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PHP VideoStream class for HTML5 video streaming
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<?php | |
/** | |
* Description of VideoStream | |
* | |
* @author Rana | |
* @link http://codesamplez.com/programming/php-html5-video-streaming-tutorial | |
*/ | |
class VideoStream | |
{ | |
private $path = ""; | |
private $stream = ""; | |
private $buffer = 102400; | |
private $start = -1; | |
private $end = -1; | |
private $size = 0; | |
function __construct($filePath) | |
{ | |
$this->path = $filePath; | |
} | |
/** | |
* Open stream | |
*/ | |
private function open() | |
{ | |
if (!($this->stream = fopen($this->path, 'rb'))) { | |
die('Could not open stream for reading'); | |
} | |
/*if ( !($this->stream = tmpfile()) ) { | |
fwrite($this->stream, $this->path); | |
rewind($this->stream); | |
die('Could not open stream for reading'); | |
// now your temp file is ready to be read. | |
}*/ | |
/*if ( !($this->stream = fopen('php://memory', 'wb+') ) ) { | |
fwrite($this->stream, $this->path); | |
rewind($this->stream); | |
die('Could not open stream for reading'); | |
}*/ | |
// now your in-memory file is ready to be read. | |
} | |
/** | |
* Set proper header to serve the video content | |
*/ | |
private function setHeader() | |
{ | |
ob_get_clean(); | |
header("Content-Type: video/mp4"); | |
header("Cache-Control: max-age=2592000, public"); | |
header("Expires: ".gmdate('D, d M Y H:i:s', time()+2592000) . ' GMT'); | |
header("Last-Modified: ".gmdate('D, d M Y H:i:s', @filemtime($this->path)) . ' GMT' ); | |
$this->start = 0; | |
$this->size = filesize($this->path); | |
$this->end = $this->size - 1; | |
header("Accept-Ranges: 0-".$this->end); | |
if (isset($_SERVER['HTTP_RANGE'])) { | |
$c_start = $this->start; | |
$c_end = $this->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 $this->start-$this->end/$this->size"); | |
exit; | |
} | |
if ($range == '-') { | |
$c_start = $this->size - substr($range, 1); | |
}else{ | |
$range = explode('-', $range); | |
$c_start = $range[0]; | |
$c_end = (isset($range[1]) && is_numeric($range[1])) ? $range[1] : $c_end; | |
} | |
$c_end = ($c_end > $this->end) ? $this->end : $c_end; | |
if ($c_start > $c_end || $c_start > $this->size - 1 || $c_end >= $this->size) { | |
header('HTTP/1.1 416 Requested Range Not Satisfiable'); | |
header("Content-Range: bytes $this->start-$this->end/$this->size"); | |
exit; | |
} | |
$this->start = $c_start; | |
$this->end = $c_end; | |
$length = $this->end - $this->start + 1; | |
fseek($this->stream, $this->start); | |
header('HTTP/1.1 206 Partial Content'); | |
header("Content-Length: ".$length); | |
header("Content-Range: bytes $this->start-$this->end/".$this->size); | |
} | |
else | |
{ | |
header("Content-Length: ".$this->size); | |
} | |
} | |
/** | |
* close curretly opened stream | |
*/ | |
private function end() | |
{ | |
fclose($this->stream); | |
exit; | |
} | |
/** | |
* perform the streaming of calculated range | |
*/ | |
private function stream() | |
{ | |
$i = $this->start; | |
set_time_limit(0); | |
while(!feof($this->stream) && $i <= $this->end) { | |
$bytesToRead = $this->buffer; | |
if(($i+$bytesToRead) > $this->end) { | |
$bytesToRead = $this->end - $i + 1; | |
} | |
$data = fread($this->stream, $bytesToRead); | |
echo $data; | |
flush(); | |
$i += $bytesToRead; | |
} | |
} | |
/** | |
* Start streaming video content | |
*/ | |
function start() | |
{ | |
$this->open(); | |
$this->setHeader(); | |
$this->stream(); | |
$this->end(); | |
} | |
} |
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