我正在尝试流式传输 mp3 文件并通过 HTML5 音频标签播放它。
大约 2 分钟后，iOS 开始从头开始播放音频。我在 Safari @ iOS 11.4 上对此进行了测试。
下面是简化的代码:
文件:index.html
<!DOCTYPE html>
<html>
<body>
<audio controls><source src="audio.php" type="audio/mpeg"></audio>
</body>
</html>
文件:audio.php
header('Content-Type: audio/mpeg');
header('Content-Disposition: inline; filename="audio.mp3"');
header('X-Pad: avoid browser bug');
header('Cache-Control: no-cache');
readfile('audio.mp3');
- 如果我直接使用
audio.mp3文件，音频就可以工作 - 在所有其他设备/平台(Mac、Windows 和 Android 上的所有浏览器)上一切正常。
这个设置有什么问题？
如何正确地将音频流式传输到 iOS？
谢谢!
最佳答案
我遇到了同样的问题
这篇文章帮我解决了问题
https://mobiforge.com/design-development/content-delivery-mobile-devices
问题出在一些必须设置才能在 IOS 上工作的 header 参数上
//insert file path
$file = 'insert_file_path';
//audio/mpeg for mp3 file
$mime_type = 'audio/mpeg';
if (is_file($file)) {
header("Content-type: $mime_type");
if (isset($_SERVER['HTTP_RANGE'])) { // do it for any device that supports byte-ranges not only iPhone
rangeDownload($file);
} else {
header("Content-Length: " . filesize($file));
readfile($file);
}
}else {
// file not exist
// some error...
}
function rangeDownload($file) {
$fp = @fopen($file, 'rb');
$size = filesize($file); // File size
$length = $size; // Content length
$start = 0; // Start byte
$end = $size - 1; // End byte
// Now that we've gotten so far without errors we send the accept range header
/* At the moment we only support single ranges.
* Multiple ranges requires some more work to ensure it works correctly
* and comply with the spesifications: http://www.w3.org/Protocols/rfc2616/rfc2616-sec19.html#sec19.2
*
* Multirange support annouces itself with:
* header('Accept-Ranges: bytes');
*
* Multirange content must be sent with multipart/byteranges mediatype,
* (mediatype = mimetype)
* as well as a boundry header to indicate the various chunks of data.
*/
header("Accept-Ranges: 0-$length");
// header('Accept-Ranges: bytes');
// multipart/byteranges
// http://www.w3.org/Protocols/rfc2616/rfc2616-sec19.html#sec19.2
if (isset($_SERVER['HTTP_RANGE'])) {
$c_start = $start;
$c_end = $end;
// Extract the range string
list(, $range) = explode('=', $_SERVER['HTTP_RANGE'], 2);
// Make sure the client hasn't sent us a multibyte range
if (strpos($range, ',') !== false) {
// (?) Shoud this be issued here, or should the first
// range be used? Or should the header be ignored and
// we output the whole content?
header('HTTP/1.1 416 Requested Range Not Satisfiable');
header("Content-Range: bytes $start-$end/$size");
// (?) Echo some info to the client?
exit;
}
// If the range starts with an '-' we start from the beginning
// If not, we forward the file pointer
// And make sure to get the end byte if spesified
if ($range == '-') {
// The n-number of the last bytes is requested
$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;
}
/* Check the range and make sure it's treated according to the specs.
* http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html
*/
// End bytes can not be larger than $end.
$c_end = ($c_end > $end) ? $end : $c_end;
// Validate the requested range and return an error if it's not correct.
if ($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");
// (?) Echo some info to the client?
exit;
}
$start = $c_start;
$end = $c_end;
$length = $end - $start + 1; // Calculate new content length
fseek($fp, $start);
header('HTTP/1.1 206 Partial Content');
}
// Notify the client the byte range we'll be outputting
header("Content-Range: bytes $start-$end/$size");
header("Content-Length: $length");
// Start buffered download
$buffer = 1024 * 8;
while(!feof($fp) && ($p = ftell($fp)) <= $end) {
if ($p + $buffer > $end) {
// In case we're only outputtin a chunk, make sure we don't
// read past the length
$buffer = $end - $p + 1;
}
set_time_limit(0); // Reset time limit for big files
echo fread($fp, $buffer);
flush(); // Free up memory. Otherwise large files will trigger PHP's memory limit.
}
fclose($fp);
}
关于php - 流媒体 MP3 : iOS restarts HTML5 audio after 2 minutes，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/51115674/