如何解析m3u8並得到不同的bitttrate子m3u8網址？

Question

任何人可以告訴我如何在PHP中我可以得到不同的比特率（分辨率）子m3u8網址，如果我們有主播放列表m3u8使用get_data方法？以下是我有來自get_data方法的數據，但我想獲得每個分辨率的m3u8網址。 有沒有人能告訴我這是怎么做到的？提前謝謝。

$returned_content = get_data(''.$m3u8Url);
/* gets the data from a URL */
function get_data($url) {
    $ch = curl_init();
    $timeout = 5;
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, $timeout);
    $data = curl_exec($ch);
    curl_close($ch);
    return $data;
}

主播放列表m3u8：

  #EXTM3U
    #EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=1628000,RESOLUTION=852x480,CODECS="avc1.77.30,mp4a.40.2"
    http://me.mysite.com/media/l3/ertetertyrtut34534234324f3esrere/erewewrwrtf34324343443243434344/test1.mpegts/playlist-dfasdfasdfaw4q3243241.m3u8
    #EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=128000,RESOLUTION=256x144,CODECS="avc1.66.30,mp4a.40.2"
    http://me.mysite.com/media/l3/ertetertyrtut34534234324f3esrere/fgdhgfhgjhghfdsdf45454545345435/test1.mpegts/playlist-adfdfghgjdt5t45454542.m3u8
    #EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=464000,RESOLUTION=426x240,CODECS="avc1.77.30,mp4a.40.2"
    http://me.mysite.com/media/l3/ertetertyrtut34534234324f3esrere/764563564565445fsdf4r3dfdfdffdf/test1.mpegts/playlist-eertyeryry564534rrtr3.m3u8
    #EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=828000,RESOLUTION=640x360,CODECS="avc1.77.30,mp4a.40.2"
    http://me.mysite.com/media/l3/ertetertyrtut34534234324f3esrere/fgsfdgdfgfdg5435345456745264554/test1.mpegts/playlist-fgsfghdghjt4353454544.m3u8
    #EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=2128000,RESOLUTION=1024x576,CODECS="avc1.77.30,mp4a.40.2"
    http://me.mysite.com/media/l3/ertetertyrtut34534234324f3esrere/sfdgsdfgfdgfdgfdgfd465436546576/test1.mpegts/playlist-fghdjhygjujdfgsaf4455.m3u8
    #EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=3692000,RESOLUTION=1280x720,CODECS="avc1.64001f,mp4a.40.2"
    http://me.mysite.com/media/l3/ertetertyrtut34534234324f3esrere/sfdghgjyuktyurty546565466453645/test1.mpegts/playlist-safdghhgfjjyj45345546.m3u8

Answer 1

首先，您需要獲取數據源，然后處理它們（ explode()值，因為您的樣本數據在換行符中），然后將它們分組為兩個，最后循環它們。 考慮這個例子：

<?php

$curl_output = '#EXTM3U
    #EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=1628000,RESOLUTION=852x480,CODECS="avc1.77.30,mp4a.40.2"
    http://me.mysite.com/media/l3/ertetertyrtut34534234324f3esrere/erewewrwrtf34324343443243434344/test1.mpegts/playlist-dfasdfasdfaw4q3243241.m3u8
    #EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=128000,RESOLUTION=256x144,CODECS="avc1.66.30,mp4a.40.2"
    http://me.mysite.com/media/l3/ertetertyrtut34534234324f3esrere/fgdhgfhgjhghfdsdf45454545345435/test1.mpegts/playlist-adfdfghgjdt5t45454542.m3u8
    #EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=464000,RESOLUTION=426x240,CODECS="avc1.77.30,mp4a.40.2"
    http://me.mysite.com/media/l3/ertetertyrtut34534234324f3esrere/764563564565445fsdf4r3dfdfdffdf/test1.mpegts/playlist-eertyeryry564534rrtr3.m3u8
    #EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=828000,RESOLUTION=640x360,CODECS="avc1.77.30,mp4a.40.2"
    http://me.mysite.com/media/l3/ertetertyrtut34534234324f3esrere/fgsfdgdfgfdg5435345456745264554/test1.mpegts/playlist-fgsfghdghjt4353454544.m3u8
    #EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=2128000,RESOLUTION=1024x576,CODECS="avc1.77.30,mp4a.40.2"
    http://me.mysite.com/media/l3/ertetertyrtut34534234324f3esrere/sfdgsdfgfdgfdgfdgfd465436546576/test1.mpegts/playlist-fghdjhygjujdfgsaf4455.m3u8
    #EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=3692000,RESOLUTION=1280x720,CODECS="avc1.64001f,mp4a.40.2"
    http://me.mysite.com/media/l3/ertetertyrtut34534234324f3esrere/sfdghgjyuktyurty546565466453645/test1.mpegts/playlist-safdghhgfjjyj45345546.m3u8';

// process the string
$pieces = explode("\n", $curl_output); // make an array out of curl return value
unset($pieces[0]); // remove #EXTM3U
$pieces = array_map('trim', $pieces); // remove unnecessary space
$pieces = array_chunk($pieces, 2); // group them by two's

?>

格式化的片段應如下所示：

Array
(
    [0] => Array
    (
        [0] => #EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=1628000,RESOLUTION=852x480,CODECS="avc1.77.30,mp4a.40.2"
        [1] => http://me.mysite.com/media/l3/ertetertyrtut34534234324f3esrere/erewewrwrtf34324343443243434344/test1.mpegts/playlist-dfasdfasdfaw4q3243241.m3u8
    )

    [1] => Array
    (
        [0] => #EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=128000,RESOLUTION=256x144,CODECS="avc1.66.30,mp4a.40.2"
        [1] => http://me.mysite.com/media/l3/ertetertyrtut34534234324f3esrere/fgdhgfhgjhghfdsdf45454545345435/test1.mpegts/playlist-adfdfghgjdt5t45454542.m3u8
    )
    ...

然后，在html循環和它們上面，並在循環內部處理鏈接：

<?php foreach($pieces as $key => $value): ?>
    <a href="<?php echo $value[1]; ?>">Watch this in 
        <?php
        $value[0] = explode(',', $value[0]);
        foreach($value[0] as $index => $element) {
            if(stripos($element, 'RESOLUTION') !== false) {
                echo $element;
            }
        }
        ?>
    </a><br/>
<?php endforeach; ?>

HTML標記現在看起來應該是這樣的：

<a href="http://me.mysite.com/media/l3/ertetertyrtut34534234324f3esrere/erewewrwrtf34324343443243434344/test1.mpegts/playlist-dfasdfasdfaw4q3243241.m3u8">Watch this in 
    RESOLUTION=852x480  </a>
<a href="http://me.mysite.com/media/l3/ertetertyrtut34534234324f3esrere/fgdhgfhgjhghfdsdf45454545345435/test1.mpegts/playlist-adfdfghgjdt5t45454542.m3u8">Watch this in 
    RESOLUTION=256x144  </a>

Answer 2

如果我理解了正確的排隊，你需要解析一個字符串並獲得解決方案。

function findResolution($string){
    $array = explode(",",$string);
    foreach ($array as $item){
        if (strpos($item,"RESOLUTION")!==false){
            return str_replace("RESOLUTION=","",$item);
        }
    }
}

Answer 3

為什么不fopen / fgets？

function parseHLS($file) {
    $return = array();
    $i = 0;
    $handle = fopen($file, "r");
    if($handle) {
        while(($line = fgets($handle)) !== FALSE) {
            if(strpos($line,"EXT-X-STREAM-INF") !== FALSE) {
                if ($c=preg_match_all ("/.*?(BANDWIDTH)(.*?)(,)(RESOLUTION)(.*?)(,)/is", $line, $matches)) {
                    $return['data'][$i]['bandwidth'] = str_replace("=","",$matches[2][0]);
                    $return['data'][$i]['resolution'] = str_replace("=","",$matches[5][0]);
                }
            }
            if(strpos($line,".ts") !== FALSE) {
                $return['data'][$i]['url'] = str_replace(array("\r","\n"),"",$line);
                $i++;
            }
        }
        fclose($handle);
    }
    return $return;
}

這將為您提供一個帶有帶寬，分辨率和url鍵的數組，用於原始文件中的每次迭代。