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diff --git a/libraries/phpvideotoolkit/adapters/ffmpeg-php/php-reader/src/ISO14496/Box/STSC.php b/libraries/phpvideotoolkit/adapters/ffmpeg-php/php-reader/src/ISO14496/Box/STSC.php
new file mode 100644
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+++ b/libraries/phpvideotoolkit/adapters/ffmpeg-php/php-reader/src/ISO14496/Box/STSC.php
@@ -0,0 +1,110 @@
+<?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: STSC.php 92 2008-05-10 13:43:14Z svollbehr $
+ */
+
+/**#@+ @ignore */
+require_once("ISO14496/Box/Full.php");
+/**#@-*/
+
+/**
+ * Samples within the media data are grouped into chunks. Chunks can be of
+ * different sizes, and the samples within a chunk can have different sizes.
+ * The <i>Sample To Chunk Box</i> table can be used to find the chunk that
+ * contains a sample, its position, and the associated sample description.
+ *
+ * The table is compactly coded. Each entry gives the index of the first chunk
+ * of a run of chunks with the same characteristics. By subtracting one entry
+ * here from the previous one, you can compute how many chunks are in this run.
+ * You can convert this to a sample count by multiplying by the appropriate
+ * samplesPerChunk.
+ *
+ * @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_STSC extends ISO14496_Box_Full
+{
+  /** @var Array */
+  private $_sampleToChunkTable = 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++)
+      $this->_sampleToChunkTable[$i] = array
+        ("firstChunk" =>
+           Transform::fromUInt32BE(substr($data, ($i - 1) * 12, 4)),
+         "samplesPerChunk" =>
+           Transform::fromUInt32BE(substr($data, $i * 12 - 8, 4)),
+         "sampleDescriptionIndex" =>
+           Transform::fromUInt32BE(substr($data, $i * 12 - 4, 4)));
+  }
+  
+  /**
+   * Returns an array of values. Each entry is an array containing the following
+   * keys.
+   *   o firstChunk -- an integer that gives the index of the first chunk in
+   *     this run of chunks that share the same samplesPerChunk and
+   *     sampleDescriptionIndex; the index of the first chunk in a track has the
+   *     value 1 (the firstChunk field in the first record of this box has the
+   *     value 1, identifying that the first sample maps to the first chunk).
+   *   o samplesPerChunk is an integer that gives the number of samples in each
+   *     of these chunks.
+   *   o sampleDescriptionIndex is an integer that gives the index of the sample
+   *     entry that describes the samples in this chunk. The index ranges from 1
+   *     to the number of sample entries in the {@link ISO14496_Box_STSD Sample
+   *     Description Box}.
+   *
+   * @return Array
+   */
+  public function getSampleToChunkTable()
+  {
+    return $this->_sampleToChunkTable;
+  }
+}