+<?php
+/**
+ * GNU social - a federating social network
+ *
+ * Plugin to make thumbnails of video files with ffmpeg
+ *
+ * PHP version 5
+ *
+ * LICENCE: This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ * @category Plugin
+ * @package GNUsocial
+ * @author Mikael Nordfeldth <mmn@hethane.se>
+ * @copyright 2014 Free Software Foundation http://fsf.org
+ * @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
+ * @link https://www.gnu.org/software/social/
+ */
+
+if (!defined('GNUSOCIAL')) { exit(1); }
+
+/*
+ * Dependencies:
+ * php5-ffmpeg
+ * php5-gd
+ *
+ * Video support will depend on your ffmpeg.
+ */
+
+class VideoThumbnailsPlugin extends Plugin
+{
+ /*
+ * This function should only extract an image from the video stream
+ * and disregard any scaling aspects in the resulting file, since
+ * this will be handled in the core thumbnail algorithm.
+ */
+ public function onCreateFileImageThumbnail(MediaFile $file, &$imgPath, $media=null)
+ {
+ // This might accidentally pass application/ogg videos.
+ // If that's a problem, let's fix it in the calling function.
+ if ($media !== 'video') {
+ return true;
+ }
+
+ $movie = new ffmpeg_movie($file->getPath(), false);
+
+ $frames = $movie->getFrameCount();
+ if ($frames > 0) {
+ $frame = $movie->getFrame(floor($frames/2));
+ } else {
+ $frame = $movie->getNextKeyFrame();
+ }
+
+ // We failed to get a frame.
+ if ($frame === null) {
+ return true;
+ }
+
+ // Let's save our frame to a temporary file. If we fail, remove it.
+ $imgPath = tempnam(sys_get_temp_dir(), 'socialthumb');
+ if (!imagejpeg($frame->toGDImage(), $imgPath)) {
+ @unlink($imgPath);
+ return true;
+ }
+ return false;
+ }
+
+ public function onPluginVersion(&$versions)
+ {
+ $versions[] = array('name' => 'Video Thumbnails',
+ 'version' => GNUSOCIAL_VERSION,
+ 'author' => 'Mikael Nordfeldth',
+ 'homepage' => 'https://www.gnu.org/software/social/',
+ 'rawdescription' =>
+ // TRANS: Plugin description.
+ _m('HTML5 media attachment support'));
+ return true;
+ }
+}
+