Audio Params (#344)

* 🚀 video profile and level
* add missing getter
* add missing use statement
* add missing return $this
* 1 test fixed
* fix other tests and clean up
We MUST rewrite them. They are too complex when it comes to new features
* trim trailing whitespaces
* fix typo
* 🚀 support for additional params in audio

src/FFMpeg/Format/Profile.php

@@ -0,0 +1,22 @@
+<?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\Format;
+
+interface Profile {
+
+    const HIGH = 'high';
+
+    const MAIN = 'main';
+
+    const BASELINE = 'baseline';
+
+}