gnu-social/plugins/VideoThumbnails/VideoThumbnailsPlugin.php

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<?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 cropping or scaling in the resulting file, as
* that will be handled in the core thumbnail algorithm.
*/
public function onCreateFileImageThumbnailSource(File $file, &$imgPath, $media=null)
{
// The calling function might accidentally pass application/ogg videos.
// If that's a problem, let's fix it in the calling function.
if ($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('Video thumbnail preview support.'));
return true;
}
}