How to rotate video usinf ffmpeg?

Question

Hello,

My existing video is .mov and playing in vertically.but when I convert it to .flv using ffmpeg it will playing in horizontally which is wrong.how can I found converted video in vertical only.

function convert_flv($vidtime,$infile, $outfile, $w = 0, $h = 0, $extra_infile = '', $extra_outfile = '') {
  $parms = '';
  if($w == 0 && $h == 0) {
    //$parms .= '-sameq ';
  } else {
    $parms = '-s {$w}x{$h} ';
  }

  if($vidtime==60)
  {
    $cmd = ffmpeg($infile, $outfile, $parms.' '.$extra_infile, '-t 00:01:00 -ar 22050 -r 15 -f flv '.$extra_outfile);
  }
  else
  {
    $cmd = ffmpeg($infile, $outfile, $parms.' '.$extra_infile, '-t 00:04:00 -ar 22050 -r 15 -f flv '.$extra_outfile);
  }
  print_r($cmd);
  return $cmd;
}