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<?php
/**
* Copyright (c) 2013 Frank Karlitschek frank@owncloud.org
* Copyright (c) 2013 Georg Ehrke georg@ownCloud.com
* This file is licensed under the Affero General Public License version 3 or
* later.
* See the COPYING-README file.
*/
namespace OC\Preview;
function findBinaryPath($program) {
exec('command -v ' . escapeshellarg($program) . ' 2> /dev/null', $output, $returnCode);
if ($returnCode === 0 && count($output) > 0) {
return escapeshellcmd($output[0]);
}
return null;
}
// movie preview is currently not supported on Windows
if (!\OC_Util::runningOnWindows()) {
$isExecEnabled = \OC_Helper::is_function_enabled('exec');
$ffmpegBinary = null;
$avconvBinary = null;
if ($isExecEnabled) {
$avconvBinary = findBinaryPath('avconv');
if (!$avconvBinary) {
$ffmpegBinary = findBinaryPath('ffmpeg');
}
}
if($isExecEnabled && ( $avconvBinary || $ffmpegBinary )) {
class Movie extends Provider {
public static $avconvBinary;
public static $ffmpegBinary;
public function getMimeType() {
return '/video\/.*/';
}
public function getThumbnail($path, $maxX, $maxY, $scalingup, $fileview) {
// TODO: use proc_open() and stream the source file ?
$fileInfo = $fileview->getFileInfo($path);
$useFileDirectly = (!$fileInfo->isEncrypted() && !$fileInfo->isMounted());
if ($useFileDirectly) {
$absPath = $fileview->getLocalFile($path);
} else {
$absPath = \OC_Helper::tmpFile();
$handle = $fileview->fopen($path, 'rb');
// we better use 5MB (1024 * 1024 * 5 = 5242880) instead of 1MB.
// in some cases 1MB was no enough to generate thumbnail
$firstmb = stream_get_contents($handle, 5242880);
file_put_contents($absPath, $firstmb);
}
$result = $this->generateThumbNail($maxX, $maxY, $absPath, 5);
if ($result === false) {
$result = $this->generateThumbNail($maxX, $maxY, $absPath, 1);
if ($result === false) {
$result = $this->generateThumbNail($maxX, $maxY, $absPath, 0);
}
}
if (!$useFileDirectly) {
unlink($absPath);
}
return $result;
}
/**
* @param int $maxX
* @param int $maxY
* @param string $absPath
* @param string $tmpPath
* @param int $second
* @return bool|\OC_Image
*/
private function generateThumbNail($maxX, $maxY, $absPath, $second)
{
$tmpPath = \OC_Helper::tmpFile();
if (self::$avconvBinary) {
$cmd = self::$avconvBinary . ' -an -y -ss ' . escapeshellarg($second) .
' -i ' . escapeshellarg($absPath) .
' -f mjpeg -vframes 1 -vsync 1 ' . escapeshellarg($tmpPath) .
' > /dev/null 2>&1';
} else {
$cmd = self::$ffmpegBinary . ' -y -ss ' . escapeshellarg($second) .
' -i ' . escapeshellarg($absPath) .
' -f mjpeg -vframes 1' .
' -s ' . escapeshellarg($maxX) . 'x' . escapeshellarg($maxY) .
' ' . escapeshellarg($tmpPath) .
' > /dev/null 2>&1';
}
exec($cmd, $output, $returnCode);
if ($returnCode === 0) {
$image = new \OC_Image();
$image->loadFromFile($tmpPath);
unlink($tmpPath);
return $image->valid() ? $image : false;
}
unlink($tmpPath);
return false;
}
}
// a bit hacky but didn't want to use subclasses
Movie::$avconvBinary = $avconvBinary;
Movie::$ffmpegBinary = $ffmpegBinary;
\OC\Preview::registerProvider('OC\Preview\Movie');
}
}
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