[DispIdAttribute(5)]
double MaxQueueDuration {get; set;}
A System.Double value that represents the maximum amount of time, in seconds, that the multiplexer will be allowed to queue data before dropping frames. The default value is 5.0 seconds.
The MaxQueueDuration sets the amount of data that is allowed to be buffered. If this value is exceeded frames will be pruned until the network performance improves. An alternative to increasing network performance would be to reduce the output of multiplexer. This prevents the queue from growing to large sizes if the output stage is slower than the input stage.
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;
}
}