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diff --git a/libraries/phpvideotoolkit/adapters/ffmpeg-php/php-reader/src/ISO14496/Box/CTTS.php b/libraries/phpvideotoolkit/adapters/ffmpeg-php/php-reader/src/ISO14496/Box/CTTS.php
new file mode 100644
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--- /dev/null
+++ b/libraries/phpvideotoolkit/adapters/ffmpeg-php/php-reader/src/ISO14496/Box/CTTS.php
@@ -0,0 +1,99 @@
+<?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: CTTS.php 92 2008-05-10 13:43:14Z svollbehr $
+ */
+
+/**#@+ @ignore */
+require_once("ISO14496/Box/Full.php");
+/**#@-*/
+
+/**
+ * The <i>Composition Time to Sample Box</i> provides the offset between
+ * decoding time and composition time. Since decoding time must be less than the
+ * composition time, the offsets are expressed as unsigned numbers such that
+ * CT(n) = DT(n) + CTTS(n) where CTTS(n) is the (uncompressed) table entry for
+ * sample n.
+ *
+ * The composition time to sample table is optional and must only be present if
+ * DT and CT differ for any samples. Hint tracks do not use this 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_CTTS extends ISO14496_Box_Full
+{
+  /** @var Array */
+  private $_compositionOffsetTable = array();
+  
+  /**
+   * 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, &$options = array())
+  {
+    parent::__construct($reader, $options);
+    
+    $entryCount = $this->_reader->readUInt32BE();
+    $data = $this->_reader->read
+      ($this->getOffset() + $this->getSize() - $this->_reader->getOffset());
+    for ($i = 1; $i <= $entryCount; $i++)
+      $this->_compositionOffsetTable[$i] = array
+        ("sampleCount" =>
+           Transform::fromUInt32BE(substr($data, ($i - 1) * 8, 4)),
+         "sampleOffset" =>
+           Transform::fromUInt32BE(substr($data, $i * 8 - 4, 4)));
+  }
+  
+  /**
+   * Returns an array of values. Each entry is an array containing the following
+   * keys.
+   *   o sampleCount -- an integer that counts the number of consecutive samples
+   *     that have the given offset.
+   *   o sampleOffset -- a non-negative integer that gives the offset between CT
+   *     and DT, such that CT(n) = DT(n) + CTTS(n).
+   *
+   * @return Array
+   */
+  public function getCompositionOffsetTable()
+  {
+    return $this->_compositionOffsetTable;
+  }
+}