Video Watermark problem

<?php
/*
* Gallery - a web based photo album viewer and editor
* Copyright (C) 2000-2008 Bharat Mediratta
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 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
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.
*/

/**
* This ItemAddOption adds a watermark on movie thumbnails.
* @package Ffmpeg
* @subpackage UserInterface
* @author Alan Harder <alan.harder@sun.com>
* @version $Revision: 17580 $
*/
class MovieThumbnailOption extends ItemAddOption {

/**
* @see ItemAddOption::isAppropriate
*/
function isAppropriate() {
list ($ret, $useWatermark) =
GalleryCoreApi::getPluginParameter('module', 'ffmpeg', 'useWatermark');
if ($ret) {
return array($ret, null);
}
list ($ret, $toolkit) = GalleryCoreApi::getToolkitByOperation('image/jpeg', 'composite');
if ($ret) {
return array($ret, null);
}
return array(null, $useWatermark && isset($toolkit));
}

/**
* @see ItemAddOption::handleRequestAfterAdd
*/
function handleRequestAfterAdd($form, $items) {
$errors = $warnings = $movieIds = $thumbIds = array();
foreach ($items as $item) {
if (GalleryUtilities::isA($item, 'GalleryMovieItem')) {
$movieIds[] = $item->getId();
}
}
if (!empty($movieIds)) {
list ($ret, $thumbTable) = GalleryCoreApi::fetchThumbnailsByItemIds($movieIds);
if ($ret) {
return array($ret, null, null);
}
foreach ($thumbTable as $itemId => $thumbnail) {
$thumbIds[] = $thumbnail->getId();
}
}
if (empty($thumbIds)) {
return array(null, $errors, $warnings);
}
list ($ret, $lockId) = GalleryCoreApi::acquireWriteLock($thumbIds);
if ($ret) {
return array($ret, null, null);
}

$op = 'composite|plugins_data/modules/ffmpeg/playmovie.png,image/png,150,113';
foreach ($thumbTable as $itemId => $thumbnail) {
list ($ret, $thumbnail) = $thumbnail->refresh();
if ($ret) {
GalleryCoreApi::releaseLocks($lockId);
return array($ret, null, null);
}

/*
* Set operations not postFilter so if this item is selected as an album highlight
* then the highlight will get the watermark too.
*/
$operations = $thumbnail->getDerivativeOperations();
$operations .= (empty($operations) ? '' : ';') . "$op,top-left,0,0;$op,top-right,0,0";
$thumbnail->setDerivativeOperations($operations);

$ret = $thumbnail->save();
if ($ret) {
GalleryCoreApi::releaseLocks($lockId);
return array($ret, null, null);
}
}

$ret = GalleryCoreApi::releaseLocks($lockId);
if ($ret) {
return array($ret, null, null);
}

return array(null, $errors, $warnings);
}
}
?>