BitRateLimit Property
Summary
Gets or sets the forced bit rate limit, in bits per second.
Syntax
[DispIdAttribute(2)]
int BitRateLimit {get; set;}
<DispIdAttribute(2)>
Property BitRateLimit As Integer
[DispIdAttribute(2)]
property int BitRateLimit {
int get();
void set ( int );
}
Property Value
An System.Int32 value that represents the forced bit rate limit, in bits per second.
The default value of the bit rate limit is -1, which means that the multiplexer is not restricted to a bit rate.
Example
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;
}
}
Imports Leadtools
Imports Leadtools.Multimedia
Imports LeadtoolsMultimediaExamples.Fixtures
Public _result As Boolean = False
Public _form As CaptureCtrlForm = New CaptureCtrlForm()
Public _captureCtrl As CaptureCtrl
Private Const MaxBitRate As Integer = 128
Private Const TestBitRate As Integer = MaxBitRate + 1
Public Sub NetworkMultiplexerExample()
' reference the capture control
_captureCtrl = _form.CaptureCtrl
' output file
Dim outFile As String = "ltsf://127.0.0.1:27015"
Try
' try to find a USB camera
If _captureCtrl.VideoDevices("Logitech") Is Nothing Then
Throw New Exception("No Logitech video device available")
End If
_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) Then
' 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
Dim pMux As LMNetMux = TryCast(_captureCtrl.GetSubObject(CaptureObject.TargetFilter), LMNetMux)
If Not pMux Is Nothing Then
' 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 Then
pMux.MaxQueueDuration = 10
End If
' 128 kbps max
pMux.BitRateLimit = MaxBitRate * 1024
' set the result to what we expect
_result = True
End If
' 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.
Do While _captureCtrl.State = CaptureState.Running
If Not pMux Is Nothing Then
' confirm that the actual bitrate does not exceed our max specified above
_result = _result And (pMux.BitRate / 1024 < TestBitRate)
End If
Application.DoEvents()
Loop
' release the mux since its a COM object
If Not pMux Is Nothing Then
Marshal.ReleaseComObject(pMux)
End If
End If
Catch e1 As Exception
_result = False
End Try
End Sub
