Gets or sets a value that indicates whether the media source is treated as a live source.
[DispIdAttribute(3)]
bool LiveSource {get; set;}
true if the source is treated as a live source; otherwise it is false if the source is not live.
If the media source is a live source, dropping samples is allowed if the output is lagging behind the source.
If the media source is NOT live, the multiplexer will buffer more samples to keep up with the source.
This uses the MaxQueueDuration value to determine when to drop samples.
In a live capture situation the multiplexer will drop samples in attempt to prevent the video stream from halting before the MaxQueueDuration is reached.
The Leadtools Multiplexer will start dropping samples at 2/3 of the MaxQueueDuration.
using Leadtools;
using Leadtools.Multimedia;
using LeadtoolsMultimediaExamples.Fixtures;
public bool _result = false;
public CaptureCtrlForm _form = new CaptureCtrlForm();
public CaptureCtrl _captureCtrl;
const int MaxBitRate = 128;
const int TestBitRate = MaxBitRate + 1;
public void NetworkMultiplexerExample()
{
// reference the capture control
_captureCtrl = _form.CaptureCtrl;
// output file
string outFile = @"ltsf://127.0.0.1:27015";
try
{
// try to find a USB camera
if (_captureCtrl.VideoDevices["Logitech"] == null)
throw new Exception("No Logitech video device available");
_captureCtrl.VideoDevices["Logitech"].Selected = true;
// select a video compressor
_captureCtrl.VideoCompressors.Mpeg4.Selected = true;
// set the target output file
_captureCtrl.TargetFormat = TargetFormatType.NET;
_captureCtrl.TargetFile = outFile;
if (_captureCtrl.IsModeAvailable(CaptureMode.Video))
{
// just 10 seconds of capture time
_captureCtrl.TimeLimit = 10;
_captureCtrl.UseTimeLimit = true;
// ready the capture graph in order to get the LNMetMux instance
_captureCtrl.ReadyCapture(CaptureMode.Video);
// get the network multiplexer reference
LMNetMux pMux = _captureCtrl.GetSubObject(CaptureObject.TargetFilter) as LMNetMux;
if (pMux != null)
{
// set live source (dropping samples is allowed if the sink is not sending fast enough to keep up)
pMux.LiveSource = true;
// atleast 10 seconds for the netmux sample queue
if (pMux.MaxQueueDuration < 10)
pMux.MaxQueueDuration = 10;
// 128 kbps max
pMux.BitRateLimit = MaxBitRate * 1024;
// set the result to what we expect
_result = true;
}
// start capture
_captureCtrl.StartCapture(CaptureMode.Video);
// 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)
{
if (pMux != null)
{
// confirm that the actual bitrate does not exceed our max specified above
_result &= (pMux.BitRate / 1024 < TestBitRate);
}
Application.DoEvents();
}
// release the mux since its a COM object
if (pMux != null)
Marshal.ReleaseComObject(pMux);
}
}
catch (Exception)
{
_result = false;
}
}