public function video_ffmpeg_php::generate_thumbnails in Video 7

Generate video thumbs.

@todo Use php-ffmpeg API instead of run_command().

Overrides video_ffmpeg::generate_thumbnails

File

transcoders/video_ffmpeg_php.inc, line 30

Class

video_ffmpeg_php

Code

public function generate_thumbnails($video) {
  global $user;

  // Setup our thmbnail path.
  $video_thumb_path = variable_get('video_thumb_path', 'videos/thumbnails');

  // Get the file system directory.
  // @todo : get the field file system settings to this
  $schema_thumb_path = file_default_scheme() . '://' . $video_thumb_path . '/' . $video['fid'];
  file_prepare_directory($schema_thumb_path, FILE_CREATE_DIRECTORY);

  // Total thumbs to generate
  $total_thumbs = variable_get('video_thumbs', 5);
  $videofile = file_load($video['fid']);

  //get the actual video file path from the stream wrappers
  $videopath = drupal_realpath($videofile->uri);

  //get the playtime from the current transcoder
  $duration = $this
    ->get_playtime($videopath);
  $files = NULL;
  for ($i = 1; $i <= $total_thumbs; $i++) {
    $seek = $duration / $total_thumbs * $i - 1;

    //adding minus one to prevent seek times equaling the last second of the video
    $filename = file_munge_filename("video-thumb-" . $video['fid'] . "-{$i}.jpg", '', TRUE);
    $thumbfile = $schema_thumb_path . '/' . $filename;

    //skip files already exists, this will save ffmpeg traffic
    if (!is_file(drupal_realpath($thumbfile))) {

      // Use PHP-FFMPEG
      $movie = new ffmpeg_movie($videopath);
      $frames = $movie
        ->getFrameCount();
      $fps = $movie
        ->getFrameRate();

      // Get the right frame number
      $framenumber = (int) $seek * $fps;
      if ($framenumber > $frames) {
        $framenumber = $frames;
      }

      // Get the frame and create thumb file
      $frame = $movie
        ->getFrame($framenumber);
      $thumb = $frame
        ->toGDImage();
      imagejpeg($thumb, drupal_realpath($thumbfile));
      if (!file_exists(drupal_realpath($thumbfile))) {
        $error_param = array(
          '%file' => $thumbfile,
          '%cmd' => $command,
          '%out' => $command_output,
        );
        $error_msg = t("Error generating thumbnail for video: generated file %file does not exist.<br />Command Executed:<br />%cmd<br />Command Output:<br />%out", $error_param);

        // Log the error message.
        watchdog('transcoder', $error_msg, array(), WATCHDOG_ERROR);
        continue;
      }
    }

    // Begin building the file object.
    // @TODO : use file_munge_filename()
    $file = new stdClass();
    $file->uid = $user->uid;
    $file->status = 0;
    $file->filename = trim($filename);
    $file->uri = $thumbfile;
    $file->filemime = file_get_mimetype($filename);
    $file->filesize = filesize(drupal_realpath($thumbfile));
    $file->timestamp = time();
    $files[] = $file;
  }
  return $files;
}