title: Mediainfo doesn't work with exec() function of php
body: <p>
  
  <p>$rt=passthru("/usr/bin/mediainfo ".$file );</p>
  
  <p>echo  $rt;</p>
  
  <p>?>
  it doesn't show anything even if it works in the cli
  i have linux ubuntu OS .
  thanks for all</p>