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• Using ffmpeg for videoconference software

  12 novembre 2014, par Pavel

  I have to create a software capable of videoconferencing (through the server or peer-to-peer). I want to :
  1. Capture video and audio from webcum
  2. Compress (encode) it somehow and stream by TCP or UDP
  3. Receive packets from stream
  4. Decompress
  5. Play on a windows form.

  Can I do this with ffmpeg ? I couldn’t find examples of this in the docs ; so
  I would like to know whether it’s possible and if there are any examples
  avaiblable. I had thought of using H263 but any suggestions are welcomed.

  Thanks !

• Concatenate chunk containg headers to another chunk in h264

  18 novembre 2014, par Ortixx

  I’m trying to extract thumbnails from a torrent stream by downloading the first couple of chunks to get the headers, another set of chunks from the middle and then concat them to have a single video file.

  For this I’m using nodejs but I’m having trouble with the concatenation part. Obviously the headers include the length of the video so if I simply concat another chunk to the end of the headers chunk, it won’t work.

  In other words, I have 2 chunks of a video file : The first one contains the headers and some material and the other one is fully composed of a video stream. I want to combine the two to form a single video file
  So my question is how can I make this work properly if at all ?

• what is the good function php to deal with ffmpeg and progress bar [duplicate]

  17 mai 2014, par Abed Soliman

  This question already has an answer here :

  • ffmpeg Progress Bar - Encoding Percentage in PHP
    
    2 answers
    

  I ask about ffmpeg and progressbar

  I used exec function with ffmpeg and output the result to txt file

  and using some of code I found here to

  <center>
  
  
  
  
  
  
  
      &lt;?php 
  
  
  
      define('RAPIDLEECH', 'yes');
  
      define('CONFIG_DIR', 'configs/');
  
      require_once('configs/config.php');
  
      define ( 'TEMPLATE_DIR', 'templates/'.$options['template_used'].'/' );
  
      // Include other useful functions
  
      require_once('classes/other.php');
  
      error_reporting(0);
  
  
  
      login_check();
  
  
  
      include(TEMPLATE_DIR.'header.php');
  
  
  
      echo ('<br /><br /><br /><b>AudioXtractor</b>, un complemento <br /> que te permite extraer el audio de tus videos.<br /><br /><br />');
  
  
  
      putenv('GDFONTPATH=' . realpath('.')); ?>
  
  
  
      <br />
  
  
  
      <form method="post"><center>
  
      <table>
  
        <td>Movie:
  
      <select>
  
  
  
      &lt;?php
  
      $exts=array(".ac3", ".avi", ".f4v", ".flv", ".mkv", ".mov", ".mp4", ".mpg", ".mpeg", ".rmvb", ".srt", ".swf", ".wav", ".wmv");
  
      $ext="";
  
      function vidlist($dir) 
  
      {
  
      $results = array();
  
      $handler = opendir($dir);
  
      while ($file = readdir($handler)) 
  
      {
  
      if (strrchr($file,'.')!="")
  
      {
  
      $ext=strtolower(strrchr($file,'.'));
  
      }
  
      if ($file != '.' &amp;&amp; $file != '..' &amp;&amp; in_array($ext,$GLOBALS["exts"]))
  
      {
  
      $results[] = $file;
  
      }
  
      }
  
      closedir($handler);
  
      sort($results);
  
      return $results;
  
      }
  
      function Output($command) {
  
      $output = array($command);
  
      exec($command.' 2>&amp;1', $output);
  
      return ($output);
  
      }
  
      $files = vidlist("./files/");
  
      foreach($files as $file)
  
      {
  
          echo '<option value="'.$file.'">'.$file.'</option>';
  
      }
  
  
  
      ?>
  
  
  
  
  
      </select></td></table>
  
  
  
      <br /> >
  
      New MP3's name: 
  
      <input type="text" value="nuevoaudio" /> 
  
      <br /> >
  
      <br />
  
      <br />
  
  
  
      <center><input type="submit" style="font-size:16px; font-weight:bold; cursor:pointer;" value="Extract" />
  
      
  
  
  
      </center></center></form>
  
  
  
  
  
      &lt;?php
  
      if ($_POST['video']!="")
  
  
  
          $video = 'files/';
  
          $video=array();     
  
          $video[0] = $_POST['video'];
  
  
  
      if ($_POST['nvdo']!="")
  
  
  
          $nvdo = 'files/';
  
          $nvdo=array();      
  
          $nvdo[0] = $_POST['nvdo'];
  
  
  
  
  
  
  
      foreach ($video as $vdo)
  
      foreach ($nvdo as $nvd)
  
  
  
      if (isset($_POST["analize"])) {
  
  
  
          exec("ffmpeg -i files/$vdo -ab 192k files/$nvd.mp3 -y 2> files/$nvd.txt");
  
  
  
          $ext=strtolower(strrchr($vdo,'.'));
  
  
  
      /////////////////////////////////////////////////////my code //////////////////////////////////////////
  
  
  
      $content = @file_get_contents("files/$nvd.txt");
  
  
  
  
  
          //get duration of source
  
          preg_match("/Duration: (.*?), start:/", $content, $matches);
  
  
  
          $rawDuration = $matches[1];
  
  
  
          //rawDuration is in 00:00:00.00 format. This converts it to seconds.
  
          $ar = array_reverse(explode(":", $rawDuration));
  
          $duration = floatval($ar[0]);
  
          if (!empty($ar[1])) $duration += intval($ar[1]) * 60;
  
          if (!empty($ar[2])) $duration += intval($ar[2]) * 60 * 60;
  
  
  
          //get the time in the file that is already encoded
  
          preg_match_all("/time=(.*?) bitrate/", $content, $matches);
  
  
  
          $rawTime = array_pop($matches);
  
  
  
          //this is needed if there is more than one match
  
          if (is_array($rawTime)){$rawTime = array_pop($rawTime);}
  
  
  
          //rawTime is in 00:00:00.00 format. This converts it to seconds.
  
          $ar = array_reverse(explode(":", $rawTime));
  
          $time = floatval($ar[0]);
  
          if (!empty($ar[1])) $time += intval($ar[1]) * 60;
  
          if (!empty($ar[2])) $time += intval($ar[2]) * 60 * 60;
  
  
  
          //calculate the progress
  
          $progress = round(($time/$duration) * 100);
  
  
  
  
  
  
  
  
  
          echo '<br /><br />¡Su video fue convertido correctamente! <br /><br />Link al archivo:';
  
  
  
          echo ' <a href="http://stackoverflow.com/feeds/tag/files/'.$nvd.'.mp3">'.$nvd.'.mp3</a><br />' . "<br />";
  
          echo "Duration: " . $duration . "<br />";
  
          echo "Current Time: " . $time . "<br />";
  
          echo "Progress: " . $progress . "%" . "<br />";
  
  
  
      //////////////////////////////////////my coed //////////////////////////////////////////////
  
      }
  
  
  
      ?>
  
      <br /><br /><a href="http://stackoverflow.com/feeds/tag/index.php">Volver al RapidLeech</a>
  
  
  
      <br /><br /><br />Formatos Aceptados: <br /><b>.ac3, .avi, .f4v, .flv, .mkv, .mov, .mp3,<br /> .mp4, .mpg, .mpeg, .rmvb, .srt, .swf, .wav, .wmv</b>
  
      <br /><br />
  
      </center>
  
  
  
      &lt;?php
  
  
  
  
  
  
  
      ?>

  so i ask some one he told me the exec stop php script and never give me

  You can't get the progress directly if you are using exec, because the php script is stopped until ffmpeg closes. (Because exec returns the whole execution output)
  
  
  
  You should use popen, for being able to get the output from the process in real time (without reading any file) for parse and show the progressbar
  
  
  
  Here is a example for get the output: 
  
  
  
  When you get the progress info from ffmpeg, you can use your code for parse it and show your progressbar

  this is my popen script

  <?php 
  
  
  
  $handle = popen ("ffmpeg.exe -i files/fz.mp4 -ab 192k files/vdf.mp3 2>&1 ", 'r');
  
  $handles = (string)$handle;
  
  $line = "";
  
  
  
  while (false !== ($char = fgetc($handle)))
  
  {
  
    if ($char == "\r")
  
    {
  
      // You could now parse the $line for status information.
  
      echo "$line\n";
  
      $line = "";
  
    } else {
  
      $line .= $char;
  
    }
  
    ob_flush();
  
    flush();
  
  }
  
  pclose ($handle);
  
  
  
  
  
      //get duration of source
  
      preg_match("/Duration: (.*?), start:/", $handles, $matches);
  
  
  
      $rawDuration = $matches[1];
  
  
  
      //rawDuration is in 00:00:00.00 format. This converts it to seconds.
  
      $ar = array_reverse(explode(":", $rawDuration));
  
      $duration = floatval($ar[0]);
  
      if (!empty($ar[1])) $duration += intval($ar[1]) * 60;
  
      if (!empty($ar[2])) $duration += intval($ar[2]) * 60 * 60;
  
  
  
      //get the time in the file that is already encoded
  
      preg_match_all("/time=(.*?) bitrate/", $handles, $matches);
  
  
  
      $rawTime = array_pop($matches);
  
  
  
      //this is needed if there is more than one match
  
      if (is_array($rawTime)){$rawTime = array_pop($rawTime);}
  
  
  
      //rawTime is in 00:00:00.00 format. This converts it to seconds.
  
      $ar = array_reverse(explode(":", $rawTime));
  
      $time = floatval($ar[0]);
  
      if (!empty($ar[1])) $time += intval($ar[1]) * 60;
  
      if (!empty($ar[2])) $time += intval($ar[2]) * 60 * 60;
  
  
  
      //calculate the progress
  
      $progress = round(($time/$duration) * 100);
  
  
  
  
  
  
  
  
  
      echo '<br /><br />¡Su video fue convertido correctamente! <br /><br />Link al archivo:';
  
  
  
  
  
      echo "Duration: " . $duration . "<br />";
  
      echo "Current Time: " . $time . "<br />";
  
      echo "Progress: " . $progress . "%" . "<br />";
  
  
  
  //////////////////////////////////////my coed //////////////////////////////////////////////
  
  
  
  ?>

  so i dont under stand what is good for ffmpeg progressbAR

  is exec or popen

  so please give me hints for ffmpeg real time progressbar

  what is good for progressbar

  is html5 progress bar

  or javascript progress bar