Added initial parameters

src/FFMpeg/Format/Video/DefaultVideo.php

@@ -35,6 +35,9 @@ abstract class DefaultVideo extends DefaultAudio implements VideoInterface
     /** @var Array */
     protected $additionalParamaters;
 
+    /** @var Array */
+    protected $initialParamaters;
+
     /**
      * {@inheritdoc}
      */
@@ -122,6 +125,31 @@ abstract class DefaultVideo extends DefaultAudio implements VideoInterface
         return $this;
     }
 
+    /**
+     * {@inheritdoc}
+     */
+    public function getInitialParameters()
+    {
+        return $this->initialParamaters;
+    }
+
+    /**
+     * Sets initial parameters.
+     *
+     * @param  array                    $initialParamaters
+     * @throws InvalidArgumentException
+     */
+    public function setInitialParameters($initialParamaters)
+    {
+        if (!is_array($initialParamaters)) {
+            throw new InvalidArgumentException('Wrong initialParamaters value');
+        }
+
+        $this->initialParamaters = $initialParamaters;
+
+        return $this;
+    }
+
     /**
      * {@inheritdoc}
      */