114 lines
4.2 KiB
PHP
114 lines
4.2 KiB
PHP
<?php
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/**
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* GNU social - a federating social network
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*
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* Plugin to make thumbnails of video files with ffmpeg/avconv
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*
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* PHP version 5
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*
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* LICENCE: This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* @category Plugin
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* @package GNUsocial
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* @author Mikael Nordfeldth <mmn@hethane.se>
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* @copyright 2014 Free Software Foundation http://fsf.org
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* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
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* @link https://www.gnu.org/software/social/
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*/
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if (!defined('GNUSOCIAL')) { exit(1); }
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/*
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* Dependencies:
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* ffmpeg/avconv (external program call)
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* php5-gd
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*
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* Todo:
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* Make sure we support ffmpeg too, so we're not super Debian oriented.
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*
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* Video support will depend on your ffmpeg/avconv.
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*/
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class VideoThumbnailsPlugin extends Plugin
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{
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const PLUGIN_VERSION = '2.0.0';
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/*
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* This function should only extract an image from the video stream
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* and disregard any cropping or scaling in the resulting file, as
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* that will be handled in the core thumbnail algorithm.
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*/
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public function onCreateFileImageThumbnailSource(File $file, &$imgPath, $media=null)
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{
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// The calling function might accidentally pass application/ogg videos.
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// If that's a problem, let's fix it in the calling function.
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if ($media !== 'video' || empty($file->filename)) {
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return true;
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}
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try {
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// Exception thrown if no thumbnail found
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$thumb = File_thumbnail::byFile($file, false);
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$imgPath = $thumb->getPath();
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// If getPath didn't throw an exception, we have a working locally stored thumbnail
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return false;
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} catch (NoResultException $e) {
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// Alright, no thumbnail found, so let's create one.
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} catch (InvalidFilenameException $e) {
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// I guess this means $thumb->filename is null? Shouldn't happen because $file->filename is not null, so delete it
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$thumb->delete();
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} catch (FileNotFoundException $e) {
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// Thumb file was not found, let's delete it.
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$thumb->delete();
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}
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// Let's save our frame to a temporary file. If we fail, remove it.
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$tmp_imgPath = tempnam(sys_get_temp_dir(), 'socialthumb-');
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$cmd = null;
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if (shell_exec('which ffmpeg')) {
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$cmd = 'ffmpeg';
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} elseif (shell_exec('which avconv')) {
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$cmd = 'avconv';
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} else {
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common_log(LOG_ERR, 'Neither ffmpeg nor avconv was found in your PATH. Cannot create video thumbnail.');
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return true;
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}
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$fullcmd = $cmd.' -y -i '.escapeshellarg($file->getPath()).' -vcodec mjpeg -vframes 1 -f image2 -an '.escapeshellarg($tmp_imgPath);
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common_debug(__METHOD__ . ' executing: '._ve($fullcmd));
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$result = exec($fullcmd);
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if (!getimagesize($tmp_imgPath)) {
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common_debug('exec of "avconv" produced a bad/nonexisting image it seems');
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@unlink($tmp_imgPath);
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return true;
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}
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$imgPath = $tmp_imgPath;
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return false;
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}
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public function onPluginVersion(array &$versions)
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{
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$versions[] = array('name' => 'Video Thumbnails',
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'version' => self::PLUGIN_VERSION,
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'author' => 'Mikael Nordfeldth',
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'homepage' => 'https://www.gnu.org/software/social/',
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'rawdescription' =>
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// TRANS: Plugin description.
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_m('Video thumbnail preview support.'));
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return true;
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}
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}
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