ffmpeg issues

[Macman1993]

I just tried using ffmpeg for the first time and after a bit of tinkering I got the following code to make a copy of "video.avi" converted to "video.flv" then I tried using it to do some html5 converting which didn't work (I don't think I have the right version for html5) but now my original code wont work for converting the avi to flv. Does anyone know what could be causing my problem?

ffmpeg command

<?php

   define('FFMPEG_LIBRARY', '/usr/local/bin/ffmpeg ');
   $exec_string = FFMPEG_LIBRARY.' -i video.avi video.flv';
   exec($exec_string);
?>

Edit: Never mind, I figured out my issue feel free to delete this thread.