php 输出视频流

  function PutMovie($file) {
      header("Content-type: video/mp4");
      header("Accept-Ranges: bytes");
      $size = (filesize($file));
      if(isset($_SERVER['HTTP_RANGE'])){
          header("HTTP/1.1 206 Partial Content");
          list($name, $range) = explode("=", $_SERVER['HTTP_RANGE']);
          list($begin, $end) =explode("-", $range);
          if($end == 0) $end = $size - 100;
      }
      else {
          $begin = 0; $end = $size - 100;
      }
      header("Content-Length: " . ($end - $begin + 1));
      header("Content-Disposition: filename=".basename($file));
      header("Content-Range: bytes ".$begin."-".$end."/".$size);
      $fp = fopen($file, 'rb');
      fseek($fp, $begin);
      while(!feof($fp)) {
          $p = min(1024, $end - $begin + 1);
          $begin += $p;
          echo fread($fp, $p);
      }
      fclose($fp);exit;
  }