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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 ?

• When player client starts to play a dash media

  7 juillet 2022, par CoXier

  I'm working on Android Player for playing dash media.

  


  In order to enable video starting fast, I preload a part of dash media, now the size of preload is 600kb.

  


  As you see, 600kb is a magic number. In my opinion, different size should be preloaded for different dash file.

  


  All start position of dash media is 0.

  


  I want to know : How to know the size of dash media which can support player starts to play ?

  


  Thanks for your help.

  


• is it possible to play FFplay video on QVideoWidget ?

  8 octobre 2022, par Eswar T

  I'm trying to build a video editing software in which before rendering we need to show the video to user so i though of using ffplay to do it and it worked for me(opening in a new window) but now i want to place in a fixed QVideoWidget so the output will be displayed their

  


  A basic GUI image will be added below


  


  a code to display a simple video and it works fine now i want add

  


  ffplay input.mp4


  


  So it plays video even editing videos

  


  self.player = QtMultimedia.QMediaPlayer(None, QtMultimedia.QMediaPlayer.VideoSurface)
file = os.path.join(os.path.dirname(__file__), "Input.mp4")
self.player.setMedia(QtMultimedia.QMediaContent(QtCore.QUrl.fromLocalFile(file)))
self.player.setVideoOutput(self.widget)
self.player.play()


  


  Currently, my application plays video like this in a separate window but I want to play it in that black box Hope now its a bit clear