Add convenient Stream::getDimensions method to extract video dimension.

src/FFMpeg/Exception/LogicException.php

@@ -0,0 +1,16 @@
+<?php
+
+/*
+ * This file is part of PHP-FFmpeg.
+ *
+ * (c) Alchemy <info@alchemy.fr>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace FFMpeg\Exception;
+
+class LogicException extends \LogicException implements ExceptionInterface
+{
+}