video - PHP pseudo streaming -

i have 2 problems php pseudo streaming

1. sometimes stuttering bit
2. don't work mp4 files

  $php_buffer=2;          $bitr_min=60;      $intv_max=0.6;        $bitr_max=300;      $intv_min=0.3;        $bitr=$bitr+$php_buffer;        if ($bitr<=$bitr_min) {        $packet_interval=$intv_max;      }      elseif ($bitr>=$bitr_max) {        $packet_interval=$intv_min;      }      else {        $packet_interval=$intv_max-(($intv_max-$intv_min)*($bitr-$bitr_min)/($bitr_max-$bitr_min));        $packet_interval=round($packet_interval*100)/100;      }      $packet_size=round($bitr*$packet_interval*1024);        $limit_bandwidth=$bitr;      $fsize = filesize($flv) - (($fseek > 0) ? $fseek  + 1 : 0);      set_time_limit(30+$fsize/($limit_bandwidth*1024));        if($no_cache) {      # prohibit caching (different methods different clients)      session_cache_limiter("nocache");      header("expires: thu, 19 nov 1981 08:52:00 gmt");      header("last-modified: " . gmdate("d, d m y h:i:s") . " gmt");      header("cache-control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0");      header("pragma: no-cache");    }      // flash video header    if (strpos($fname,'.flv'))      header("content-type: video/x-flv");    else      header("content-type: video/mp4");   ////  video/x-mp4    header("content-disposition: attachment; filename=\"" . $fname . "\"");    header("content-length: " . $fsize);      $fpr = fopen($flv, 'rb');    // flash video file format header    if($fseek != 0) {      echo 'flv'.pack('c', 1).pack('c', 1).pack('n', 9).pack('n', 9);    }      // seek file requested start    fseek($fpr, $fseek);      // start file output    while(!feof($fpr)) {      // bandwidth limiting      if($packet_interval > 0 && $limit_bandwidth) {        // start time        list($us, $s) = explode(' ', microtime());        $ts = ((float)$us + (float)$s);        // echo packet        echo fread($fpr, $packet_size);        // end time        list($us, $s) = explode(' ', microtime());        $tst = ((float)$us + (float)$s);        $tdi = $tst - $ts;        // wait, when output slower packet interval        if($tdi < (float)$packet_interval){          usleep((float)$packet_interval * 1000000 - (float)$tdi * 1000000);        }      }      else {        // output file without bandwidth limiting        echo fread($fpr, filesize($flv));      }    }

how resources kind of solution? in localhost have same results , not apache/php overloading on contrary take low resources.

please help.

to pseudo stream mp4 file on browser (including ipads/tablets) functionality working (seek forward, seek backwards , displays correct time).

try mp4streaming tuxxin github

also works fine longtail jwplayer 6 , html5 players.