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• Why does ffmpeg never finish when converting a video from my web app ?

  30 septembre 2011, par Mike

  I am trying to convert a video when the user submits a form. It seems to convert ok but the file "is being used by another proccess" when I try to do anything with it. It looks like ffmpeg.exe never exits. My code is below is there anything I should be doing different to allow the process to release the file ? If I run this manually it exits fine.

  internal class ConversionUtility : Utility
  
  {
  
      public void Convert(string videoFileName)
  
      {
  
          var video = new VideoFile(videoFileName);
  
  
  
          if (!video.infoGathered)
  
              GetVideoInfo(video);
  
  
  
          var Params = string.Format("-y -i \"{0}\" -coder ac -me_method full -me_range 16 -subq 5 -sc_threshold 40 -vcodec libx264 -cmp +chroma -partitions +parti4x4+partp8x8+partb8x8 -i_qfactor 0.71 -keyint_min 25 -b_strategy 1 -g 250 -r 20 \"{1}\"", video.Path, Path.ChangeExtension(videoFileName,".mp4"));
  
          //var Params = string.Format("-y -i \"{0}\" -acodec libfaac -ar 44100 -ab 96k -coder ac -me_method full -me_range 16 -subq 5 -sc_threshold 40 -vcodec libx264 -s 1280x544 -b 1600k -cmp +chroma -partitions +parti4x4+partp8x8+partb8x8 -i_qfactor 0.71 -keyint_min 25 -b_strategy 1 -g 250 -r 20 c:\\output3.mp4", video.Path, videoFileName);
  
          //var Params = String.Format(" {0} \"{1}\"",this.FFmpegLocation, video.Path);
  
  
  
          var threadStart = new ParameterizedThreadStart(del => RunProcess(Params));
  
          var thread = new Thread(threadStart);
  
          thread.Start();            
  
          //RunProcess(Params);
  
      }
  
  }
  
  
  
  internal class Utility
  
  {
  
      public string FFmpegLocation { get; set; }        
  
      private string WorkingPath { get { return Path.GetDirectoryName(FFmpegLocation); } }
  
  
  
      protected string RunProcess(string Parameters)
  
      {
  
          //create a process info
  
          var oInfo = new ProcessStartInfo(this.FFmpegLocation, Parameters)
  
          {
  
              UseShellExecute = false,
  
              CreateNoWindow = true,
  
              RedirectStandardOutput = true,
  
              RedirectStandardError = true
  
          };
  
  
  
          //Create the output and streamreader to get the output
  
          string output = null; StreamReader srOutput = null;
  
  
  
          //try the process
  
          try
  
          {
  
              //run the process
  
              Process proc = System.Diagnostics.Process.Start(oInfo);
  
  
  
              proc.WaitForExit();
  
              //if (!proc.WaitForExit(10000))
  
              //    proc.Kill();
  
  
  
  
  
              //get the output
  
              srOutput = proc.StandardError;
  
  
  
              //now put it in a string
  
              output = srOutput.ReadToEnd();
  
  
  
              proc.Close();
  
          }
  
          catch (Exception)
  
          {
  
              output = string.Empty;
  
          }
  
          finally
  
          {
  
              //now, if we succeded, close out the streamreader
  
              if (srOutput != null)
  
              {
  
                  srOutput.Close();
  
                  srOutput.Dispose();
  
              }
  
          }
  
          return output;
  
      }

• ffmpeg reencoding of flv files from MAC

  22 septembre 2011, par Nick Mitin

  I've recorded a video from a webcam on mac and now i'm trying to reencode it, but ffmpeg does not recognize audio stream :

  FFmpeg version git-120610e, Copyright (c) 2000-2010 the FFmpeg developers
    built on Sep 21 2010 15:56:57 with gcc 4.4.1
    configuration : —enable-gpl —enable-version3 —enable-nonfree —enable-postproc —enable-libopencore-amrnb —enable-libopencore-amrwb —enable-libtheora —enable-libvorbis —enable-libmp3lame —enable-libx264
    libavutil     50.27. 0 / 50.27. 0
    libavcore      0. 9. 0 /  0. 9. 0
    libavcodec    52.89. 0 / 52.89. 0
    libavformat   52.78. 5 / 52.78. 5
    libavdevice   52. 2. 2 / 52. 2. 2
    libavfilter    1.39. 0 /  1.39. 0
    libswscale     0.11. 0 /  0.11. 0
    libpostproc   51. 2. 0 / 51. 2. 0
  [flv @ 0x1e79470] Estimating duration from bitrate, this may be inaccurate
  Input #0, flv, from '10125174c09241f6536ccbe503ebbc00.flv' :
    Duration : 00:00:22.68, start : 0.000000, bitrate : N/A
      Stream #0.0 : Video : flv, yuv420p, 640x480, 1k tbr, 1k tbn, 1k tbc
      Stream #0.1 : Audio : [0][0][0][0] / 0x0000, 0 channels
  

  Is it possible to make ffmpeg to support audio stream form flv recorded on MAC ?

• Anomalie #2667 (En cours) : Bug PHP 5.4.0 rend HS des validations de formulaire (signature ajax in...

  19 avril 2012, par marcimat -

  Pour mémoire car cela risque d’être ennuyant quelques temps, dans certaines situations PHP 5.4.0 n’arrive pas à décoder une chaine qu’il a encodé avec gzdeflate / gzinflate. https://bugs.php.net/bug.php?id=61287 Les logs de SPIP disent alors : :Pri:info : signature ajax form incorrecte : (...)