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• Converting video mp4 file to gif file in asp.net ?

  14 juillet 2018, par Jonny

  I am developing an web app in asp.net where I want to convert mp4 file to animated gif file. I created a sample in C# console app to test my logic where it worked smoothly but when I tried to implement the same logic in asp.net it is not working.

  I am using FFmpeg.exe to convert the videos.
  Here is my code that executes on Button Click. Any help would be appreciated.

  try
  
  {
  
      //srcLink = Session["videoPath"].ToString();
  
      System.Diagnostics.Process grabInfoProcess;
  
      grabInfoProcess = new System.Diagnostics.Process();
  
      grabInfoProcess.StartInfo.UseShellExecute = false;
  
      grabInfoProcess.StartInfo.RedirectStandardOutput = true;
  
      grabInfoProcess.StartInfo.RedirectStandardError = true;
  
      grabInfoProcess.StartInfo.CreateNoWindow = true;
  
      grabInfoProcess.StartInfo.FileName = Request.PhysicalApplicationPath + "FFmpeg\\ffmpeg.exe";
  
      grabInfoProcess.StartInfo.Arguments = "-ss 00:00:01 -t 00:00:15" + " -i " + Request.PhysicalApplicationPath + "videos\\test2.mp4" + " " + Request.PhysicalApplicationPath + "DestVideos\\animated.gif";
  
      //ffmpeg - i source_video.avi animated_gif.gif
  
      grabInfoProcess.Start();
  
      string output = grabInfoProcess.StandardOutput.ReadToEnd();
  
      string newoutput = grabInfoProcess.StandardError.ReadToEnd();
  
      grabInfoProcess.WaitForExit();
  
  
  
  }
  
  catch (Exception ex)
  
  {
  
      Page.ClientScript.RegisterStartupScript(this.GetType(), "scriptkey", "alert('" + ex.Message.ToString() + "');");
  
  }

• How to send written frames in real time/synchronized with FFmpeg and UDP ?

  20 juin 2018, par potu1304

  I wanted to nearly live stream my Unit game with FFmpeg to a simple client. I have one Unity game in which each frame is saved as an jpg image. These images are wrapped in ffmpeg and send over udp to a simple c# client where I use ffplay to play the stream. The problem is, that FFmpeg is wrapping the images way faster than the unity app can write them. So ffmpeg quits but Unity is still writing frames. Is there a way to set ffmpeg in a loop to wait for the next image or can I somehow make a for loop without call every time ffmpeg ?

  Here is my function from my capturing script in Unity :

  Process process;
  
      //BinaryWriter _stdin;
  
      public void encodeFrame()
  
      {
  
  
  
  
  
          ProcessStartInfo startInfo = new ProcessStartInfo();
  
  
  
          var basePath = Application.streamingAssetsPath + "/FFmpegOut/Windows/ffmpeg.exe";
  
  
  
  
  
          info.Arguments = "-re -i screen_%d.jpg -vcodec libx264 -r 24 -f mpegts udp://127.0.0.1:1100";
  
          info.RedirectStandardOutput = true;
  
          info.RedirectStandardInput = true;
  
          info.RedirectStandardError = true;
  
          info.CreateNoWindow = true;
  
          info.UseShellExecute = false;
  
          info.RedirectStandardError = true;
  
          UnityEngine.Debug.Log(string.Format(
  
              "Executing \"{0}\" with arguments \"{1}\".\r\n",
  
              info.FileName,
  
              info.Arguments));
  
          process = Process.Start(info);
  
          //_stdin = new BinaryWriter(process.StandardInput.BaseStream);
  
          process.WaitForExit();
  
          var outputReader = process.StandardError;
  
          string Error = outputReader.ReadToEnd();
  
          UnityEngine.Debug.Log(Error);
  
  
  
  }

  And here the function from my cs file from my simple windowsform application :

  private void xxxFFplay()
  
  {
  
      text = "start";
  
      byte[] send_buffer = Encoding.ASCII.GetBytes(text);
  
      sock.SendTo(send_buffer, endPoint);
  
      ffplay.StartInfo.FileName = "ffplay.exe";
  
      ffplay.StartInfo.Arguments = "udp://127.0.0.1:1100";
  
      ffplay.StartInfo.CreateNoWindow = true;
  
      ffplay.StartInfo.RedirectStandardOutput = true;
  
      ffplay.StartInfo.UseShellExecute = false;
  
  
  
      ffplay.EnableRaisingEvents = true;
  
      ffplay.OutputDataReceived += (o, e) => Debug.WriteLine(e.Data ?? "NULL", "ffplay");
  
      ffplay.ErrorDataReceived += (o, e) => Debug.WriteLine(e.Data ?? "NULL", "ffplay");
  
      ffplay.Exited += (o, e) => Debug.WriteLine("Exited", "ffplay");
  
      ffplay.Start();
  
  
  
      Thread.Sleep(500); // you need to wait/check the process started, then...
  
  
  
      // child, new parent
  
      // make 'this' the parent of ffmpeg (presuming you are in scope of a Form or Control)
  
      //SetParent(ffplay.MainWindowHandle, this.panel1.Handle);
  
  
  
      // window, x, y, width, height, repaint
  
      // move the ffplayer window to the top-left corner and set the size to 320x280
  
      //MoveWindow(ffplay.MainWindowHandle, -5, -300, 320, 280, true);
  
  
  
  }

  Does have somebody some ideas ? I am really stuck at this to create a somehow "live" stream.

  Best regards

• At least one output file must be specified

  11 mai 2015, par Desipicforu Blogspot

  I am using this command in ffmpeg

     ffmpeg -i test.flv -i /var/www/phpvibe/logo.gif -filter_complex "scale=1200:-1,overlay=0:0" -s 1280x720 -vcodec libx264 -s 640x360 -movflags test.mp4 2>&1

  But i am getting this

   string(42) "At least one output file must be specified"

  updated :-

  php code :-

   $output ='{ffmpeg-cmd} -i {input} -i /var/www/phpvibe/logo.gif -filter_complex "scale=1200:-1,overlay=0:0" -s 1280x720 -vcodec libx264 -s {ffmpeg-vsize} -threads 4 -movflags {output}.mp4 2>&1';

  Complete output :-

    array(33) {
  
    [0]=>
  
   string(83) "ffmpeg version git-2015-05-11-94c20de Copyright (c)  2000-2015 the FFmpeg developers"
  
   [1]=>
  
   string(51) "  built with gcc 4.6 (Ubuntu/Linaro 4.6.3-1ubuntu5)"
  
   [2]=>
  
  string(243) "  configuration: --enable-gpl --enable-libfaac --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-librtmp --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-nonfree --enable-version3"
  
  [3]=>
  
    string(40) "  libavutil      54. 23.101 / 54. 23.101"
  
  [4]=>
  
  string(40) "  libavcodec     56. 38.100 / 56. 38.100"
  
  [5]=>
  
  string(40) "  libavformat    56. 32.100 / 56. 32.100"
  
  [6]=>
  
  string(40) "  libavdevice    56.  4.100 / 56.  4.100"
  
  [7]=>
  
  string(40) "  libavfilter     5. 16.101 /  5. 16.101"
  
  [8]=>
  
  string(40) "  libswscale      3.  1.101 /  3.  1.101"
  
  [9]=>
  
  string(40) "  libswresample   1.  1.100 /  1.  1.100"
  
  [10]=>
  
  string(40) "  libpostproc    53.  3.100 / 53.  3.100"
  
  [11]=>
  
  string(47) "Trailing options were found on the commandline."
  
  [12]=>
  
  string(31) "Input #0, flv, from 'test.flv':"
  
  [13]=>
  
   string(11) "  Metadata:"
  
  [14]=>
  
  string(28) "    audiosize       : 150117"
  
   [15]=>
  
   string(26) "    canSeekToEnd    : true"
  
   [16]=>
  
   string(29) "    datasize        : 1015662"
  
   [17]=>
  
   string(26) "    hasAudio        : true"
  
   [18]=>
  
   string(27) "    hasCuePoints    : false"
  
   [19]=>
  
   string(26) "    hasKeyframes    : true"
  
   [20]=>
  
   string(26) "    hasMetadata     : true"
  
   [21]=>
  
   string(26) "    hasVideo        : true"
  
   [22]=>
  
   string(24) "    lasttimestamp   : 42"
  
   [23]=>
  
   string(72) "    metadatacreator : flvtool++ (Facebook, Motion project, dweatherford)"
  
   [24]=>
  
   string(25) "    totalframes     : 229"
  
   [25]=>
  
   string(28) "    videosize       : 856032"
  
   [26]=>
  
   string(59) "  Duration: 00:00:42.27, start: 0.066000, bitrate: 192 kb/s"
  
   [27]=>
  
   string(124) "    Stream #0:0: Video: h264 (High), yuv420p, 176x144 [SAR 12:11 DAR 4:3], 165 kb/s, 30.30 fps, 29.97 tbr, 1k tbn, 59.94 tbc"
  
   [28]=>
  
   string(64) "    Stream #0:1: Audio: aac (LC), 8000 Hz, stereo, fltp, 29 kb/s"
  
   [29]=>
  
   string(48) "Input #1, gif, from '/var/www/phpvibe/logo.gif':"
  
   [30]=>
  
  string(29) "  Duration: N/A, bitrate: N/A"
  
   [31]=>
  
   string(67) "    Stream #1:0: Video: gif, bgra, 90x55, 100 tbr, 100 tbn, 100 tbc"
  
   [32]=>
  
   string(42) "At least one output file must be specified"
  
  }
  
  int(1)