' . check_plain($cmd['command']) . '

' . check_plain($cmd['output']) . '
';
      }

      watchdog('transcoder', 'FFmpeg failed to transcode %video. !errorlist !commandlist', array(
        '%video' => $this->settings['input']['filename'],
        '!errorlist' => theme('item_list', array('type' => 'ol', 'items' => $errorlist, 'title' => t('Reported errors'))),
        '!commandlist' => theme('item_list', array('type' => 'ol', 'items' => $commandoutput, 'title' => t('Executed commands and output')))
      ), WATCHDOG_ERROR);
      $this->errors['execute'] = $errorlist;
      $this->transcoder->reset(true);
      return FALSE;
    }

    // Post-process the file with qt-faststart
    $cmd = variable_get('video_ffmpeg_qtfaststart_path');

    if ($cmd != NULL && is_file($cmd) && $this->outputextension == 'mp4') {
      $qttmpfile = $tmpoutputpath . '-qt';
      $output = array();
      $retval = 0;
      exec($cmd . ' ' . escapeshellarg($tmpoutputpath) . ' ' . escapeshellarg($qttmpfile) . ' 2>&1', $output, $retval);

      // qt-faststart does not return an error code when it doesn't generate an output file,
      // so also check if the output file has been generated.
      if ($retval == 0 && file_exists($qttmpfile)) {
        drupal_unlink($tmpoutputpath);
        rename($qttmpfile, $tmpoutputpath);
      }
      else {
        watchdog('transcoder', 'Error while executing @cmdname on video @filename: @output', array('@cmdname' => 'qt-faststart', '@filename' => $this->realoutputname, '@output' => implode("\n", $output)), WATCHDOG_ERROR);
        if (file_exists($qttmpfile)) {
          drupal_unlink($qttmpfile);
        }
      }
    }

    // Post-process the file with flvtool2
    $cmd = variable_get('video_ffmpeg_flvtool2_path');
    if ($cmd != NULL && is_file($cmd) && $this->outputextension == 'flv') {
      $output = array();
      $retval = 0;
      exec($cmd . ' -U ' . escapeshellarg($tmpoutputpath) . ' 2>&1', $output, $retval);

      if ($retval != 0) {
        watchdog('transcoder', 'Error while executing @cmdname on video @filename: @output', array('@cmdname' => 'flvtool2', '@filename' => $this->realoutputname, '@output' => implode("\n", $output)), WATCHDOG_ERROR);
      }
    }

    $file_info = $this->getFileInfo();
    $realoutputuri = $this->realoutputdir . '/' . $this->realoutputname;
    copy($tmpoutputpath, $realoutputuri);
    drupal_unlink($tmpoutputpath);

    $output = new stdClass();
    $output->filename = $this->realoutputname;
    $output->uri = $realoutputuri;
    $output->filesize = $filesize;
    $output->timestamp = REQUEST_TIME;
    $output->jobid = NULL;
    $output->duration = floor($file_info['duration']['seconds']);

    return $output;
  }

  public function getFileInfo() {
    $file = $this->settings['input']['uri'];
    $cid = 'video:file:' . md5($file);
    $cache = cache_get($cid);
    if (!empty($cache->data)) {
      return $cache->data;
    }

    $data = $this->transcoder->getFileInfo();
    cache_set($cid, $data, self::INFO_CACHE, time() + 7 * 24 * 3600);
    return $data;
  }

  public function getCodecs() {
    $info = $this->getCachedFFmpegInfo();
    $codecs = array(
      'decode' => array('audio' => array(), 'video' => array()),
      'encode' => array('audio' => array(), 'video' => array()),
    );

    if (!empty($info['codecs'])) {
      foreach ($info['codecs'] as $key => $value) {
        $codecs['encode'][$key] = array();
        $codecs['decode'][$key] = array();
        foreach ($value as $codec_key => $codec) {
          if ($codec['encode']) {
            $codecs['encode'][$key][$codec_key] = $codec['fullname'];
          }
          if ($codec['decode']) {
            $codecs['decode'][$key][$codec_key] = $codec['fullname'];
          }
        }
        uasort($codecs['encode'][$key], 'strnatcasecmp');
        uasort($codecs['encode'][$key], 'strnatcasecmp');
      }
    }

    return $codecs;
  }

  public function getAvailableFormats($type = FALSE) {
    $info = $this->getCachedFFmpegInfo();
    if (empty($info['formats'])) {
      return array();
    }

    $formats = array();
    switch ($type) {
      case FALSE:
        return array_keys($info['formats']);
      case 'both' :
        foreach ($info['formats'] as $id => $data) {
          if ($data['mux'] === TRUE && $data['demux'] === TRUE) {
            $formats[$id] = $data['fullname'];
          }
        }
        break;
      case 'muxing' :
        foreach ($info['formats'] as $id => $data) {
          if ($data['mux'] === TRUE) {
            $formats[$id] = $data['fullname'];
          }
        }
        break;
      case 'demuxing' :
        foreach ($info['formats'] as $id => $data) {
          if ($data['demux'] === TRUE) {
            $formats[$id] = $data['fullname'];
          }
        }
        break;
    }

    if (isset($formats['ogg']) && !isset($formats['ogv'])) {
      $formats['ogv'] = $formats['ogg'];
      unset($formats['ogg']);
      asort($formats);
    }

    return $formats;
  }

  public function getPixelFormats() {
    $info = $this->getCachedFFmpegInfo();
    if (empty($info['pixelformats'])) {
      return array();
    }
    return array_keys($info['pixelformats']);
  }

  public function getVersion() {
    $info = $this->getCachedFFmpegInfo();
    if ($info['ffmpeg-found']) {
      $ffmpegoravconv = NULL;
      return self::getVersionFromOutput($info['raw'], $ffmpegoravconv);
    }

    return FALSE;
  }

  public function getName() {
    return 'FFmpeg / avconv';
  }

  public function getValue() {
    return 'TranscoderAbstractionFactoryFfmpeg';
  }

  public function adminSettings() {
    $form = array();

    $form['ffmpeg'] = array(
      '#type' => 'fieldset',
      '#title' => $this->getName(),
      '#collapsible' => FALSE,
      '#collapsed' => FALSE,
      '#states' => array(
        'visible' => array(
          ':input[name=video_convertor]' => array('value' => 'TranscoderAbstractionFactoryFfmpeg'),
        ),
      ),
    );

    $form['ffmpeg']['video_ffmpeg_path'] = array(
      '#type' => 'textfield',
      '#title' => t('Path to FFmpeg or avconv executable'),
      '#description' => t('Absolute path to the FFmpeg or avconv executable.') . ' ' . t('When you install a new FFmpeg version, please clear the caches to let Drupal detect the updated codec support.', array('@performance-page' => url('admin/config/development/performance'))),
      '#default_value' => variable_get('video_ffmpeg_path', '/usr/bin/ffmpeg'),
    );

    // Video thumbnails
    $form['ffmpeg']['video_thumbnail_path'] = array(
      '#type' => 'textfield',
      '#title' => t('Path to save thumbnails'),
      '#description' => t('Path to save video thumbnails extracted from videos.'),
      '#default_value' => variable_get('video_thumbnail_path', 'videos/thumbnails'),
    );
    $form['ffmpeg']['video_thumbnail_count'] = array(
      '#type' => 'textfield',
      '#title' => t('Number of thumbnails'),
      '#description' => t('Number of thumbnails to extract from video.'),
      '#default_value' => variable_get('video_thumbnail_count', 5),
      '#size' => 5,
    );

    // Video conversion settings.
    $form['ffmpeg']['helpers'] = array(
      '#type' => 'fieldset',
      '#title' => t('Helper programs'),
      '#collapsible' => TRUE,
      '#collapsed' => TRUE,
    );
    $form['ffmpeg']['helpers']['video_ffmpeg_qtfaststart_path'] = array(
      '#type' => 'textfield',
      '#title' => t('Path to qt-faststart'),
      '#default_value' => variable_get('video_ffmpeg_qtfaststart_path'),
      '#description' => t('When you enter the path to @toolname here, it will be run after any @filetype files are transcoded. It improves the loading time of @filetype videos. On Linux, the default for this field is %default_value.', array('@toolname' => 'qt-faststart', '@filetype' => 'MP4', '%default_value' => '/usr/bin/qt-faststart')),
    );
    $form['ffmpeg']['helpers']['video_ffmpeg_flvtool2_path'] = array(
      '#type' => 'textfield',
      '#title' => t('Path to flvtool2'),
      '#default_value' => variable_get('video_ffmpeg_flvtool2_path'),
      '#description' => t('When you enter the path to @toolname here, it will be run after any @filetype files are transcoded. It improves the loading time of @filetype videos. On Linux, the default for this field is %default_value.', array('@toolname' => 'flvtool2', '@filetype' => 'FLV', '%default_value' => '/usr/bin/flvtool2')),
    );

    return $form;
  }

  public function adminSettingsValidate($form, &$form_state) {
    $v =& $form_state['values'];

    if (!empty($v['video_ffmpeg_path'])) {
      $errorhelp = '';
      if (module_exists('video_ui')) {
        $errorhelp = '
' . t('Visit the FFmpeg debug page for information thay may help you find the cause of this problem.', array('@ffmpeg-debug-page' => url('admin/config/media/video/ffmpeg-info', array('query' => array('ffmpegpath' => $v['video_ffmpeg_path'])))));
      }

      $toolkit = new PHPVideoToolkit($v['video_ffmpeg_path']);
      $ffmpeg = $toolkit->getFFmpegInfo(FALSE);
      $ffmpegoravconv = NULL;
      if (!$ffmpeg['ffmpeg-found'] || ($version = self::getVersionFromOutput($ffmpeg['raw'], $ffmpegoravconv)) == NULL) {
        form_error($form['ffmpeg']['video_ffmpeg_path'], t('FFmpeg not found at %path. To convert videos and create thumbnails you have to install FFmpeg on your server. For more information please see the !documentation.' . $errorhelp, array('%path' => $v['video_ffmpeg_path'], '!documentation' => l(t('documentation'), 'http://video.heidisoft.com/documentation/ffmpeg-installtion-scripts'))));
      }
      elseif (empty($ffmpeg['codecs']['video']) || empty($ffmpeg['codecs']['audio'])) {
        form_error($form['ffmpeg']['video_ffmpeg_path'], t('FFmpeg version %version was found, but no supported codecs could be found. Please check whether FFmpeg and all support libraries have been installed correctly.' . $errorhelp, array('%version' => $version)));
      }
      else {
        drupal_set_message(t('%ffmpegoravconv version %version found on your system.', array('%version' => $version, '%ffmpegoravconv' => $ffmpegoravconv)), 'status');
      }

      // Clear FFmpeg information when the path has changed.
      cache_clear_all(self::INFO_CID, self::INFO_CACHE);
    }

    if (!empty($v['video_ffmpeg_qtfaststart_path'])) {
      if (!is_file($v['video_ffmpeg_qtfaststart_path'])) {
        form_error($form['ffmpeg']['helpers']['video_ffmpeg_qtfaststart_path'], t('The file %file does not exist.', array('%file' => $v['video_ffmpeg_qtfaststart_path'])));
      }
    }

    if (!empty($v['video_ffmpeg_flvtool2_path'])) {
      if (!is_file($v['video_ffmpeg_flvtool2_path'])) {
        form_error($form['ffmpeg']['helpers']['video_ffmpeg_flvtool2_path'], t('The file %file does not exist.', array('%file' => $v['video_ffmpeg_flvtool2_path'])));
      }
    }
  }

  /**
   * Returns a cached copy of PHPVideoToolkit::getFFmpegInfo()
   *
   * @return
   *   array of FFmpeg installation information.
   */
  private function getCachedFFmpegInfo() {
    $cache = cache_get(self::INFO_CID, self::INFO_CACHE);
    if (!empty($cache->data)) {
      return $cache->data;
    }

    $info = $this->transcoder->getFFmpegInfo(FALSE);
    cache_set(self::INFO_CID, $info, self::INFO_CACHE);
    return $info;
  }

  /**
   * Returns the FFmpeg version string from an output string.
   *
   * FFmpeg returns its version in the output of almost any call.
   *
   * Used instead of PHPVideoToolkit::getVersion(), because PHPVideoToolkit
   * has not been updated and does not support git versions.
   *
   * @param
   *   string containing output of ffmpeg -version
   * @return
   *   string containing version of FFmpeg
   */
  public static function getVersionFromOutput($output, &$ffmpegoravconv) {
    $version = NULL;
    $ffmpegoravconv = NULL;

    $matches = array();

    // Git check outs
    if (preg_match('/(ffmpeg|avconv) version N-\d+-g([a-f0-9]+)/', $output, $matches)) {
      $ffmpegoravconv = $matches[1];
      $version = 'git: ' . $matches[2];
    }

    // Git check outs
    elseif (preg_match('/(ffmpeg|avconv) version git-(\d{4}-\d{2}-\d{2}-[a-f0-9]+)/', $output, $matches)) {
      $ffmpegoravconv = $matches[1];
      $version = 'git: ' . $matches[2];
    }

    // Release
    elseif (preg_match('/(ffmpeg|avconv) version ([0-9.]+)/i', $output, $matches)) {
      $ffmpegoravconv = $matches[1];
      $version = $matches[2];
    }

    // Fallback to unrecognized string
    elseif (preg_match('/(ffmpeg|avconv) version ([^\n]+)/i', $output, $matches)) {
      $ffmpegoravconv = $matches[1];
      $version = $matches[2];
      if (($pos = strpos($version, ' Copyright')) !== FALSE) {
        $version = drupal_substr($version, 0, $pos);
      }
      $version = t('unrecognized: !version', array('!version' => $version));
    }

    if ($ffmpegoravconv == 'ffmpeg') {
      $ffmpegoravconv = 'FFmpeg';
    }

    return $version;
  }

  /**
   * Reset internal variables to their initial state.
   */
  public function reset($keepinput = FALSE) {
    parent::reset($keepinput);
    $this->transcoder->reset($keepinput);
    $this->multipass = NULL;
  }

  /**
   * Whether the transcoder works by sending jobs to an external system.
   *
   * True for transcoders like Zencoder, false for transcoders like FFmpeg.
   */
  public function isOffSite() {
    return FALSE;
  }

  /**
   * Set aspect ratio and size related transcoder options.
   */
  private function setAspectRatioOptions(array $options) {
    $targetdimensions = explode('x', $options['wxh'], 2);
    $file_info = $this->getFileInfo();
    $sourcedimensions = array(
      intval($file_info['video']['dimensions']['width']),
      intval($file_info['video']['dimensions']['height'])
    );

    // If no change is necessary, just return.
    if ($targetdimensions == $sourcedimensions) {
      return;
    }

    $targetaspect = round($targetdimensions[0] / $targetdimensions[1], 4);
    $sourceaspect = round($sourcedimensions[0] / $sourcedimensions[1], 4);

    $aspectmode = !empty($options['video_aspectmode']) ? $options['video_aspectmode'] : 'preserve';
    switch ($aspectmode) {
      default:
      case 'preserve':
        if ($sourceaspect >= $targetaspect) {
          // Source video is wider than destination.
          // Decrease the height.
          $factor = $targetdimensions[0] < $sourcedimensions[0] ? $targetdimensions[0] / $sourcedimensions[0] : $sourcedimensions[0] / $targetdimensions[0];
          $width = $targetdimensions[0];
          $height = round($sourcedimensions[1] * $factor);
        }
        else {
          $factor = $targetdimensions[1] < $sourcedimensions[1] ? $targetdimensions[1] / $sourcedimensions[1] : $sourcedimensions[1] / $targetdimensions[1];
          $width = round($sourcedimensions[0] * $factor);
          $height = $targetdimensions[1];
        }

        if ($width != $sourcedimensions[0] || $height != $sourcedimensions[1]) {
          $this->transcoder->addCommand('-vf', 'scale='.$width.':'.$height);
        }
        break;

      case 'crop':
        if ($sourceaspect >= $targetaspect) {
          // Source video is wider than destination.
          // Cut off left and right.
          $factor = $targetdimensions[1] < $sourcedimensions[1] ? $targetdimensions[1] / $sourcedimensions[1] : $sourcedimensions[1] / $targetdimensions[1];
          $width = round($factor * $sourcedimensions[0]);
          $height = $sourcedimensions[1];
        }
        else {
          $factor = $targetdimensions[0] < $sourcedimensions[0] ? $targetdimensions[0] / $sourcedimensions[0] : $sourcedimensions[0] / $targetdimensions[0];
          $width = $sourcedimensions[0];
          $height = round($factor * $sourcedimensions[1]);
        }
        $this->transcoder->addCommand('-vf', 'crop='.$width.':'.$height.',scale='.$targetdimensions[0].':'.$targetdimensions[1]);
        break;

      case 'pad':
        if ($sourceaspect >= $targetaspect) {
          // Source video is wider than destination.
          // Add padding to top and bottom.
          $factor = $targetdimensions[1] > $sourcedimensions[1] ? $targetdimensions[1] / $sourcedimensions[1] : $sourcedimensions[1] / $targetdimensions[1];
          $width = $sourcedimensions[0];
          $height = round($factor * $sourcedimensions[1]);
          $x = 0;
          $y = ($height - $sourcedimensions[1]) / 2;
        }
        else {
          $factor = $targetdimensions[0] > $sourcedimensions[0] ? $targetdimensions[0] / $sourcedimensions[0] : $sourcedimensions[0] / $targetdimensions[0];
          $width = round($factor * $sourcedimensions[0]);
          $height = $sourcedimensions[1];
          $x = ($width - $sourcedimensions[0]) / 2;
          $y = 0;
        }
        $this->transcoder->addCommand('-vf', 'pad='.$width.':'.$height.':'.$x.':'.$y.',scale='.$targetdimensions[0].':'.$targetdimensions[1]);
        break;

      case 'stretch':
        $result = $this->transcoder->setVideoDimensions($targetdimensions[0], $targetdimensions[1]);
        break;
    }
  }
}