我正在尝试通过 PHP 在 Safari 上制作 .webm 流。由于某种原因,我在 Safari 中看到一个空的视频播放器。在其他浏览器上运行良好。
有 Safari 发出的所有请求及其请求和响应标头的屏幕截图:
从我迄今为止所做的研究中,我知道当服务器不支持 Range 标头时 Safari 会出现问题。
我已经通过运行
curl --range 0-99 http://localhost/video/play.php -o /dev/null
测试了我的案例,结果显示我的服务器支持自定义范围。
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 100 100 100 0 0 2889 0 --:--:-- --:--:-- --:--:-- 3571
参考:[iOS 上资源加载失败,插件处理加载](iOS 资源加载失败,插件处理加载
localhost/video/play.php (with webm file)
- 仅适用于 Chrome
localhost/video/play.php (with mp4 file)
- 适用于 Chrome 和 Safari
localhost/video/test.mp4
- 适用于 Chrome 和 Safari
localhost/video/test.webm
- 适用于 Chrome 和 Safari
video
├── play.php (index file, passes the video file to the VideoStream.php)
├── VideoStream.php (The class for php streaming)
├── test.mp4
└── test.webm
Play.php
<?php
include "VideoStream.php";
// $filePath = './test.mp4';
$filePath = './test.webm';
$stream = new VideoStream($filePath);
$stream->start();
VideoStream.php
<?php
/**
* Description of VideoStream
*
* @author Rana
* @link http://codesamplez.com/programming/php-html5-video-streaming-tutorial
*/
class VideoStream
{
private $path = "";
private $extension = "";
private $stream = "";
private $buffer = 102400;
private $start = -1;
private $end = -1;
private $size = 0;
function __construct($filePath)
{
$this->path = $filePath;
$this->extension = pathinfo($filePath)['extension'];
}
/**
* Open stream
*/
private function open()
{
if (!($this->stream = fopen($this->path, 'rb'))) {
die('Could not open stream for reading');
}
}
/**
* Set proper header to serve the video content
*/
private function setHeader()
{
ob_get_clean();
$this->start = 0;
$this->size = filesize($this->path);
$this->end = $this->size - 1;
header("Content-Type: video/" . $this->extension);
header("Cache-Control: max-age=2592000, public");
header("Expires: " . gmdate('D, d M Y H:i:s', time() + 2592000) . ' GMT');
header("Last-Modified: " . gmdate('D, d M Y H:i:s', @filemtime($this->path)) . ' GMT');
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();
$this->end();
}
}
我确实使用 NGINX,不确定这是否会引起问题,但以防万一我将配置保留在
/video/
位置:
location /video/ {
alias /var/www/video/;
index index.html;
error_page 404 /usr/share/nginx/html/index.html;
location ~ \.php$ {
fastcgi_split_path_info ^(.+\.php)(/.+)$;
fastcgi_pass video:9000;
include fastcgi_params;
fastcgi_param SCRIPT_FILENAME $request_filename;
fastcgi_param PATH_INFO $fastcgi_path_info;
}
try_files $uri $uri/ /index.php$is_args$args /index.php =404;
autoindex on;
}
编辑:仍在寻找解决方案。
我发现 Safari 仅当 URI 路径以
.webm
结尾时才支持 webm 文件(查询参数不算) - 至少在 macOS Ventura 上