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• Revision 7045aec00a : SAD32xh and SAD64xh for AVX2 All sad function that process above 32 consecutive

  2 octobre 2014, par levytamar82

  Changed Paths :
   Modify /test/sad_test.cc

  
   Modify /vp9/common/vp9_rtcd_defs.pl

  
   Add /vp9/encoder/x86/vp9_sad_intrin_avx2.c

  
   Modify /vp9/vp9cx.mk

  
  
  SAD32xh and SAD64xh for AVX2

  All sad function that process above 32 consecutive elements are optimized
  for AVX2 :
  vp9_sad64x64
  vp9_sad64x32
  vp9_sad32x64
  vp9_sad32x32
  vp9_sad32x16
  vp9_sad64x64_avg
  vp9_sad64x32_avg
  vp9_sad32x64_avg
  vp9_sad32x32_avg
  vp9_sad32x16_avg
  The functions that appeared as a hotspot is vp9_sad32x32 and vp9_sad64x64
  vp9_sad32x32 was optimized by 68% and vp9_sad64x64 was optimized by 90%
  both of them gave and overall 2.3% user level gain

  Change-Id : Iccf86b375a2b54c5fbbe685902ead0c9a561b9fd

• Only 1 process is showing activity parallel foreach

  18 janvier 2018, par TheHappyGuy

  So I am using a Parallel.Foreach because I want to start 4 unique processes that does essentially the same thing. Watermarks a video.

  How it should work is that it should open 4 ffmpeg.exe and pass an argument to each window so it watermarks 4 videos at a time.
  However.. That’s not what is happening, It opens 4 processes but only 1 is active. Not sure if it’s trying to use the same one 4 times or what ever it could be but I need help.

  When I close the working process, the 3 non working ones are still there until I manually close them down.
  Here is a visual representation

  

  Here is a second image showing what happends when closing the working one

  

  Here is the code :

  public void Watermark()
  
      {
  
          Console.WriteLine("Please enter the directory with the mp4 files: ");
  
          string EntryPath = Console.ReadLine();
  
  
  
          //Console.WriteLine("Please enter the directory with the mp4 files: ");
  
          //string OutputPath = Console.ReadLine();
  
  
  
          var psi = new ProcessStartInfo();
  
          psi.WindowStyle = ProcessWindowStyle.Hidden;
  
          psi.FileName = "ffmpeg.exe";
  
          int i = 0;
  
  
  
          var videos = Directory.EnumerateFiles(EntryPath, "*.mp4");
  
          Parallel.ForEach(videos, new ParallelOptions { MaxDegreeOfParallelism = 4 },
  
              vid =>
  
              {
  
                  try
  
                  {
  
                      //Maybe those processes are trying to work on the same file and can't access it?
  
                      //It's probably better to use the event Exited than WaitForExit
  
                      psi.Arguments = $"-i {vid} -i watermarker.png -threads 4 -filter_complex \"overlay = 275:350\" C:\\Users\\Developer\\Desktop\\Eh\\Watermarked{i}.mp4";
  
                      var p = Process.Start(psi);
  
                      p.WaitForExit();
  
  
  
                      Console.WriteLine($"{vid} is watermarked");
  
                      i++;
  
                  }
  
                  catch (Exception)
  
                  {
  
                      Console.ForegroundColor = ConsoleColor.Red;
  
                      Console.WriteLine("Error parsing that file");
  
                      Console.ForegroundColor = ConsoleColor.White;
  
                  }
  
  
  
              });
  
          Console.ReadLine();
  
  
  
      }

• Revision cb1e817c77 : Refactor intra block prediction and reconstruction process Flaten the intra blo

  13 juillet 2015, par Jingning Han

  Changed Paths :
   Modify /vp9/decoder/vp9_decodeframe.c

  
  
  Refactor intra block prediction and reconstruction process

  Flaten the intra block decoding process. It removes the legacy
  foreach_transformed_block use in the decoder. This saves cycles
  spent on retrieving the transform block position.

  Change-Id : I21969afa50bb0a8ca292ef72f3569f33f663ef00