open(CONVERSION, '-|',
   mencoder     => $arg1,
   -oac         => 'mp3lame',
   -aid         => 128,
   -ovc         => 'xvid',
   -xvidencopts => 'bitrate=-1',
   -vf          => 'scale',
   -zoom,
   -xy          => 320,
   -o           => $arg2,
);