Leadtools.Multimedia Namespace > TVTuner Class : Channel Property |
public int Channel {get;}
'Declaration Public ReadOnly Property Channel As Integer
public int Channel {get;}
get_Channel();
For a list of frequencies for channels, see the Microsoft documentation on International Analog TV Tuning.
For more detailed information, refer to the Microsoft documentation for IAMTVTuner.get_Channel.
Public _result As Boolean = False Public _form As CaptureCtrlForm = New CaptureCtrlForm() Public Sub AnalogTVTunerExample() ' reference the forms capture control and tv tuner Dim capturectrl As CaptureCtrl = _form.CaptureCtrl Dim outFile As String = Path.Combine(LEAD_VARS.MediaDir, "TVTuner_AnalogTVTunerExample.avi") Dim testChan As Integer = 6 Dim channel As Integer Try ' select the first device with analog in it's name ' Replace "Analog" with your video capture device name If capturectrl.VideoDevices("Analog") Is Nothing Then Throw New Exception("No Analog video devices available!") End If capturectrl.VideoDevices("Analog").Selected = True ' use the video capture device's audio capturectrl.UseVideoDeviceAudio = True ' get the TV Tuner device Dim tvtuner As TVTuner = capturectrl.TVTuner ' Check if TV tuner is valid If Not tvtuner Is Nothing Then ' 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 Dim vidFreq As Integer = tvtuner.VideoFrequency Dim audFreq As Integer = tvtuner.AudioFrequency End If ' set the output file capturectrl.TargetFile = outFile ' set the video and audio compressors capturectrl.VideoCompressors.Mpeg2.Selected = True capturectrl.AudioCompressors.AC3.Selected = True ' check if we have can capture video If capturectrl.IsModeAvailable(CaptureMode.VideoAndAudio) Then ' set the target format capturectrl.TargetFormat = TargetFormatType.AVI capturectrl.TimeLimit = 10 ' just 10 seconds of capture time capturectrl.UseTimeLimit = True ' select the video subtype capturectrl.VideoCaptureSubTypes(Leadtools.Multimedia.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. Do While capturectrl.State = CaptureState.Running Application.DoEvents() Loop ' if TV tuner is valid If Not tvtuner Is Nothing Then ' check the channel channel = tvtuner.Channel ' and set the result to what we expect _result = (channel = testChan) End If End If Catch e1 As Exception _result = False End Try End Sub Public NotInheritable Class LEAD_VARS Public Const MediaDir As String = "C:\Program Files (x86)\LEAD Technologies\LEADTOOLS 175\Media"; End Class
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.avi"); 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; // use the video capture device's audio capturectrl.UseVideoDeviceAudio = true; // get the TV Tuner device TVTuner tvtuner = capturectrl.TVTuner; // check whether the 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; // set the video and audio compressors capturectrl.VideoCompressors.Mpeg2.Selected = true; capturectrl.AudioCompressors.AC3.Selected = true; // check whether we can capture video if (capturectrl.IsModeAvailable(CaptureMode.VideoAndAudio)) { // set the target format capturectrl.TargetFormat = TargetFormatType.AVI; 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:\Program Files (x86)\LEAD Technologies\LEADTOOLS 175\Media"; }
Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2