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• Play UDP live video stream in UWP

  19 avril 2018, par Nicolas Séveno

  I need to display a live video stream in a UWP application.

  The video stream comes from a GoPro. It is transported by UDP messages. I think it is a MPEG-2 TS stream.

  I can play it successfully using FFPlay with the following command line :

  ffplay -fflags nobuffer -f:v mpegts udp://:8554

  I would like to play it with MediaPlayerElement without using a third party library.

  According to the following page :
  https://docs.microsoft.com/en-us/windows/uwp/audio-video-camera/supported-codecs
  UWP should be able to play it. (I installed the "MPEG 2 video extension" in the Windows Store).

  I tried using DatagramSocket and the MessageReceived event to receive the UDP packets, it works without problem :

  _datagramSocket = new DatagramSocket();
  
  _datagramSocket.MessageReceived += (s, args) =>
  
  {
  
      Debug.WriteLine("message received");
  
  };
  
  await _datagramSocket.BindServiceNameAsync(8554);

  Then I create a MseStreamSource :

  _mseStreamSource = new MseStreamSource();
  
  _mseStreamSource.Opened += (_, __) =>
  
  {
  
      _mseSourceBuffer = _mseStreamSource.AddSourceBuffer("video/mp2t");
  
  };
  
  this.MediaSource = MediaSource.CreateFromMseStreamSource(_mseStreamSource);

  And in the DatagramSocket.MessageReceived event I send the messages to the MseStreamSource :

  using (IInputStream stream = args.GetDataStream())
  
  {
  
      _mseSourceBuffer.AppendStream(stream);
  
  }

  The AppendStream method fails with error HRESULT 0x8070000B for some packets.
  If I catch the error, the MediaPlayerElement displays the message "video not supported or incorrect file name". (not sure of the message, my Windows is in French).

  Is the MseStreamSource the correct way to display the stream ? Is there a better solution ?

• Use ffmpeg to stream live content to azure media services

  19 mars 2018, par Dadicool

  I’ve been trying to stream content to azure media services using ffmpeg as it’s one of the options described here : http://azure.microsoft.com/blog/2014/09/18/azure-media-services-rtmp-support-and-live-encoders/

  My command is :

  ffmpeg -v verbose -i 300.mp4 -strict -2 -c:a aac -b:a 128k -ar 44100 -r 30 -g 60 -keyint_min 60 -b:v 400000 -c:v libx264 -preset medium -bufsize 400k -maxrate 400k -f flv rtmp://nessma-****.channel.mediaservices.windows.net:1935/live/584c99f5c47f424d9e83ac95364331e7

  I have made sure that the streaming endpoint has one active streaming unit, I also made sure that the channel is actually Ready and I even get it to start streaming (which makes a PublishURL available).

  When I execute the ffmpeg command to start streaming, I keep getting the following error :

  ffmpeg version 2.5.2 Copyright (c) 2000-2014 the FFmpeg developers
 built on Dec 30 2014 11:31:18 with llvm-gcc 4.2.1 (LLVM build 2336.11.00)
 configuration: --prefix=/Volumes/Ramdisk/sw --enable-gpl --enable-pthreads --enable-version3 --enable-libspeex --enable-libvpx --disable-decoder=libvpx --enable-libmp3lame --enable-libtheora --enable-libvorbis --enable-libx264 --enable-avfilter --enable-libopencore_amrwb --enable-libopencore_amrnb --enable-filters --enable-libgsm --enable-libvidstab --enable-libx265 --arch=x86_64 --enable-runtime-cpudetect
 libavutil      54. 15.100 / 54. 15.100
 libavcodec     56. 13.100 / 56. 13.100
 libavformat    56. 15.102 / 56. 15.102
 libavdevice    56.  3.100 / 56.  3.100
 libavfilter     5.  2.103 /  5.  2.103
 libswscale      3.  1.101 /  3.  1.101
 libswresample   1.  1.100 /  1.  1.100
 libpostproc    53.  3.100 / 53.  3.100
Routing option strict to both codec and muxer layer
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x7f9a0a002c00] overread end of atom 'colr' by 1 bytes
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x7f9a0a002c00] stream 0, timescale not set
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x7f9a0a002c00] max_analyze_duration 5000000 reached at 5003637 microseconds
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '300.mp4':
 Metadata:
   major_brand     : mp42
   minor_version   : 0
   compatible_brands: mp42isomavc1
   creation_time   : 2014-01-11 05:39:32
   genre           : Trailer
   artist          : Warner Bros.
   title           : 300: Rise of an Empire - Trailer 2
   encoder         : HandBrake 0.9.9 2013051800
   date            : 2014
 Duration: 00:02:33.24, start: 0.000000, bitrate: 7377 kb/s
   Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 1920x1080 (1920x1088), 7219 kb/s, 23.98 fps, 23.98 tbr, 90k tbn, 47.95 tbc (default)
   Metadata:
     creation_time   : 2014-01-11 05:39:32
     encoder         : JVT/AVC Coding
   Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 157 kb/s (default)
   Metadata:
     creation_time   : 2014-01-11 05:39:32
   Stream #0:2: Video: mjpeg, yuvj420p(pc, bt470bg/unknown/unknown), 101x150 [SAR 72:72 DAR 101:150], 90k tbr, 90k tbn, 90k tbc
rtmp://nessma-****.channel.mediaservices.windows.net:1935/live/584c99f5c47f424d9e83ac95364331e7: Input/output error

  The Azure blog post clearly states that this should be possible but I can’t find a working example anywhere.

  Environment :

  • MacOS Maverick
  • FFMPEG installed from official build
  • 300.mp4 : 1080p trailer of the latest 300 movie

• create Accord.Video.FFMPEG object intial error

  14 mars 2018, par lokcyi

  I create an project with C# Visual studio 2013 and reference Accord.Video.FFMPEG.dll.
  The Configure of projects Target Platforms is set to x86.
  It is ok while compileing.
  But,It would throw run time error when application running.
  The exception is below. showing =>This application cannot be run in 64-bits
  I have no idea what wrong with the error ?

  ---

  System.TypeInitializationException   IsTransient=false
  
    Message='<module>' 的型別初始設定式發生例外狀況。
  
    Source=VideoMarkerAccord
  
    TypeName=<module>
  
    StackTrace:
  
         於 VideoMarker.Form1.test()
  
         於 VideoMarker.Form1.ConvertVedio(Int32 iFps, Int32 bitrate, Int32 width, Int32 height, Int32 iSpeed, String sOutputPath, String xml, String sVCode) 於 d:\Projects\AForge\VideoMarkerAccord\VideoMarker\Form1.cs: 行 201
  
         於 VideoMarker.Form1.btnConvertVedio_Click(Object sender, EventArgs e) 於 d:\Projects\AForge\VideoMarkerAccord\VideoMarker\Form1.cs: 行 181
  
         於 System.Windows.Forms.Control.OnClick(EventArgs e)
  
         於 System.Windows.Forms.Button.OnClick(EventArgs e)
  
         於 System.Windows.Forms.Button.OnMouseUp(MouseEventArgs mevent)
  
         於 System.Windows.Forms.Control.WmMouseUp(Message&amp; m, MouseButtons button, Int32 clicks)
  
         於 System.Windows.Forms.Control.WndProc(Message&amp; m)
  
         於 System.Windows.Forms.ButtonBase.WndProc(Message&amp; m)
  
         於 System.Windows.Forms.Button.WndProc(Message&amp; m)
  
         於 System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message&amp; m)
  
         於 System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message&amp; m)
  
         於 System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
  
         於 System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG&amp; msg)
  
         於 System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(Int32 dwComponentID, Int32 reason, Int32 pvLoopData)
  
         於 System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context)
  
         於 System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)
  
         於 System.Windows.Forms.Application.Run(Form mainForm)
  
         於 VideoMarker.Program.Main() 於 d:\Projects\AForge\VideoMarkerAccord\VideoMarker\Program.cs: 行 18
  
         於 System.AppDomain._nExecuteAssembly(Assembly assembly, String[] args)
  
         於 System.AppDomain.nExecuteAssembly(Assembly assembly, String[] args)
  
         於 System.Runtime.Hosting.ManifestRunner.Run(Boolean checkAptModel)
  
         於 System.Runtime.Hosting.ManifestRunner.ExecuteAsAssembly()
  
         於 System.Runtime.Hosting.ApplicationActivator.CreateInstance(ActivationContext activationContext, String[] activationCustomData)
  
         於 System.Runtime.Hosting.ApplicationActivator.CreateInstance(ActivationContext activationContext)
  
         於 System.Activator.CreateInstance(ActivationContext activationContext)
  
         於 Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssemblyDebugInZone()
  
         於 System.Threading.ThreadHelper.ThreadStart_Context(Object state)
  
         於 System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
  
         於 System.Threading.ThreadHelper.ThreadStart()
  
    InnerException: <crtimplementationdetails>.ModuleLoadException
  
         _HResult=-2146233088
  
         _message=The C++ module failed to load during process initialization.
  
  
  
         IsTransient=false
  
         Message=The C++ module failed to load during process initialization.
  
  
  
         Source=msvcm90
  
         StackTrace:
  
              於 <crtimplementationdetails>.ThrowModuleLoadException(String errorMessage, Exception innerException)
  
              於 <crtimplementationdetails>.ThrowModuleLoadException(String , Exception )
  
              於 <crtimplementationdetails>.LanguageSupport.Initialize(LanguageSupport* )
  
              於 .cctor()
  
         InnerException: System.InvalidOperationException
  
              _HResult=-2146233079
  
              _message=This application cannot be run in 64-bits.
  
              IsTransient=false
  
              Message=This application cannot be run in 64-bits.
  
              Source=Accord.Video.FFMPEG
  
              StackTrace:
  
                   於 _init.{ctor}(_init* )
  
                   於 ?A0xbe509209.??__E?A0xbe509209@_initializer@@YMXXZ()
  
                   於 _initterm_m((fnptr)* pfbegin, (fnptr)* pfend)
  
                   於 <crtimplementationdetails>.LanguageSupport.InitializePerProcess(LanguageSupport* )
  
                   於 <crtimplementationdetails>.LanguageSupport._Initialize(LanguageSupport* )
  
                   於 <crtimplementationdetails>.LanguageSupport.Initialize(LanguageSupport* )
  
              InnerException: 
  
  </crtimplementationdetails></crtimplementationdetails></crtimplementationdetails></crtimplementationdetails></crtimplementationdetails></crtimplementationdetails></crtimplementationdetails></module></module>