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How to Gstreamer's udpsrc display (wpf)

I would like to use gstreamer to display udpsrc video, but it does not work.
On the command line it works fine.
"Gst.Video.Global.IsVideoOverlayPrepareWindowHandleMessage(msg)" will always be False.
Please help me...
send command:
gst-launch-1.0.exe autovideosrc ! videoconvert ! vp8enc deadline=1 ! rtpvp8pay pt=96 ! udpsink port=5200 host=<MY-LOCALIP> async=false
recv command:
gst-launch-1.0.exe udpsrc port=5200 caps="application/x-rtp,payload=(int)96" ! rtpjitterbuffer latency=10 ! rtpvp8depay ! avdec_vp8 output-corrupt=false ! videoconvert ! autovideosink
csharp program:
private void CreatePipeLine()
{
if(pipeline != null)
{
pipeline.SetState(State.Null);
islive = false;
return;
}
pipeline = new Pipeline("pipeline");//"playback");
var udpsrc = Gst.ElementFactory.Make("udpsrc", "source");
udpsrc["port"] = 5200;
//udpsrc["caps"] = "application/x-rtp,payload=96";
var jitter = Gst.ElementFactory.Make("rtpjitterbuffer", "jitter");
jitter["latency"] = 10;
var depay = Gst.ElementFactory.Make("rtpvp8depay", "depay");
var avdec = Gst.ElementFactory.Make("avdec_vp8", "avdec");
avdec["output-corrupt"] = false;
var convert = Gst.ElementFactory.Make("videoconvert", "convert");
var capsRTP = Gst.Global.CapsFromString("application/x-rtp,payload=96");
var mAppSink = new AppSink("appsink");
mAppSink["emit-signals"] = true;
mAppSink["caps"] = capsRTP;
mAppSink.NewSample += OnNewSample;
ink = Gst.ElementFactory.Make("autovideosink", "ink");
pipeline.Add(udpsrc, jitter, depay, avdec, convert, mAppSink); //ink);
udpsrc.Link(jitter);
jitter.Link(depay);
depay.Link(avdec);
avdec.Link(convert);
convert.Link(ink);
Bus bus = pipeline.Bus;
bus.AddSignalWatch();
bus.Message += OnBusMessage;
bus.EnableSyncMessageEmission();
bus.SyncMessage += new SyncMessageHandler(OnBusSynMessage);
/*
VideoSink = new AppSink(ink.Handle);
VideoSink.Drop = true;
VideoSink.MaxLateness = (1000 / 30) * 1000000;
VideoSink.MaxBuffers = 1;
VideoSink.Qos = true;
VideoSink.EnableLastSample = false;
VideoSink.Caps = Gst.Caps.FromString("video/x-raw,format=RGBA");
pipeline.Bus.EnableSyncMessageEmission();
pipeline.Bus.AddSignalWatch();
pipeline.Bus.SyncMessage += OnBusSynMessage;
pipeline.Bus.Message += OnBusMessage;
*/
pipeline.SetState(State.Null);
var ret = pipeline.SetState(State.Ready);
}
private void OnBusSynMessage(object o, SyncMessageArgs sargs)
{
Gst.Message msg = sargs.Message;
if (!Gst.Video.Global.IsVideoOverlayPrepareWindowHandleMessage(msg)) { return;}
Element src = msg.Src as Element;
if(src == null) { return;}
try { src["force-aspect-ration"] = true;}
catch(PropertyNotFoundException) { }
Element overlay = ((Gst.Bin)src).GetByInterface(VideoOverlayAdapter.GType);
if(overlay == null)
{
System.Diagnostics.Debug.WriteLine($"Overlay is null");
return;
}
_adapter = new VideoOverlayAdapter(overlay.Handle);
_adapter.WindowHandle = _windowHandle;
_adapter.HandleEvents(true);
_isRender = true;
}
Tried this method during playback, but "sample" was null.
var sink = VideoSink;
if(sink == null) { return; }
Sample sample = sink.TryPullSample(5000);
if(sample == null)
{
return;
}
Reference Site:
https://github.com/vladkol/gstreamer-netcore/tree/master/samples/AvaloniaPlayer
how to use application/x-rtp binding with gstreamer-sharp?
I've changed the caps location to udpsrc,
I have tried autovideosink, etc.

Gst.Video.Global.IsVideoOverlayPrepareWindowHandleMessage(msg)
will be not null only if you have autovideosink in your pipeline. This is because a Window creation request will be created if you have Window "VideoSink" like autovideosink, glvideosink... which implements GstVideoOverlay. (https://gstreamer.freedesktop.org/documentation/opengl/glimagesink.html?gi-language=c#hierarchy see implemented interfaces)
pipeline.Add(udpsrc, jitter, depay, avdec, convert, ink);
Why not setting your pipeline to playing instead of ready ?
var ret = pipeline.SetState(State.Playing);

PosPrinter GetDefaultAsync always returns null

I'm trying to print a ticket using .NET POS but i'm not able to get the Default printer.
PosPrinter defaultPrinter = await PosPrinter.GetDefaultAsync();
I also tried this:
string deviceSelector = PosPrinter.GetDeviceSelector();
PosPrinter printer = await PosPrinter.FromIdAsync(deviceSelector);
I have my thermal printer configured as default.

Have you tried the way using the PosExplorer and the printer name? Snippet:
public PosPrinter GetPrinterByName(System.Windows.Forms.Form mainForm, string printerName)
{
PosPrinter printer = null;
PosExplorer explorer = new PosExplorer(mainForm);
DeviveCollection printers = explorer.GetDevices(DeviceType.PosPrinter);
if (printers != null && printers.Count > 0)
{
for (int i = 0; i < printers.Count; i++)
{
if(0 == string.Compare(printerName, printers[i].ServiceObjectName))
{
printer = printers[i];
break;
}
}
}
return printer;
}

Watin - BringToFront() not working

I'm having the difficulties to use watin bringtofront function. It just doesn't bring my browser to the front - someone please shed me some light on it.
Here's my code:
public bool GenerateReport(string rptPath, string rptName)
{
var popupTitle = new Regex("Crystal Reports ActiveX");
var popUpBrowser = WatiN.Core.Browser.AttachTo<IE>(Find.ByTitle(popupTitle));
if (popUpBrowser != null)
{
var result = false;
try
{
popUpBrowser.AutoClose = false;
popUpBrowser.BringToFront();
popUpBrowser.ShowWindow(NativeMethods.WindowShowStyle.ShowMaximized);
popUpBrowser.DialogWatcher.CloseUnhandledDialogs = false;
result = ExportPdfFile(popUpBrowser, rptPath + rptName + RptExt);
}
finally
{
popUpBrowser.Close();
}
return result;
}
return false;
}

Parallel.Foreach do not finish stream

For load testing purposes I need to simulate multiple users trying to login to a system at the same time. I have code written by another developer that can send a login request to the system. With an ok login it will also return other information in xml.
I've tried using Parallel.ForEach, but dont have any real experience with parallel programming:
Parallel.ForEach(clientList, client =>
{
RunTest(client);
});
public void RunTest(object data)
{
if (!(data is IGprsClient))
{
return;
}
_noRunningTests += 1;
IGprsClient gprsClient = data as IGprsClient;
DateTime startTime = DateTime.Now;
Log(gprsClient.Id, "Test started.");
bool result = gprsClient.StartTest(20000);
DateTime endTime = DateTime.Now;
TimeSpan diff = endTime - startTime;
if (result == false)
{
Log(gprsClient.Id, "Test failed.");
}
Log(gprsClient.Id, "Test took {0}ms. ", (int)diff.TotalMilliseconds);
_noRunningTests -= 1;
}
override public bool StartTest(int timeout)
{
_testStarted = true;
try
{
LogDebug("Trying to connect.");
_client = new TcpClient(ipAddress, port);
LogDebug("Connected.");
bool result = false;
//Todo: insert testcase into client
switch (TestCaseName)
{
case "LoginTEST":
var testCase = new LoginTEST(this);
result = testCase.Execute(user, pwd, phoneNum);
break;
default:
Log("Unknown test case: " + TestCaseName);
break;
}
_client.Close();
return result;
}
catch (Exception ex)
{
if (_client != null)
_client.Close();
Log(ex.Message);
return false;
}
}
Which in turn will send the request and read the response.
public bool Execute(string user, string pwd, string phoneNum)
{
SendDataListRequest(userId);
string requiredDataResponse = Client.ReadMsg();
return true;
}
Run test will send a request and reads the message like so:
public string ReadMsg()
{
int msgLength = -1;
var stream = _client.GetStream();
while (_testStarted)
{
int b = stream.ReadByte();
if (b == -1)
{
return "";
}
else if (b == 0x02 || msgLength == -1)
{
while (b != 0x02 && _testStarted)
{
b = stream.ReadByte(); // Finds the start token
if (b == -1)
{
return "";
}
}
msgLength = 0; // Starts collecting data
}
else if (b == 0x03)
{
byte[] encryptedMsg = Convert.FromBase64String(
Encoding.UTF8.GetString(byteBuffer, 0, msgLength));
byte[] decryptedMsg = SttCipher.DecryptMessage(encryptedMsg);
MemoryStream ms = new MemoryStream(decryptedMsg);
GZipStream gZipStream = new GZipStream(ms, CompressionMode.Decompress, true);
var bufLen = ReadAllBytesFromStream(gZipStream, decompressedBuffer);
gZipStream.Close();
string completeMsg = Encoding.UTF8.GetString(decompressedBuffer, 0, bufLen);
if (completeMsg.Length < 500)
LogDebug("Received XML-data:\n{0}", completeMsg);
else
LogDebug("Received XML-data: {0} bytes\n{1}...", completeMsg.Length, completeMsg.Substring(0, 500));
return completeMsg;
}
else
{
if (byteBuffer.Length <= msgLength)
{
throw new Exception("XML message too long!");
}
byteBuffer[msgLength] = (byte)b;
msgLength++;
}
}
return "";
}
Running one client is fine and will wait for the response. The issue is with several clients, the responses gets cut off. Leaving me with unclosed xml in the response.But I cant't figure out why. Does anyone have a reasonable explanation and/or a solution or a better way of doing it?

Create a new Hyper-V VM (using WMI) with specific hardware

I'm wanting to create a new Hyper-V VM with a determined amount of RAM, network card, number of processor cores, and attach a VHD file to the IDE controller.
The problem is that the Msvm_ResourceAllocationSettingData is not very easy to work with. The code I'm using doesn't work (this is code to attach a VHD to an existing VM, however I would also like to use it when creating a new VHD too).
public void AttachVhd(IdeChannel ideChannel, String vhdPath) {
// Get VirtualSystemSettingData
ManagementObject vssd = this.GetVirtualSystemSettingData();
// Get the IDE Controller
ManagementObject ideController = this.GetResourceAllocationSettingData(ResourceType.IdeController, ResourceSubType.IdeController);
// Create synthetic disk:
ManagementObject syntheticDiskRasd = this.GetResourceAllocationSettingData(ResourceType.Disk, ResourceSubType.DiskSynthetic);
syntheticDiskRasd["Parent"] = ideController.Path;
syntheticDiskRasd["Address"] = ideChannel == IdeChannel.Primary ? "0" : "1";
this.AddVirtualSystemResources(syntheticDiskRasd);
// Attach it
ManagementObject vhdRasd = this.GetResourceAllocationSettingData(ResourceType.StorageExtent, ResourceSubType.Vhd); ;
vhdRasd["Parent"] = syntheticDiskRasd.Path;
vhdRasd["Connection"] = new String[] { vhdPath };
this.AddVirtualSystemResources( vhdRasd );
// Cleanup
vhdRasd.Dispose();
syntheticDiskRasd.Dispose();
ideController.Dispose();
vssd.Dispose();
}
private ManagementObject GetResourceAllocationSettingData(ResourceType resourceType, ResourceSubType resourceSubType)
{
String desiredSubType = ResourceSubTypeStrings.GetString(resourceSubType); // Scout.Common.Extensions.GetDescription( resourceType );
using(ManagementObjectCollection settingsDatas = _vm.GetRelated("Msvm_VirtualSystemSettingData"))
foreach(ManagementObject settingData in settingsDatas)
{
using(ManagementObjectCollection rasds = settingData.GetRelated("Msvm_ResourceAllocationSettingData"))
foreach(ManagementObject rasd in rasds)
{
ResourceType rasdResourceType = (ResourceType)(UInt16)rasd["ResourceType"];
String rasdResourceSubType = (String)rasd["ResourceSubType"];
String rasdOtherType = (String)rasd["OtherResourceType"];
if( rasdResourceType == resourceType && rasdResourceSubType == desiredSubType )
{
return rasd;
}
}
}
return null;
}
private void AddVirtualSystemResources(ManagementObject rasd)
{
using (ManagementObject vmService = HyperV.GetManagementService())
{
ManagementBaseObject inParams = vmService.GetMethodParameters("AddVirtualSystemResources");
inParams["TargetSystem"] = _vm;
inParams["ResourceSettingsData"] = rasd.GetText(TextFormat.CimDtd20);
ManagementBaseObject outParams = vmService.InvokeMethod("AddVirtualSystemResources", inParams, options: null);
String[] addedResources = (String[])outParams["NewResources"];
OperationReturnCode returnValue = (OperationReturnCode)(UInt32)outParams["ReturnValue"];
if (returnValue == OperationReturnCode.JobStarted)
{
String jobPath = (String)outParams["Job"];
HyperV.MonitorJob(jobPath);
}
else if (returnValue == OperationReturnCode.Completed)
{
}
else
{
throw new ApplicationException( returnValue.ToString() );
}
}
}

Rather than find your problem, can I point you to an example that works?
See WmiCalls.DeployVirtualMachine in my Apache CloudStack Hyper-V plugin
Post a comment if you need additional detail, and I will update the answer.