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• Revision b45438181c : Rewrite filter_selectively_horiz for parallel loopfiltering Added loop filter m

  9 novembre 2013, par Yunqing Wang

  Changed Paths :
   Modify /vp9/common/vp9_loopfilter.c

  
  
  Rewrite filter_selectively_horiz for parallel loopfiltering

  Added loop filter mask checking, and made the caller function
  ready for implementation of parallel loopfiltering in horizontal
  direction.

  Next, we need to go through the loopfilter functions (both c and
  optimized versions), and provide 16-byte wide loopfiltering for
  each filter type.

  Change-Id : Ifef47e7ef9086ebc2fd6ca7ede8f27c9bbf79e66

• Server-side generated video with custom texture - Where to start ?

  12 février 2014, par opznhaarlems

  I am working on a project in which a user can upload an image and then after uploading the image, a video is generated and then displayed, containing the image which was uploaded as some sort of texture/mask. (Like they do in Elf Yourself).

  The original video should contain some sort of placeholder for the image to allow it to move around and be transformed on a matrix.

  I'm not really sure where to start off or how I should even call such a merging/blending process in the first place.

  A few requirements I've came up with so far :
  - The server runs PHP
  - I am able to use GD, Imagick and FFMPEG

  Regards

• 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 ?