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• ffmpeg fails on conversion from .mov to .mp4 fails aT 98%

  3 avril 2013, par user2241249

  Our code is below. When converting a uploaded .mov to .mp4 the conversion halts at 98%.

  Almost all of our other preferred formats encode flawlessly. Anyone has any clue on where we went wrong ? We are struggling on this for a while now so we want to ask the experts, thanks in advance for any help.

  <?php
  
  $Path = dirname(__FILE__) . "/";
  
  $url = "http://" . $_SERVER['SERVER_NAME'] . str_replace('\\', '/', dirname($_SERVER['SCRIPT_NAME'])) . "/";
  
  
  
  session_start();
  
  include_once 'inc/config.inc.php';
  
  include_once 'common.php';
  
  include_once 'inc/ffmpegprogressbar.class.php';
  
  
  
  ob_flush();
  
  ?>
  
  
  
  
  
      
  
      
  
      <?php
  
  
  
  // Specifie Inputfile for FFMPEG
  
      $count = count($_SESSION['Files']);
  
  // $file  = array_pop($_SESSION['Files']);
  
  
  
      $FileInstance = array_pop($_SESSION['Files']);
  
      //$FileInstance = $_SESSION['Files'][0];
  
      $file = $FileInstance['FileName'];
  
      $passNeeded = $FileInstance['PassNeeded'];
  
      $fmt = $FileInstance['fmt'];
  
  
  
      $FFMPEGInput = $Path . 'data/' . $_SESSION['OldSession'] . "/" . $file;
  
  
  
      $timeUnique = time();
  
      //echo "Start:Session holds: ".$_SESSION["cstatus"].", cstatus var =   $cstatus";
  
  
  
  
  
    /*  if ($FileInstance['PassNeeded'] == 5) {
  
          $FFMPEGParams = "-r 1000 -ar 11025 -ab 32 -f $fmt -sameq -g 15 -s 1920x1080";
  
      } else if ($FileInstance['PassNeeded'] == 4) {
  
          $FFMPEGParams ="-r 1000 -ar 11025 -ab 32 -f $fmt -sameq -g 15 -s 1280x720";
  
      } else if ($FileInstance['PassNeeded'] == 3) {
  
          $FFMPEGParams = "-r 1000 -ar 11025 -ab 32 -f $fmt -sameq -g 15 -s 854x480";
  
      } else if ($FileInstance['PassNeeded'] == 2) {
  
          $FFMPEGParams = "-r 1000 -ar 11025 -ab 32 -f $fmt -sameq -g 15 -s 640x360";
  
      }
  
      */
  
  if($fmt=="flv"){
  
  if ($FileInstance['PassNeeded'] == 5) {
  
          $FFMPEGParams = "-r 1000 -ar 11025 -ab 32 -f $fmt -sameq -g 15 -s 1920x1080";
  
      } else if ($FileInstance['PassNeeded'] == 4) {
  
          $FFMPEGParams ="-r 1000 -ar 11025 -ab 32 -f $fmt -sameq -g 15 -s 1280x720";
  
      } else if ($FileInstance['PassNeeded'] == 3) {
  
          $FFMPEGParams = "-r 1000 -ar 11025 -ab 32 -f $fmt -sameq -g 15 -s 854x480";
  
      } else if ($FileInstance['PassNeeded'] == 2) {
  
          $FFMPEGParams = "-r 1000 -ar 11025 -ab 32 -f $fmt -sameq -g 15 -s 640x360";
  
      }
  
  }elseif($fmt=="mp4"){
  
  $FFMPEGParams = " -pix_fmt yuv420p -s 640x360";
  
  
  
  }elseif($fmt=="ogv"){
  
  $FFMPEGParams = " -acodec libvorbis -ac 2 -ab 96k -ar 44100 -b 125k -s 640x360";
  
  
  
  }elseif($fmt=="webm"){
  
  $FFMPEGParams = " -acodec libvorbis -ac 2 -ab 96k -ar 44100 -b 125k -s 640x360";
  
  //}elseif($fmt!==""){
  
  //-i %1 -s qvga -acodec libfaac -ar 22050 -ab 128k -vcodec libx264 -threads 0 -f   ipod %2
  
  //-vcodec mpeg4 -acodec aac output.mp4
  
  //$FFMPEGParams = "-r 20 -ar 44100 -ab 196 -f $fmt -s 480x351";
  
  }
  
      if ($FileInstance['PassNeeded'] > 2) {
  
          $FileInstance['PassNeeded'] = $FileInstance['PassNeeded'] - 1;
  
          array_unshift($_SESSION['Files'], $FileInstance);
  
      }
  
  
  
      $flv_rpath = 'data/' . $_SESSION['OldSession'] . "/" . $file. $timeUnique . ".".$fmt;
  
  
  
       $FFMPEGOutput = $FFMPEGInput . $timeUnique . ".$fmt";
  
  
  
      $_SESSION['ConvertedFiles'][$file][] = array('Pass' => $passNeeded, 'OutFile' => $file . $timeUnique . ".$fmt","fmt"=>$fmt);
  
  
  
  
  
  
  
      if (!$_GET["pkey"]) {
  
          $pkey = rand();
  
      } elseif (file_exists('log/' . $_GET["pkey"] . '.ffmpeg')) {
  
          $pkey = $_GET["pkey"];
  
      } else {
  
          $pkey = rand();
  
      }
  
  
  
  // initializing and create ProgressBar
  
      flush();
  
      $FFMPEGProgressBar = &new FFMPEGProgressBar();
  
      flush();
  
  // Show Progressbar
  
      if ($count > 0) {
  
          if ($FileInstance['PassNeeded'] < 3) {
  
          define('FFMPEG_LIBRARY', '/usr/local/bin/ffmpeg ');
  
          $extension = "ffmpeg";
  
          $extension_soname = $extension . "." . PHP_SHLIB_SUFFIX;
  
          $extension_fullname = PHP_EXTENSION_DIR . "/" . $extension_soname;
  
              if (!extension_loaded($extension)) {
  
                  dl($extension_soname) or die("Can't load extension $extension_fullname\n");
  
              }
  
              exec(FFMPEG_LIBRARY . " -y -i '" . $FFMPEGInput . "' -vframes 1 -ss 00:00:03 -an -vcodec png -f rawvideo -s 160x90 '$FFMPEGInput.png'");
  
          }
  
          $FFMPEGProgressBar->Show($pkey, $count, $url, $passNeeded, $file, $timeUnique,$fmt);
  
          if (!$_GET["pkey"] || !file_exists('log/' . $_GET["pkey"] . '.ffmpeg')) {
  
              flush();
  
              $FFMPEGProgressBar = &new FFMPEGProgressBar();
  
              flush();
  
              @$FFMPEGProgressBar->execFFMPEG($FFMPEGInput, $FFMPEGOutput, $FFMPEGParams, $pkey);
  
  
  
              flush();
  
              $_SESSION['new_space']["video"] = 'data/' . $_SESSION['OldSession'] . "/" . $file;
  
              $_SESSION['new_space']["{$FileInstance['name']}"] = $flv_rpath;
  
              $_SESSION['new_space']["session"] =   $_SESSION['OldSession'];
  
          }
  
      //echo "End:Session holds: ".$_SESSION["cstatus"].", cstatus var = $cstatus";
  
      } else {
  
  //  header("Location: $url" . "index.php" );
  
          echo "<code class="echappe-js">&lt;script type=\&quot;text/javascript\&quot;&gt;window.location.href=&amp;#39;&quot; . $url . &quot;&amp;#39;;&lt;/script&gt;
  No Input" ;
  
      }
  
  // ShowProgressbar
  
   ?>
  
  
  

• FFmpeg detecting the first frame after a commercial

  5 novembre 2013, par William Joe Baldwin

  I've been searching for a way to detect the very first frame after a commercial in FFmpeg.
  My recorder records TV shows, approximately 1 second before the sequence.
  Therefore the video file starts with few frames of the commercial.

  By checking the page below, it seems there is a way to detect scene changes :

  Extract Thumbnails of Every Camera Change on a Video File

  Does anyone know a way to rewrite the code from the link to get the first scene change as frame count ?

  Thanks !

• Audio decoding using ffms2(ffmegsource)

  1er mai 2013, par praks411

  I'm using ffms2(ffmpegsource) a wrapper around libav to get video and audio frame from a file.
  Video decoding is working fine. However I'm facing some issues with audio decoding.
  FFMS2 provide a simple function FFMS_GetAudio(FFMS_AudioSource *A, void *Buf, int64_t Start, int64_t Count, FFMS_ErrorInfo *ErrorInfo); api to get the decoded buffer. The decoded data is return in buffer provided by user.

  For single channel the data is interpretation is straight forward with data byte starting from first location of user buffer. However when it comes to two channel there are two possibilities the decoded data could be planar or interleaved depending upon sample format return by FFMS_GetAudioProperties. In my case the sample format is always planar which means that decoded data will in two sperate data plane data[0] and data[1]. And this is what is explained by libav/ffmpeg and also by portaudio which consider planar data to be in two separate data plane.

  However FFMS_GetAudio just take single buffer from user. So can I assume for planar data
  data[0] = buf, data[1] = buf + offset, where offset is half the length of buffer return by FFMS_GetAudio.

  FFMS does not provide any good document for this interpretation. It would be great help if some can provide more information on this.