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<?php
/**
* @copyright Copyright (c) 2016, ownCloud, Inc.
*
* @author Alexander A. Klimov <grandmaster@al2klimov.de>
* @author Daniel Schneider <daniel@schneidoa.de>
* @author Georg Ehrke <oc.list@georgehrke.com>
* @author Joas Schilling <coding@schilljs.com>
* @author Morris Jobke <hey@morrisjobke.de>
* @author Olivier Paroz <github@oparoz.com>
* @author Robin Appelman <robin@icewind.nl>
* @author Roeland Jago Douma <roeland@famdouma.nl>
* @author Thomas Müller <thomas.mueller@tmit.eu>
*
* @license AGPL-3.0
*
* This code is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* 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, version 3,
* along with this program. If not, see <http://www.gnu.org/licenses/>
*
*/
namespace OC\Preview;
use OCP\Files\File;
use OCP\Files\FileInfo;
use OCP\IImage;
use Psr\Log\LoggerInterface;
class Movie extends ProviderV2 {
/**
* @deprecated 23.0.0 pass option to \OCP\Preview\ProviderV2
* @var string
*/
public static $avconvBinary;
/**
* @deprecated 23.0.0 pass option to \OCP\Preview\ProviderV2
* @var string
*/
public static $ffmpegBinary;
/** @var string */
private $binary;
/**
* {@inheritDoc}
*/
public function getMimeType(): string {
return '/video\/.*/';
}
/**
* {@inheritDoc}
*/
public function isAvailable(FileInfo $file): bool {
// TODO: remove when avconv is dropped
if (is_null($this->binary)) {
if (isset($this->options['movieBinary'])) {
$this->binary = $this->options['movieBinary'];
} elseif (is_string(self::$avconvBinary)) {
$this->binary = self::$avconvBinary;
} elseif (is_string(self::$ffmpegBinary)) {
$this->binary = self::$ffmpegBinary;
}
}
return is_string($this->binary);
}
/**
* {@inheritDoc}
*/
public function getThumbnail(File $file, int $maxX, int $maxY): ?IImage {
// TODO: use proc_open() and stream the source file ?
if (!$this->isAvailable($file)) {
return null;
}
$result = null;
if ($this->useTempFile($file)) {
// try downloading 5 MB first as it's likely that the first frames are present there
// in some cases this doesn't work for example when the moov atom is at the
// end of the file, so if it fails we fall back to getting the full file
$sizeAttempts = [5242880, null];
} else {
// size is irrelevant, only attempt once
$sizeAttempts = [null];
}
foreach ($sizeAttempts as $size) {
$absPath = $this->getLocalFile($file, $size);
$result = null;
if (is_string($absPath)) {
$result = $this->generateThumbNail($maxX, $maxY, $absPath, 5);
if ($result === null) {
$result = $this->generateThumbNail($maxX, $maxY, $absPath, 1);
if ($result === null) {
$result = $this->generateThumbNail($maxX, $maxY, $absPath, 0);
}
}
}
$this->cleanTmpFiles();
if ($result !== null) {
break;
}
}
return $result;
}
private function generateThumbNail(int $maxX, int $maxY, string $absPath, int $second): ?IImage {
$tmpPath = \OC::$server->getTempManager()->getTemporaryFile();
$binaryType = substr(strrchr($this->binary, '/'), 1);
if ($binaryType === 'avconv') {
$cmd = [$this->binary, '-y', '-ss', (string)$second,
'-i', $absPath,
'-an', '-f', 'mjpeg', '-vframes', '1', '-vsync', '1',
$tmpPath];
} elseif ($binaryType === 'ffmpeg') {
$cmd = [$this->binary, '-y', '-ss', (string)$second,
'-i', $absPath,
'-f', 'mjpeg', '-vframes', '1',
$tmpPath];
} else {
// Not supported
unlink($tmpPath);
return null;
}
$proc = proc_open($cmd, [1 => ['pipe', 'w'], 2 => ['pipe', 'w']], $pipes);
$returnCode = -1;
$output = "";
if (is_resource($proc)) {
$stdout = trim(stream_get_contents($pipes[1]));
$stderr = trim(stream_get_contents($pipes[2]));
$returnCode = proc_close($proc);
$output = $stdout . $stderr;
}
if ($returnCode === 0) {
$image = new \OCP\Image();
$image->loadFromFile($tmpPath);
if ($image->valid()) {
unlink($tmpPath);
$image->scaleDownToFit($maxX, $maxY);
return $image;
}
}
if ($second === 0) {
$logger = \OC::$server->get(LoggerInterface::class);
$logger->error('Movie preview generation failed Output: {output}', ['app' => 'core', 'output' => $output]);
}
unlink($tmpPath);
return null;
}
}
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