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• System.Diagnostics.Process pipe (vertical bar) not accepted as argument

  15 avril 2014, par emp

  I'm trying to execute following code (source : http://geekswithblogs.net/PearlFactory/archive/2011/11/23/convert-mp3-to-aacflac-to-aac-or-any-other-combination.aspx) using System.Diagnostics.Process. It works fine in command line. But in C# it's failing on the | character.

  var myProcess = new Process();
  
          var p = new ProcessStartInfo();
  
          var sArgs = " -i emp.mp3 -f wav - | neroAacEnc -ignorelength -q 0.5 -if - -of emp.mp4";
  
          p.FileName = "ffmpeg.exe";
  
          p.CreateNoWindow = false;
  
          p.RedirectStandardOutput = false;
  
          p.UseShellExecute = false;
  
          p.Arguments = sArgs;
  
          myProcess.StartInfo = p;
  
          myProcess.Start();
  
          myProcess.WaitForExit();

  It gives the following error :

  Unable to find a suitable output format for '|' : Invalid argument

  I've looked around on stackoverflow and found the following hint but it is also not working :

  var psi = new ProcessStartInfo("ffmpeg.exe");
  
          psi.Arguments = "\"-i emp.mp3 -f wav -\" | \"neroAacEnc -ignorelength -q 0.5 -if - -of emp.mp4\"";
  
          psi.CreateNoWindow = false;
  
          psi.UseShellExecute = false;
  
          var process = new Process { StartInfo = psi };
  
          process.Start();
  
          process.WaitForExit();

  gives the following error :

  Unrecognized option 'i emp.mp3 -f wav -'
  Failed to set value '|' for option 'i emp.mp3 -f wav -'

• What can be the substitute for SDL to direct ffmpeg decoded videos to screen in IOS ?

  18 octobre 2012, par jAckOdE

  I making a iOS video player using ffmpeg, the flow likes this :

  Video File---> [FFMPEG Decoder] —> decoded frames —> [a media director] —> /iphone screen (full and partial)/

  A media director will handle the tasks of rendering decoded video frames to iOS ui (UIView, UIWindow etc), outputting audio samples to iOS speaker, and threads management.

  SDL is one of those libs, but SDL is mainly made for game making purpose and seem to be not really mature for iOS.

  What can be the substitute for SDL ?

• Revision 672ba3ddf5 : Unifying tile decoding for both direct and inverse tile order. Now tile decodin

  7 novembre 2013, par Dmitry Kovalev

  Changed Paths :
   Modify /vp9/decoder/vp9_decodframe.c

  
  
  Unifying tile decoding for both direct and inverse tile order.

  Now tile decoding consists of two stages :
  1. Find tile buffer start and its size, put this info into tile_buffers.
  2. Decode each tile based on information from tile_buffers.

  It seems that stage 1 can also be reused by multithreaded tile decoder.

  Change-Id : If0cdaefdd6d10bb41c63561346c9ae4cfac081dd