user2221276 user2221276 - 2 months ago 32
PHP Question

Reading mp4 files with PHP

I'm trying to read mp4 file with PHP and what I'm doing now is this:

<?php
header("Content-Length: filesize");
readfile('file.mp4');
?>


but this way I can't skip or even go back until the video is not loaded 100%. Of course when I read directly from the file (video.mp4) everything goes well.

Thanks.

cmc cmc
Answer

You need to implement the skipping functionality yourself in PHP. This is a code snippet that will do that.

<?php

$path = 'file.mp4';

$size=filesize($path);

$fm=@fopen($path,'rb');
if(!$fm) {
  // You can also redirect here
  header ("HTTP/1.0 404 Not Found");
  die();
}

$begin=0;
$end=$size;

if(isset($_SERVER['HTTP_RANGE'])) {
  if(preg_match('/bytes=\h*(\d+)-(\d*)[\D.*]?/i', $_SERVER['HTTP_RANGE'], $matches)) {
    $begin=intval($matches[0]);
    if(!empty($matches[1])) {
      $end=intval($matches[1]);
    }
  }
}

if($begin>0||$end<$size)
  header('HTTP/1.0 206 Partial Content');
else
  header('HTTP/1.0 200 OK');

header("Content-Type: video/mp4");
header('Accept-Ranges: bytes');
header('Content-Length:'.($end-$begin));
header("Content-Disposition: inline;");
header("Content-Range: bytes $begin-$end/$size");
header("Content-Transfer-Encoding: binary\n");
header('Connection: close');

$cur=$begin;
fseek($fm,$begin,0);

while(!feof($fm)&&$cur<$end&&(connection_status()==0))
{ print fread($fm,min(1024*16,$end-$cur));
  $cur+=1024*16;
  usleep(1000);
}
die();

More Performance

Note that this is not the most efficient way to do it, because the whole file needs to go through PHP, so you will just need to try how it goes for you.

Assuming the reason you want to do this is to restrict access, and you need more efficiency later, you can use a flag for the web server.

Apache with X-Sendfile module or lightty (nginx info here)

$path = 'file.mp4';
header("X-Sendfile: $path");
die();

This is a bit more advanced and you should only use it if you need it, but it is relaxing to know you have an upgrade option when you start out with something that is rather easy but has mediocre performance.