Extension:VideoSectionLink

<?php /**

These are the MediaWiki extensions we're using and/or developing. Please refer to the information on the mediawiki.org wiki for installation and usage details. Extensions here which have no corresponding mediawiki article are either not ready for use or have been superseded. You can also browse our extension code in our local Subversion repository or our GitHub mirror.

* VideoSectionLink extension - An extension to enable users to link to defined sections of video. Made with Template:Extension
*
* See http://www.mediawiki.org/wiki/Extension:VideoSectionLink for installation and usage details
*
* @package MediaWiki
* @subpackage Extensions
* @author User:Jack
* @copyright © 2008 User:Jack
* @licence GNU General Public Licence 2.0 or later
*/

if (!defined('MEDIAWIKI')) die('Not an entry point.');

define('VIDEOSECTIONLINK_VERSION', '0.0.1, 2008-10-31');

$egVideoSectionLinkMagic = 'videosection';

$wgExtensionFunctions[] = 'efSetupVideoSectionLink';

$wgHooks['LanguageGetMagic'][] = 'efVideoSectionLinkLanguageGetMagic';

$wgExtensionCredits['parserhook'][] = array(

'name' => 'VideoSectionLink',

'author' => 'User:Jack',

'description' => 'An extension to enable users to link to defined sections of video. Made with Template:Extension',

'url' => 'http://www.organicdesign.co.nz/Extension:VideoSectionLink',

'version' => VIDEOSECTIONLINK_VERSION

);

class VideoSectionLink {

/**

* Constructor

*/

function __construct() {

global $wgHooks, $wgParser, $egVideoSectionLinkMagic;

# Add the parser-function

$wgParser->setFunctionHook($egVideoSectionLinkMagic, array($this,'magicVideosectionlink'));

#Add the Unknownaction hook

$wgHooks['UnknownAction'][] = $this;

}

/**

* Expand the videosection-magic

*/

function magicVideosectionlink(&$parser, $url = , $start = ,$duration = ) {

global $egVideoSectionLinkMagic,$wgScript;

  		$text = "" . $wgScript . "?action=videosection&url=" . urlencode($url) . "&start=" . $start . "&duration=" .$duration . " Click to download video";

#print_r($text);

# Return result with available parser flags

return array(

$text,

'found' => true,

'nowiki' => false,

'noparse' => false,

'noargs' => false,

'isHTML' => false

);

}

/**

* Callback method executes a shell command returning the section of the movie requested

*/

function onUnknownAction($action, $article) {

global $wgOut,$action,$article,$wgRequest,$wgUploadDirectory;

#Get the parameters from the title

$param1 = $wgRequest->getText('url');

$param2 = $wgRequest->getText('start');

		$param3 = $wgRequest->getText('duration');

		#Execute the ffmpeg command

		$movieStr = "ffmpeg -i " . $param1 . " -ss " . $param2 . " -t " . $param3 . " -ar 22050 " . $wgUploadDirectory . "/winterfest03.mpg";

		$success = shell_exec($movieStr);

		#Set headers as video

$wgOut->disable();

header("Content-Type: video/mpeg");

$wgHfile = "Content-Disposition: attachment; filename=\"". $wgUploadDirectory . "/winterfest03.mpg\"";

header($wgHfile);

#Return the file as binary back to the client

readfile($wgUploadDirectory . "/winterfest03.mpg");

return true;

}

/**

* Needed in some versions to prevent Special:Version from breaking

*/

function __toString() { return __CLASS__; }

}

/**

* Called from $wgExtensionFunctions array when initialising extensions

*/

function efSetupVideoSectionLink() {

global $egVideoSectionLink;

$egVideoSectionLink = new VideoSectionLink();

}

/**

* Needed in MediaWiki >1.8.0 for magic word hooks to work properly

*/

function efVideoSectionLinkLanguageGetMagic(&$magicWords, $langCode = 0) {

global $egVideoSectionLinkMagic;

$magicWords[$egVideoSectionLinkMagic] = array($langCode, $egVideoSectionLinkMagic);

return true;

}