thumbnail ffmpeg

Can anybody give a script which can dynamically create thumbnail from flv videos, so that i can do something like this

 <img src="thumbnail.php?file=video.flv&percentage=60" />

HTML:

 

<?
exec("ffmpeg -i ".$_GET[file]." -y -f image2 -ss 4 -t 0.001 -s 110x110 filename.jpg");
?>

PHP:

 

*COUGH*

http://uk2.php.net/manual/en/function.escapeshellarg.php
(Also, if you're going to end double quotes to put in the variable, use single quotes around the key name.)

Dan.