Run ffmpeg command with php

Hi,

In my last article I have tackled the problem for ffmpeg
installation when u dont have YUM installed on your server,
on same day I have again faced problem with execution of
ffmpeg commands from php and I have found below solution
for this on google

array("pipe", "r"),  // stdin is a pipe that the child will
read from
     1 => array("pipe", "w"),  // stdout is a pipe that the child will
write to
     2 => array("pipe", "w") // stderr is a file to write to
 );

 $pipes= array();
 $process = proc_open($cmd, $descriptorspec, $pipes);

 $output= "";

 if (!is_resource($process)) return false;

 #close child's input imidiately
 fclose($pipes[0]);

 stream_set_blocking($pipes[1],false);
 stream_set_blocking($pipes[2],false);

 $todo= array($pipes[1],$pipes[2]);

 while( true ) {
     $read= array();
     if( !feof($pipes[1]) ) $read[]= $pipes[1];
     if( !feof($pipes[2]) ) $read[]= $pipes[2];

     if (!$read) break;

     $ready= stream_select($read, $write=NULL, $ex= NULL, 2);

     if ($ready === false) {
         break; #should never happen - something died
     }

     foreach ($read as $r) {
         $s= fread($r,1024);
         $output.= $s;
     }
 }

 fclose($pipes[1]);
 fclose($pipes[2]);

 $code= proc_close($process);

 return $output;
}