] != null) 
         capturectrl.VideoDevices["Analog"].Selected = true; 
 
      // reference the TV tuner interface 
      TVTuner tvtuner = capturectrl.TVTuner; 
 
      // Check if TV tuner is valid 
      if (tvtuner != null) 
      { 
         // get the min and max channel info 
         int minChan = tvtuner.ChannelMin; 
         int maxChan = tvtuner.ChannelMax; 
 
         // select a channel between min and max to auto tune, do this for as many channels as desired 
         int tuneChan = 25; 
         int ok = tvtuner.AutoTune(tuneChan); 
 
         // if we auto-tuned successfully, store the info 
         if (ok != 0) 
         { 
            // store the auto tune information 
            tvtuner.StoreAutoTune(); 
            // set the result to what we expect 
            _result = true; 
         } 
      } 
   } 
   catch (Exception) 
   { 
      _result = false; 
   } 
}

Requirements

Target Platforms

Reference

TVTuner Class

TVTuner Members

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Help Version 22.0.2022.12.7

Leadtools.MediaFoundation Assembly

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Leadtools.MediaFoundation Namespace

Leadtools.MediaFoundation.Common Namespace

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