Live TV streaming (1 Viewer)

[DieBagger]

For what parts do you need the webservices? To start timeshifting and get the rtsp streams? Couldn't you just include the tvserver dlls and write the method yourself (WebTvResult StartTimeShifting(int idChannel))?

I'm not really good with VB but afaik it shouldn't be a problem using a c# dll in a vb project?!?

 

[cheezey]

No - I can do the start timeshifting (it was already in iPiMP).

My tests have shown much better transcoding results when I ffmpeg transcode the MPWebServices 'direct profile' stream rather than when I ffmpeg transcode the raw TV Server RTSP stream. The 'direct profile' seems to just read the input RTSP stream and copy it to an output stream using named pipes, so I was trying to implement that in iPiMP. Those methods are provided as *.cs files in the App_Code folder and so I can't just include them into my VB project. So I tried to translate them into VB but came accross a few differences between the languages - like VB not supporting Lamda expressions - I don't even know what that means

My issue now is translating (NamedPipe.cs)

public override void Start(Boolean isClient)
        {
            if (isClient)
            {
                NamedPipeClientStream client = new NamedPipeClientStream (".", _pipeName, PipeDirection.InOut, PipeOptions.Asynchronous);
                client.Connect(10000); // 10 second timeout.

                pipe = client;
                isReady = true;
            }
            else
            {
                NamedPipeServerStream server = new NamedPipeServerStream(_pipeName, PipeDirection.InOut, 1, PipeTransmissionMode.Byte, PipeOptions.Asynchronous);
                server.BeginWaitForConnection(new AsyncCallback(WaitForConnection), server);
            }
        }

ends up as

 Public Overloads Overrides Sub Start(ByVal isClient As Boolean)
            If isClient Then
                Dim client As New NamedPipeClientStream(".", _pipeName, PipeDirection.InOut, PipeOptions.Asynchronous)
                client.Connect(10000) '10 second timeout.
                pipe = client
                m_isReady = True
            Else
                Dim server As New NamedPipeServerStream(_pipeName, PipeDirection.InOut, 1, PipeTransmissionMode.Byte, PipeOptions.Asynchronous)
                server.BeginWaitForConnection(New AsyncCallback(AddressOf WaitForConnection), server).AsyncWaitHandle.WaitOne(10000)
                m_isReady = True
            End If
        End Sub

               Private Sub WaitForConnection(ByVal ar As IAsyncResult)
            Try
                Dim server As NamedPipeServerStream = TryCast(ar.AsyncState, NamedPipeServerStream)
                server.EndWaitForConnection(ar)

                pipe = server
                m_isReady = True
            Catch ex As Exception

            End Try
        End Sub

But the AsyncCallback(AddressOf WaitForConnection) never gets called by server.BeginWaitForConnection(New AsyncCallback(AddressOf WaitForConnection), server)

Like I say - most of this is way over my head.

 

[DieBagger]

Really hard to say from a distance, also I don't know what you already know so forgive me if I tell you something obvious (or even worse false ).

First of all:

server.BeginWaitForConnection(New AsyncCallback(AddressOf WaitForConnection), server[B]).AsyncWaitHandle.WaitOne(10000)[/B]

Why are you blocking the thread for 10000 ms, it isn't done in the c# original ? What you do with this is tell the NamedPipe to call the method WaitForConnection when the Pipe receives input. You get the input from your mencoder/ffmpeg which is registered in EncoderWrapper->StartProcess

encoderOutput.UnderlyingStreamObject = applicationThread.StandardOutput.BaseStream;

If "WaitForConnection" is never called you might want to check if the process is set up correctly (path of ffmpeg?). Do you see the console popup from ffmpeg when the transcoding starts btw?

Hope that helped...

 

[cheezey]

I amaze myself with my development noobishness sometimes.

Progress today....took all the App_Code\*.cs and compiled them as a separate project and referenced this in my code. Duh!

So now I get a different exception...

Cannot process request because the process (3780) has exited.

at System.Diagnostics.Process.GetProcessHandle(Int32 access, Boolean throwIfExited)
at System.Diagnostics.Process.Kill()
at MediaPortal.TvServer.WebServices.EncoderWrapper.StopProcess() in D:\Dev\vs2008\MediaPortal Universal Web Interface\MPWebServices\EncoderWrapper.cs:line 192
at Website.uWiMP.TVServer.Streamer.Stream(MediaType mediatype, Int32 id) in D:\Dev\vs2008\MediaPortal Universal Web Interface\Website\Code\TVServer\Streamer.vb:line 119
at Website.WatchTVChannel.WatchChannel(String friendly, String channelID) in D:\Dev\vs2008\MediaPortal Universal Web Interface\Website\iPhone\TVGuide\WatchTVChannel.aspx.vb:line 83
at Website.WatchTVChannel.Page_Load(Object sender, EventArgs e) in D:\Dev\vs2008\MediaPortal Universal Web Interface\Website\iPhone\TVGuide\WatchTVChannel.aspx.vb:line 68
at System.Web.UI.Control.OnLoad(EventArgs e) at System.Web.UI.Control.LoadRecursive()
at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)

Which I guess is the ffmpeg process exiting before it should. So that's what I'll be looking at next.

 

[cheezey]

I can't get MPWebServices transcoding with ffmpeg. I've posted in the MPWebServices forum to see if anyone else has managed it.

 

[cheezey]

Woo Hoo!! I've got the streaming working, I had to modify MPWebServices a bit. You can see the changes I've done in the attachments.

I still need to do a fair bit of work in iPiMP for navigation / stopping streaming etc. but the hard bit is done now (I HOPE!!!!)

 

[gemx]

Hi cheezy,

great work so far.
If you have any further questions regarding the streaming in MPWebServices better drop me a PM directly.
I don't have much time these days to read the forums and may easily miss an interesting post like yours

I am still very interested in combining forces to create the perfect MP WebApp.
To control the TvServer you can easily use the webservices from MPWebServices.
You just need the .asmx file and the webservices.asmx.cs file in APP_Code and you have all you need to control TvServer

 

[nicx]

great news

cheezy is your deadline still realistic? the world championship starts on friday

nicx...

 

[cheezey]

I will do my best to get you an alpha version for Friday - I am already setting my alarm clock for 5am in order to get some time to work on this - I'll just set it an hour earlier!

 

[cheezey]

Nearly there.

I've also contacted the Smooth Streaming devs about handling streams with no video (e.g. Radio ) and they're having a look to see if it's feasible.