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diff --git a/libraries/phpvideotoolkit/adapters/ffmpeg-php/php-reader/src/ISO14496/Box/TREF.php b/libraries/phpvideotoolkit/adapters/ffmpeg-php/php-reader/src/ISO14496/Box/TREF.php
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+++ b/libraries/phpvideotoolkit/adapters/ffmpeg-php/php-reader/src/ISO14496/Box/TREF.php
@@ -0,0 +1,81 @@
+<?php
+/**
+ * PHP Reader Library
+ *
+ * Copyright (c) 2008 The PHP Reader Project Workgroup. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ *  - Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *  - Neither the name of the project workgroup nor the names of its
+ *    contributors may be used to endorse or promote products derived from this
+ *    software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ * @package    php-reader
+ * @subpackage ISO 14496
+ * @copyright  Copyright (c) 2008 The PHP Reader Project Workgroup
+ * @license    http://code.google.com/p/php-reader/wiki/License New BSD License
+ * @version    $Id: TREF.php 92 2008-05-10 13:43:14Z svollbehr $
+ */
+
+/**#@+ @ignore */
+require_once("ISO14496/Box.php");
+/**#@-*/
+
+/**
+ * The <i>Track Reference Box</i> provides a reference from the containing track
+ * to another track in the presentation. These references are typed. A {@link
+ * ISO14496_Box_HINT hint} reference links from the containing hint track to the
+ * media data that it hints. A content description reference {@link
+ * ISO14496_Box_CDSC cdsc} links a descriptive or metadata track to the content
+ * which it describes.
+ * 
+ * Exactly one Track Reference Box can be contained within the {@link
+ * ISO14496_Box_TRAK Track Box}.
+ *
+ * If this box is not present, the track is not referencing any other track in
+ * any way. The reference array is sized to fill the reference type box.
+ * 
+ * @package    php-reader
+ * @subpackage ISO 14496
+ * @author     Sven Vollbehr <svollbehr@gmail.com>
+ * @copyright  Copyright (c) 2008 The PHP Reader Project Workgroup
+ * @license    http://code.google.com/p/php-reader/wiki/License New BSD License
+ * @version    $Rev: 92 $
+ */
+final class ISO14496_Box_TREF extends ISO14496_Box
+{
+  /**
+   * Constructs the class with given parameters and reads box related data from
+   * the ISO Base Media file.
+   *
+   * @param Reader $reader The reader object.
+   */
+  public function __construct($reader = null, &$options = array())
+  {
+    parent::__construct($reader, $options);
+    $this->setContainer(true);
+    
+    if ($reader === null)
+      return;
+    
+    $this->constructBoxes();
+  }
+}