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• Revision a7c69a71d9 : Fix broken encoding process at sub8x8 block size Use the correct buffer to upda

  17 avril 2014, par Jingning Han

  Changed Paths :
   Modify /vp9/encoder/vp9_encodeframe.c

  
  
  Fix broken encoding process at sub8x8 block size

  Use the correct buffer to update the coding mode decision for
  sub8x8 blocks.

  Change-Id : I091ef27d2047eeb8b73ceb7c2c7c45b38ba8c6d5

• processing audio in java using process builder and sox or ffmpeg

  15 août 2016, par D Liebman

  I’m processing audio files with java. I use a command line option like ffmpeg or sox to read the file. When I’m trying to use sox to decode a mp3 file. I type something like this at the command line :

  sox input.mp3 output.dat

  and this gives me a output file with text in it. How do I stream the output to standard out ? I’d like to use the command in a java program using a process builder. I have been able to use ffmpeg like this :

  ffmpeg -v quiet -i dnd-07-music.mp3 -ac 1 -filter:a aresample=8000 -map 0:a -c:a pcm_s16le -f data -

  but this doesn’t seem to give me amplitude. I’m not sure what I’m looking at, but I think it’s pulse-code-modulation. I’d like something that gives me amplitudes over time (and just one channel).

  EDIT :
  Just to be clear, I want amplitudes ... a stream of amplitudes in binary form. I don’t want just one number.

• 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();
  
  
  
      }