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sources/lib/private/preview/movies.php 2.44 KB
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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($program) {
  	exec('which ' . escapeshellarg($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()) {
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  	$isExecEnabled = \OC_Helper::is_function_enabled('exec');
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  	$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 ?
  				$absPath = \OC_Helper::tmpFile();
  				$tmpPath = \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);
  
  				if (self::$avconvBinary) {
  					$cmd = self::$avconvBinary . ' -an -y -ss 5'.
  						' -i ' . escapeshellarg($absPath) .
  						' -f mjpeg -vframes 1 -vsync 1 ' . escapeshellarg($tmpPath) .
  						' > /dev/null 2>&1';
  				}
  				else {
  					$cmd = self::$ffmpegBinary . ' -y -ss 5' .
  						' -i ' . escapeshellarg($absPath) .
  						' -f mjpeg -vframes 1' .
  						' -s ' . escapeshellarg($maxX) . 'x' . escapeshellarg($maxY) .
  						' ' . escapeshellarg($tmpPath) .
  						' > /dev/null 2>&1';
  				}
  
  				exec($cmd, $output, $returnCode);
  
  				unlink($absPath);
  
  				if ($returnCode === 0) {
  					$image = new \OC_Image();
  					$image->loadFromFile($tmpPath);
  					unlink($tmpPath);
  					return $image->valid() ? $image : false;
  				}
  				return false;
  			}
  		}
  
  		// a bit hacky but didn't want to use subclasses
  		Movie::$avconvBinary = $avconvBinary;
  		Movie::$ffmpegBinary = $ffmpegBinary;
  
  		\OC\Preview::registerProvider('OC\Preview\Movie');
  	}
  }