Gets or sets a value that indicates whether closed captioning is previewed.
public virtual bool PreviewingClosedCaption { get; }
Public Overridable ReadOnly Property PreviewingClosedCaption As Boolean
public:
virtual property bool PreviewingClosedCaption {
bool get();
}
true if Closed Captioning is previewed; false, otherwise.
using Leadtools;
using Leadtools.Multimedia;
using LeadtoolsMultimediaExamples.Fixtures;
public bool _result = false;
public CaptureCtrlForm _form = new CaptureCtrlForm();
public CaptureCtrl _capturectrl;
public void ClosedCaptioningExample()
{
// reference the capture control
_capturectrl = _form.CaptureCtrl;
// output file names
string outFile = Path.Combine(LEAD_VARS.MediaDir, "CaptureCtrl_ClosedCaptioningExample_DVD");
try
{
// try to find a Digital tuner, use your device name here
if (_capturectrl.VideoDevices["Analog"] == null)
throw new Exception("No Analog video device available");
_capturectrl.VideoDevices["Analog"].Selected = true;
// select video and audio compressors
_capturectrl.VideoCompressors.Mpeg2.Selected = true;
_capturectrl.AudioCompressors.AC3.Selected = true;
// set the target format to MPEG2 program
_capturectrl.TargetFormat = TargetFormatType.MPEG2Program;
if (_capturectrl.HasDialog(CaptureDlg.TargetFormat))
_capturectrl.ShowDialog(CaptureDlg.TargetFormat, _form);
// tune to a channel with closed captions
_capturectrl.TVTuner.SetChannel(28, -1, -1);
// set the target file
_capturectrl.TargetFile = outFile;
// enable the preview
_capturectrl.Preview = true;
// check whether closed captioning is enabled
if (_capturectrl.ClosedCaptionAvailable
&& _capturectrl.ClosedCaptioning == false)
{
// try to toggle closed captioning
_capturectrl.ToggleClosedCaptioning();
// set the result to what we expect
if (_capturectrl.ClosedCaptioning)
_result = true;
// get the previewing cc state
bool _previewCC = _capturectrl.PreviewingClosedCaption;
}
// check whether we can capture video
if (_capturectrl.IsModeAvailable(CaptureMode.VideoAndAudio))
{
_capturectrl.TimeLimit = 30; // just 30 seconds of capture time
_capturectrl.UseTimeLimit = true;
// start the capture process
_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();
_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();
}
static class LEAD_VARS
{
public const string MediaDir = @"C:\Program Files (x86)\LEAD Technologies\LEADTOOLS 20\Media";
}
Imports Leadtools
Imports Leadtools.Multimedia
Imports LeadtoolsMultimediaExamples.Fixtures
Public _result As Boolean = False
Public _form As CaptureCtrlForm = New CaptureCtrlForm()
Public _capturectrl As CaptureCtrl
Public Sub ClosedCaptioningExample()
' reference the capture control
_capturectrl = _form.CaptureCtrl
' output file names
Dim outFile As String = Path.Combine(LEAD_VARS.MediaDir, "CaptureCtrl_ClosedCaptioningExample_DVD")
Try
' try to find a Digital tuner, use your device name here
If _capturectrl.VideoDevices("Analog") Is Nothing Then
Throw New Exception("No Analog video device available")
End If
_capturectrl.VideoDevices("Analog").Selected = True
' select video and audio compressors
_capturectrl.VideoCompressors.Mpeg2.Selected = True
_capturectrl.AudioCompressors.AC3.Selected = True
' set the target format to MPEG2 program
_capturectrl.TargetFormat = TargetFormatType.MPEG2Program
If _capturectrl.HasDialog(CaptureDlg.TargetFormat) Then
_capturectrl.ShowDialog(CaptureDlg.TargetFormat, _form)
End If
' tune to a channel with closed captions
_capturectrl.TVTuner.SetChannel(28, -1, -1)
' set the target file
_capturectrl.TargetFile = outFile
' enable the preview
_capturectrl.Preview = True
' check if closed captioning is enabled
If _capturectrl.ClosedCaptionAvailable AndAlso _capturectrl.ClosedCaptioning = False Then
' try to toggle closed captioning
_capturectrl.ToggleClosedCaptioning()
' set the result to what we expect
If _capturectrl.ClosedCaptioning Then
_result = True
End If
' get the previewing cc state
Dim _previewCC As Boolean = _capturectrl.PreviewingClosedCaption
End If
' check if we have can capture video
If _capturectrl.IsModeAvailable(CaptureMode.VideoAndAudio) Then
_capturectrl.TimeLimit = 30 ' just 30 seconds of capture time
_capturectrl.UseTimeLimit = True
' start the capture process
_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
_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
Public NotInheritable Class LEAD_VARS
Public Const MediaDir As String = "C:\Program Files (x86)\LEAD Technologies\LEADTOOLS 20\Media"
End Class
Help Collections
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