diff --git a/src/FFMpeg/Filters/Video/PadFilter.php b/src/FFMpeg/Filters/Video/PadFilter.php
index 551604c..df19a2d 100644
--- a/src/FFMpeg/Filters/Video/PadFilter.php
+++ b/src/FFMpeg/Filters/Video/PadFilter.php
@@ -53,7 +53,7 @@ class PadFilter implements VideoFilterInterface
         $commands = array();
 
         $commands[] = '-vf';
-        $commands[] = 'pad=' . $this->dimension->getWidth() . ':' . $this->dimension->getHeight() . ':(' . $this->dimension->getWidth() . '-iw)/2:(' . $this->dimension->getHeight() .'-ih)/2';
+        $commands[] = 'scale=iw*min(' . $this->dimension->getWidth() . '/iw\,' . $this->dimension->getHeight() .'/ih):ih*min(' . $this->dimension->getWidth() . '/iw\,' . $this->dimension->getHeight() .'/ih),pad=' . $this->dimension->getWidth() . ':' . $this->dimension->getHeight() . ':(' . $this->dimension->getWidth() . '-iw)/2:(' . $this->dimension->getHeight() .'-ih)/2';
 
         return $commands;
     }