Manage video with PHP

By making a brief note in the script link there were some "problems", this script was probably set to .htaccess specific , ie it would have to be adjusted both need, same goes for Ngnix.

I assume this is due to the $_SERVER['PATH_INFO'] that is only generated by rewriting, except that with the experience that has line 4 it will not work ( SCRIPT_FILENAME ). Other than that the author put a set_time_limit(0); in the middle of the whille, which I think is redundancy. I can not say that this compromises the operation and I do not want to criticize anyone, I'm just stating that the script is made to work in a specific situation, I've re-scripted it to work with a simple GET (querystring):

<?php
set_time_limit(0); //Remove o limite

//Pega o mimetype
function mimeType($file)
{
    $mimetype = false;

    if (class_exists('finfo')) {//PHP5.4+
        $finfo     = finfo_open(FILEINFO_MIME_TYPE);
        $mimetype  = finfo_file($finfo, $file);
        finfo_close($finfo);
    } else if (function_exists('mime_content_type')) {//php5.3 ou inferiror
        $mimetype = mime_content_type($file);
    }

    return $mimetype;
}

if (empty($_GET['video'])) {
    die('Video não definido');
}

//Pega a URL do video
$file = 'videos/' . str_replace('../', '', $_GET['video']);

$mime = mimeType($file);

if (!$mime || strpos($mime, 'video/') !== 0) {
    die('Erro ao ler o video ou mime-type inválido');
}

$fp = fopen($file, 'rb');

$size   = filesize($file); // File size
$length = $size;           // Content length
$start  = 0;               // Start byte
$end    = $size - 1;       // End byte

header('Content-type: ' . $mime);
header('Accept-Ranges: 0-' . $length);

if (isset($_SERVER['HTTP_RANGE'])) {
    $c_start = $start;
    $c_end   = $end;

    list(, $range) = explode('=', $_SERVER['HTTP_RANGE'], 2);
    if (strpos($range, ',') !== false) {
        header('HTTP/1.1 416 Requested Range Not Satisfiable');
        header('Content-Range: bytes ' . $start . '-' . $end . '/' . $size);
        exit;
    }

    if ($range == '-') {
        $c_start = $size - substr($range, 1);
    } else {
        $range  = explode('-', $range);
        $c_start = $range[0];
        $c_end   = (isset($range[1]) && is_numeric($range[1])) ? $range[1] : $size;
    }

    $c_end = ($c_end > $end) ? $end : $c_end;

    if ($c_start > $c_end || $c_start > $size - 1 || $c_end >= $size) {
        header('HTTP/1.1 416 Requested Range Not Satisfiable');
        header('Content-Range: bytes ' . $start . '-' . $end . '/' . $size);
        exit;
    }

    $start  = $c_start;
    $end    = $c_end;
    $length = $end - $start + 1;
    fseek($fp, $start);
    header('HTTP/1.1 206 Partial Content');
}

header('Content-Range: bytes ' . $start . '-' . $end . '/' . $size);
header('Content-Length: ' . $length);

$buffer = 1024 * 8;
while (!feof($fp) && ($p = ftell($fp)) <= $end) {

    if ($p + $buffer > $end) {
        $buffer = $end - $p + 1;
    }

    echo fread($fp, $buffer);
    flush();
}

fclose($fp);

If the video address is based on a bank ID, you would need to adjust:

//Exemplo teórico, pode adaptar pro seu ORM ou mysqli, é apenas para esclarecer a lógica
$consulta = $pdo->prepare('SELECT filename FROM videos WHERE id = :id');

//Pega o ID pela QUERYSTRING
$consulta->bindValue(':id', $_GET['videoid'], PDO::PARAM_INT);

$consulta->execute();
$linha = $consulta->fetch(PDO::FETCH_ASSOC);

//Pega a URL do video
$file = 'videos/' . $linha['filename'];

  

Warning: I'm looking at the docs and a few things about HTTP to better understand the range, I'll fix any shortcomings in the script soon

Tests

In the chrome (opera) I bounded to 3G Fast (simulation), the HTML looked like this:

<video src="range.php?video=1.mp4" controls preload="none"></video><hr>
<video src="range.php?video=2.mp4" controls preload="none"></video><hr>
<video src="range.php?video=3.mp4" controls preload="none"></video><hr>

And in the console:

Igaveplayinthefirstvideoandthendraggedthecontrolforwardandresultedin:

I'mjustnotsurewhyIgeneratedmultiplerequests,butIthinkitmightbethatthescriptisstillnotperfectordownloadingthevideoafter"seek" depends on the machine and / or browser's CODECs of the internet).

Image of "seekbar":