Imports Leadtools
Imports Leadtools.Multimedia
Imports LeadtoolsMultimediaExamples.Fixtures
Public _result As Boolean = False
Public _form As CaptureCtrlForm = New CaptureCtrlForm()
Public _pMpgMux As LMMpg2MxTLib.LMMpg2MxT
' This example will show you the correct way to set up a muxer's properties during capture
' Normally, the muxer is added only after the capture graph has been build with ReadyCapture or StartCapture
' But at this point, the graph is in running mode, so some muxer operations might fail
' If you need to make changes to the muxer in stopped state (like adding KLV data stream, for example),
' then you need to change the muxer before the graph is fully built. You can do so by instructing the toolkit
' to cache the target filters by setting the the TargetFormat.UseFilterCache property to true
' In this situation, the filters used to implement a certain target format are created and used whenever
' you set that target format.
' This example will show you how to add KLV data to a MPEG-2 Transport Stream in a capture situation.
Public Sub UseFilterCacheExample()
' reference the capture control
Dim capturectrl As CaptureCtrl = _form.CaptureCtrl
Dim outFile As String = Path.Combine(LEAD_VARS.MediaDir, "CaptureKLV.mpg")
Try
' select the capture device
capturectrl.VideoDevices.Selection = 0 ' Use a different video device if you want
' capturectrl.Preview = true; -- enable this if you want
' set the video compressor (only if the capture device is not already capturing compressed video)
capturectrl.VideoCompressors.Mpeg2.Selected = True
' set the target output file
capturectrl.TargetFile = outFile
' subscribe to the compete event
AddHandler capturectrl.Started, AddressOf CaptureCtrl_Started
' just 10 seconds of capture time
capturectrl.TimeLimit = 10
capturectrl.UseTimeLimit = True
' subscribe to the compete event
AddHandler capturectrl.Complete, AddressOf CaptureCtrl_Complete
' IN a capture situation
'in order to get the mux in a capture situation, set the UseFilterCache property for the target format to TRUE
' This tells the toolkit to create a Mux object and keep it around when building or rebuilding graphs
capturectrl.TargetFormats(Leadtools.Multimedia.TargetFormatType.MPEG2Transport).UseFilterCache = True
capturectrl.TargetFormat = Leadtools.Multimedia.TargetFormatType.MPEG2Transport
_pMpgMux = DirectCast(capturectrl.TargetFormats(Leadtools.Multimedia.TargetFormatType.MPEG2Transport).GetCacheObject(TargetFormatObject.Mux), LMMpg2MxTLib.LMMpg2MxT)
If _pMpgMux IsNot Nothing Then
_pMpgMux.PrivateDataPID = &H70
_pMpgMux.PrivateDataFormatID = &H41564C4B
_pMpgMux.EnablePrivateData = True
End If
' start capture
capturectrl.StartCapture(Leadtools.Multimedia.CaptureMode.Video)
_result = True
Catch generatedExceptionName As Exception
_result = False
End Try
End Sub
Private Sub WriteKLVData(ByVal pMpgMux As LMMpg2MxTLib.LMMpg2MxT)
' get the current time since Jan 1, 1970
Dim basetime As TimeSpan = DateTime.UtcNow - New DateTime(1970, 1, 1, 0, 0, 0)
' get the number of microseconds since Jan 1, 1970
Dim timestamp As Int64 = CLng(basetime.TotalSeconds) * 1000000
' don't really need to do this, since I am writing only one item
pMpgMux.KlvBuilder.Clear()
' write the UDS timestamp (number of microseconds since Jan 1, 1970)
pMpgMux.KlvBuilder.InsertUInt64(-1, "06 0E 2B 34 01 01 01 03 07 02 01 01 01 05 00 00", CULng(timestamp))
' write one KLV data at the beginning
pMpgMux.WritePrivateData(CInt(LMMpg2MxTLib.Mpg2MxT_WriteFlags.Mpg2MxT_WriteFlag_PTSValid) _
Or CInt(LMMpg2MxTLib.Mpg2MxT_WriteFlags.Mpg2MxT_WriteFlag_PTSInSeconds), _
0.0, pMpgMux.KlvBuilder.GetData(), -1)
' close the stream
pMpgMux.ClosePrivateData()
End Sub
Public Sub CaptureCtrl_Started(ByVal sender As Object, ByVal e As EventArgs)
WriteKLVData(_pMpgMux)
End Sub
Public Sub CaptureCtrl_Complete(ByVal sender As Object, ByVal e As EventArgs)
' set result
_result = True
End Sub
Public NotInheritable Class LEAD_VARS
Public Const MediaDir As String = "C:\Program Files (x86)\LEAD Technologies\LEADTOOLS 19\Media"
End Class
using Leadtools;
using Leadtools.Multimedia;
using LeadtoolsMultimediaExamples.Fixtures;
public bool _result = false;
public CaptureCtrlForm _form = new CaptureCtrlForm();
public LMMpg2MxTLib.LMMpg2MxT _pMpgMux;
// This example will show you the correct way to set up a muxer's properties during capture
// Normally, the muxer is added only after the capture graph has been build with ReadyCapture or StartCapture
// But at this point, the graph is in running mode, so some muxer operations might fail
// If you need to make changes to the muxer in stopped state (like adding KLV data stream, for example),
// then you need to change the muxer before the graph is fully built. You can do so by instructing the toolkit
// to cache the target filters by setting the the TargetFormat.UseFilterCache property to true
// In this situation, the filters used to implement a certain target format are created and used whenever
// you set that target format.
//
// This example will show you how to add KLV data to a MPEG-2 Transport Stream in a capture situation.
public void UseFilterCacheExample()
{
// reference the capture control
CaptureCtrl capturectrl = _form.CaptureCtrl;
string outFile = Path.Combine(LEAD_VARS.MediaDir, "CaptureKLV.mpg");
try
{
// select the capture device
capturectrl.VideoDevices.Selection = 0; /* Use a different video device if you want */
/* capturectrl.Preview = true; -- enable this if you want */
/* set the video compressor (only if the capture device is not already capturing compressed video) */
capturectrl.VideoCompressors.Mpeg2.Selected = true;
// set the target output file
capturectrl.TargetFile = outFile;
// subscribe to the started event
capturectrl.Started += new System.EventHandler(this.CaptureCtrl_Started);
// just 10 seconds of capture time
capturectrl.TimeLimit = 10;
capturectrl.UseTimeLimit = true;
// subscribe to the complete event
capturectrl.Complete += new EventHandler(CaptureCtrl_Complete);
// IN a capture situation
//in order to get the mux in a capture situation, set the UseFilterCache property for the target format to TRUE
// This tells the toolkit to create a Mux object and keep it around when building or rebuilding graphs
capturectrl.TargetFormats[Leadtools.Multimedia.TargetFormatType.MPEG2Transport].UseFilterCache = true;
capturectrl.TargetFormat = Leadtools.Multimedia.TargetFormatType.MPEG2Transport;
_pMpgMux = (LMMpg2MxTLib.LMMpg2MxT)capturectrl.TargetFormats[Leadtools.Multimedia.TargetFormatType.MPEG2Transport].GetCacheObject(TargetFormatObject.Mux);
if (_pMpgMux != null)
{
_pMpgMux.PrivateDataPID = 0x70;
_pMpgMux.PrivateDataFormatID = 0x41564c4b;
_pMpgMux.EnablePrivateData = true;
}
// start capture
capturectrl.StartCapture(Leadtools.Multimedia.CaptureMode.Video);
_result = true;
}
catch (Exception)
{
_result = false;
}
}
private void WriteKLVData(LMMpg2MxTLib.LMMpg2MxT pMpgMux)
{
// get the current time since Jan 1, 1970
TimeSpan basetime = DateTime.UtcNow - new DateTime(1970, 1, 1, 0, 0, 0);
// get the number of microseconds since Jan 1, 1970
Int64 timestamp = (Int64)basetime.TotalSeconds * 1000000;
// do not really need to do this, since I am writing only one item
pMpgMux.KlvBuilder.Clear();
// write the UDS timestamp (number of microseconds since Jan 1, 1970)
pMpgMux.KlvBuilder.InsertUInt64(-1, "06 0E 2B 34 01 01 01 03 07 02 01 01 01 05 00 00", (ulong)timestamp);
// write one KLV data at the beginning
pMpgMux.WritePrivateData((int)LMMpg2MxTLib.Mpg2MxT_WriteFlags.Mpg2MxT_WriteFlag_PTSValid |
(int)LMMpg2MxTLib.Mpg2MxT_WriteFlags.Mpg2MxT_WriteFlag_PTSInSeconds,
0.0, pMpgMux.KlvBuilder.GetData(),
-1);
// close the stream
pMpgMux.ClosePrivateData();
}
private void CaptureCtrl_Started(object sender, EventArgs e)
{
WriteKLVData(_pMpgMux);
}
private void CaptureCtrl_Complete(object sender, EventArgs e)
{
// set result
_result = true;
}
static class LEAD_VARS
{
public const string MediaDir = @"C:\Program Files (x86)\LEAD Technologies\LEADTOOLS 19\Media";
}
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