来自静态文件的 HLS 直播
HLS live streaming from static files
我有一个客户端有数千个 audio/video 文件，它们在内部流式传输，所有文件都被分段 (.ts) 并保存在 S3 存储桶中，并在 SQL 数据库中包含适当的元数据。现在他们要求我创建两个 "live" 流，一个用于音频，一个用于视频，他们可以设置并忘记。
不想重新分割所有内容或连接我试图破解的所有文件 "live" m3u8 滑过已经存在的文件（它们都以完全相同的方式编码）。
我所做的是生成一个 "radio playlist" 以 40 秒的间隔（x3 .ts 每个 m3u8）保存到数据库中，每个标记有开始和结束时间以及适当的 EXT-X -媒体序列。然后我 select 在 NOW() 之间推送文件。
它可以工作，但有时时机是正确的，它会为第一个和最后一个文件命中相同的分组并缓冲。我可以完全控制播放器 (VideoJS) 和服务器以使其正常工作。
这是我目前的代码...我有什么方法可以让它工作吗？我还没有尝试在 vJS 上使用缓冲区（不知道如何...）
所有的基本文件信息都是这样存储在数据库中的
INSERT INTO `contenido_audio_hls` (`id`, `audio_s`, `duration`) VALUES ('f2z7dcwc0l7rleig', '["10.000000","10.000000","10.000000","10.000000","10.000000","10.000000","10.000000","10.000000","10.000000","10.000000","10.000000","10.000000","10.000000","10.000000","10.000000","10.000000","10.000000","10.000000","10.000000","4.100000"]', 10);
生成播放列表时，我拉出需要的数据
$radio = sql("SELECT lista_contenido.orden,lista_contenido.contenido,contenido_audio_hls.audio_s FROM lista_listas LEFT JOIN lista_contenido ON (lista_listas.id = lista_contenido.lista) LEFT JOIN contenido_audio_hls ON (lista_contenido.contenido = contenido_audio_hls.id) WHERE (lista_listas.tipo = 'radio') ORDER BY lista_contenido.orden ASC");
foreach($radio['data'] as $k=>$v) {
$arreglo = json_decode($v['audio_s'],TRUE);
foreach($arreglo as $kk=>$vv) {
$puro[] = array("extinf"=>'#EXTINF:'.$vv.',',"id"=>$v['contenido'],"segment"=>$kk);
}
}
我循环遍历它们以创建组
$segundos = 0;
$grupo = 1;
$contador = 1;
foreach($puro as $k=>$v) {
if($segundos <= 30) {
$m3u8[$grupo][] = $puro[$k];
$contador++;
} else {
$m3u8[$grupo][] = $puro[$k];
$grupo = $grupo + $contador;
$segundos = 0;
}
$segundos = $segundos + 10;
}
然后把它们放到自己的table
$largo = 0;
foreach($m3u8 as $k=>$v) {
$ini = sprintf('%02d:%02d:%02d',($largo/3600),($largo/60%60),$largo%60);
$localfin = $largo + 40;
$fin = sprintf('%02d:%02d:%02d',($localfin/3600),($localfin/60%60),$localfin%60);
$query = "INSERT INTO lista_m3u8 (ini,fin,tipo,sequence,data) VALUES('".$ini."','".$fin."','radio','".$k."','".json_encode($v)."')";
sql($query);
$largo = $largo + 40;
}
这给了我这个
INSERT INTO `lista_m3u8` (`ini`, `fin`, `tipo`, `sequence`, `data`) VALUES ('06:54:00', '06:54:40', 'radio', 580636, '[{"extinf":"#EXTINF:10.000000,","id":"f2z7de0quwgehw23","segment":14},{"extinf":"#EXTINF:10.000000,","id":"f2z7de0quwgehw23","segment":15},{"extinf":"#EXTINF:10.000000,","id":"f2z7de0quwgehw23","segment":16},{"extinf":"#EXTINF:10.000000,","id":"f2z7de0quwgehw23","segment":17}]');
INSERT INTO `lista_m3u8` (`ini`, `fin`, `tipo`, `sequence`, `data`) VALUES ('06:54:40', '06:55:20', 'radio', 582504, '[{"extinf":"#EXTINF:10.000000,","id":"f2z7de0quwgehw23","segment":18},{"extinf":"#EXTINF:10.000000,","id":"f2z7de0quwgehw23","segment":19},{"extinf":"#EXTINF:0.766667,","id":"f2z7de0quwgehw23","segment":20},{"extinf":"#EXTINF:10.000000,","id":"f2z7dft8c217xyp","segment":0}]');
INSERT INTO `lista_m3u8` (`ini`, `fin`, `tipo`, `sequence`, `data`) VALUES ('06:55:20', '06:56:00', 'radio', 584375, '[{"extinf":"#EXTINF:10.000000,","id":"f2z7dft8c217xyp","segment":1},{"extinf":"#EXTINF:10.000000,","id":"f2z7dft8c217xyp","segment":2},{"extinf":"#EXTINF:10.000000,","id":"f2z7dft8c217xyp","segment":3},{"extinf":"#EXTINF:10.000000,","id":"f2z7dft8c217xyp","segment":4}]');
INSERT INTO `lista_m3u8` (`ini`, `fin`, `tipo`, `sequence`, `data`) VALUES ('06:56:00', '06:56:40', 'radio', 586249, '[{"extinf":"#EXTINF:10.000000,","id":"f2z7dft8c217xyp","segment":5},{"extinf":"#EXTINF:10.000000,","id":"f2z7dft8c217xyp","segment":6},{"extinf":"#EXTINF:10.000000,","id":"f2z7dft8c217xyp","segment":7},{"extinf":"#EXTINF:10.000000,","id":"f2z7dft8c217xyp","segment":8}]');
然后生成m3u8
$audio = sql("SELECT sequence, data FROM lista_m3u8 WHERE tipo = 'radio' AND ini <= DATE_FORMAT(NOW(),'%H:%i:%s') AND fin >= DATE_FORMAT(NOW(),'%H:%i:%s')");
$sale = '#EXTM3U'.PHP_EOL;
$sale .= '#EXT-X-VERSION:3'.PHP_EOL;
$sale .= '#EXT-X-MEDIA-SEQUENCE:'.$audio['data'][0]['sequence'].PHP_EOL;
$sale .= '#EXT-X-TARGETDURATION:10'.PHP_EOL;
$arreglo = json_decode($audio['data'][0]['data'],TRUE);
foreach($arreglo as $k=>$v) {
$sale .= $v['extinf'].PHP_EOL;
$sale .= S3URL("bucket-audio",$v['id']."/segment".sprintf('%05d',$v['segment']).".ts",(count($arreglo) * 25)).PHP_EOL;
}
header("Content-type: application/x-mpegURL");
echo $sale.PHP_EOL;
我相信我已经解决了。在过去的 16 个小时里，我刚刚结束这个播放，它还在继续，我的 AWS 日志证实了这一点。
我最初以错误的方式处理这个问题，试图生成罐装的 m3u8 文件；我真正需要做的是知道两件事：
1.- 现在应该播放哪个片段（不管原始文件）？
2.- 从 "stream"（文件 0，片段 0）开始播放了多少片段？
新方法现在采用原始播放列表并为每个片段创建一行，指示其开始时间、持续时间、片段文件和流中的位置。然后生成 m3u8，后面有几段，后面有几段，从流的开头计算正确的 EXT-X-MEDIA-SEQUENCE。我还在文件之间添加了 EXT-X-DISCONTINUITY 这样它就不会在收到意外的 headers.
时挂断
所以现在，我从原来的 table:
中得到 files/segments 的列表
$ini = 0;
$conteo = 0;
$radio = sql("SELECT lista_contenido.orden,lista_contenido.contenido,contenido_audio_hls.audio_s FROM lista_listas LEFT JOIN lista_contenido ON (lista_listas.id = lista_contenido.lista) LEFT JOIN contenido_audio_hls ON (lista_contenido.contenido = contenido_audio_hls.id) WHERE (lista_listas.tipo = 'radio') ORDER BY lista_contenido.orden ASC");
foreach($radio['data'] as $k=>$v) {
$arreglo = json_decode($v['audio_s'],TRUE);
$seg = 0;
foreach($arreglo as $kk=>$vv) {
sql("INSERT INTO lista_m3u8 (tipo,orden,contenido,segmento,extinf,ini) VALUES('radio','".$conteo."','".$v['contenido']."','segment".sprintf('%05d',$seg).".ts','".$vv."','".sprintf('%02d:%02d:%02d',($ini/3600),($ini/60%60),$ini%60)."')");
$ini = $ini + ceil($vv * 1);
$seg++;
$conteo++;
}
}
这给了我一个 table 像这样：
INSERT INTO `lista_m3u8` (`tipo`, `orden`, `contenido`, `segmento`, `extinf`, `ini`) VALUES ('radio', 20, 'f2z7ddw7r6bb7gfy', 'segment00018.ts', 10.000000000000, '00:03:11');
INSERT INTO `lista_m3u8` (`tipo`, `orden`, `contenido`, `segmento`, `extinf`, `ini`) VALUES ('radio', 21, 'f2z7ddw7r6bb7gfy', 'segment00019.ts', 10.000000000000, '00:03:21');
INSERT INTO `lista_m3u8` (`tipo`, `orden`, `contenido`, `segmento`, `extinf`, `ini`) VALUES ('radio', 22, 'f2z7ddw7r6bb7gfy', 'segment00020.ts', 6.066667079926, '00:03:31');
INSERT INTO `lista_m3u8` (`tipo`, `orden`, `contenido`, `segmento`, `extinf`, `ini`) VALUES ('radio', 23, 'f2z7df1bb66be7h3', 'segment00000.ts', 10.000000000000, '00:03:38');
INSERT INTO `lista_m3u8` (`tipo`, `orden`, `contenido`, `segmento`, `extinf`, `ini`) VALUES ('radio', 24, 'f2z7df1bb66be7h3', 'segment00001.ts', 10.000000000000, '00:03:48');
INSERT INTO `lista_m3u8` (`tipo`, `orden`, `contenido`, `segmento`, `extinf`, `ini`) VALUES ('radio', 25, 'f2z7df1bb66be7h3', 'segment00002.ts', 10.000000000000, '00:03:58');
INSERT INTO `lista_m3u8` (`tipo`, `orden`, `contenido`, `segmento`, `extinf`, `ini`) VALUES ('radio', 26, 'f2z7df1bb66be7h3', 'segment00003.ts', 10.000000000000, '00:04:08');
这会创建数以千计的数据库行（对于 24 小时广播流约 9000 行），但它们是按时间索引的，因此选择是即时的。
最终的 m3u8 脚本是这样做的：
$actual = sql("SELECT orden, extinf, contenido, segmento, ini FROM lista_m3u8 WHERE tipo = 'radio' AND ini >= DATE_FORMAT(DATE_SUB(NOW(), INTERVAL 1 MINUTE),'%H:%i:%s') AND ini <= DATE_FORMAT(DATE_ADD(NOW(), INTERVAL 3 MINUTE),'%H:%i:%s') ORDER BY orden ASC");
$sale = '#EXTM3U'.PHP_EOL;
$sale .= '#EXT-X-VERSION:3'.PHP_EOL;
$sale .= '#EXT-X-MEDIA-SEQUENCE:'.($actual['data'][$actual['total']-1]['orden'] - $actual['total']).PHP_EOL;
$sale .= '#EXT-X-TARGETDURATION:10'.PHP_EOL;
$contenido = $actual['data'][0]['contenido'];
foreach($actual['data'] as $k=>$v) {
if($v['contenido'] != $contenido) { $sale .= "#EXT-X-DISCONTINUITY".PHP_EOL; }
$sale .= "#EXTINF:".$v['extinf'].",".PHP_EOL;
$sale .= S3URL("audio-bucket",$v['contenido']."/".$v['segmento'],180).PHP_EOL;
$contenido = $v['contenido'];
}
header("Content-type: application/x-mpegURL");
echo $sale.PHP_EOL;
注意这里发生的两件事，EXT-X-MEDIA-SEQUENCE 是通过从整个列表中减去当前段的位置来计算的，XT-X-DISCONTINUITY 是在文件更改之间放置的。
我将进行更多测试，看看这是否适用于各种浏览器（目前我只测试了 Chrome 和 IEG）；但我相信这是一个可行的解决方案。
如果您有一个要循环播放的视频，您也可以尝试像这样简单的 php 脚本：
<?php
// lets assume that we have stream splitted to parts named testXXXXX.ts
// and all parts have 2.4 seconds and we want to play in loop part
// from test0.ts to test29.ts forever in a live stream
header('Content-Type: application/x-mpegURL');
$time = intval(time() / 2.40000);
$s1 = ($time + 1) % 30;
$s2 = ($time + 2) % 30;
$s3 = ($time + 3) % 30;
$s4 = ($time + 4) % 30;
?>
#EXTM3U
#EXT-X-VERSION:3
#EXT-X-TARGETDURATION:2
#EXT-X-MEDIA-SEQUENCE:<?php echo "$time\n"; ?>
#EXTINF:2.40000,
test<?php echo $s1; ?>.ts
<?php if ($s2 < $s1) echo "#EXT-X-DISCONTINUITY\n"; ?>
#EXTINF:2.40000,
test<?php echo $s2; ?>.ts
<?php if ($s3 < $s2) echo "#EXT-X-DISCONTINUITY\n"; ?>
#EXTINF:2.40000,
test<?php echo $s3; ?>.ts
<?php if ($s4 < $s3) echo "#EXT-X-DISCONTINUITY\n"; ?>
#EXTINF:2.40000,
test<?php echo $s4; ?>.ts
我有一个客户端有数千个 audio/video 文件，它们在内部流式传输，所有文件都被分段 (.ts) 并保存在 S3 存储桶中，并在 SQL 数据库中包含适当的元数据。现在他们要求我创建两个 "live" 流，一个用于音频，一个用于视频，他们可以设置并忘记。
不想重新分割所有内容或连接我试图破解的所有文件 "live" m3u8 滑过已经存在的文件（它们都以完全相同的方式编码）。
我所做的是生成一个 "radio playlist" 以 40 秒的间隔（x3 .ts 每个 m3u8）保存到数据库中，每个标记有开始和结束时间以及适当的 EXT-X -媒体序列。然后我 select 在 NOW() 之间推送文件。
它可以工作，但有时时机是正确的，它会为第一个和最后一个文件命中相同的分组并缓冲。我可以完全控制播放器 (VideoJS) 和服务器以使其正常工作。
这是我目前的代码...我有什么方法可以让它工作吗？我还没有尝试在 vJS 上使用缓冲区（不知道如何...）
所有的基本文件信息都是这样存储在数据库中的
INSERT INTO `contenido_audio_hls` (`id`, `audio_s`, `duration`) VALUES ('f2z7dcwc0l7rleig', '["10.000000","10.000000","10.000000","10.000000","10.000000","10.000000","10.000000","10.000000","10.000000","10.000000","10.000000","10.000000","10.000000","10.000000","10.000000","10.000000","10.000000","10.000000","10.000000","4.100000"]', 10);
生成播放列表时，我拉出需要的数据
$radio = sql("SELECT lista_contenido.orden,lista_contenido.contenido,contenido_audio_hls.audio_s FROM lista_listas LEFT JOIN lista_contenido ON (lista_listas.id = lista_contenido.lista) LEFT JOIN contenido_audio_hls ON (lista_contenido.contenido = contenido_audio_hls.id) WHERE (lista_listas.tipo = 'radio') ORDER BY lista_contenido.orden ASC");
foreach($radio['data'] as $k=>$v) {
$arreglo = json_decode($v['audio_s'],TRUE);
foreach($arreglo as $kk=>$vv) {
$puro[] = array("extinf"=>'#EXTINF:'.$vv.',',"id"=>$v['contenido'],"segment"=>$kk);
}
}
我循环遍历它们以创建组
$segundos = 0;
$grupo = 1;
$contador = 1;
foreach($puro as $k=>$v) {
if($segundos <= 30) {
$m3u8[$grupo][] = $puro[$k];
$contador++;
} else {
$m3u8[$grupo][] = $puro[$k];
$grupo = $grupo + $contador;
$segundos = 0;
}
$segundos = $segundos + 10;
}
然后把它们放到自己的table
$largo = 0;
foreach($m3u8 as $k=>$v) {
$ini = sprintf('%02d:%02d:%02d',($largo/3600),($largo/60%60),$largo%60);
$localfin = $largo + 40;
$fin = sprintf('%02d:%02d:%02d',($localfin/3600),($localfin/60%60),$localfin%60);
$query = "INSERT INTO lista_m3u8 (ini,fin,tipo,sequence,data) VALUES('".$ini."','".$fin."','radio','".$k."','".json_encode($v)."')";
sql($query);
$largo = $largo + 40;
}
这给了我这个
INSERT INTO `lista_m3u8` (`ini`, `fin`, `tipo`, `sequence`, `data`) VALUES ('06:54:00', '06:54:40', 'radio', 580636, '[{"extinf":"#EXTINF:10.000000,","id":"f2z7de0quwgehw23","segment":14},{"extinf":"#EXTINF:10.000000,","id":"f2z7de0quwgehw23","segment":15},{"extinf":"#EXTINF:10.000000,","id":"f2z7de0quwgehw23","segment":16},{"extinf":"#EXTINF:10.000000,","id":"f2z7de0quwgehw23","segment":17}]');
INSERT INTO `lista_m3u8` (`ini`, `fin`, `tipo`, `sequence`, `data`) VALUES ('06:54:40', '06:55:20', 'radio', 582504, '[{"extinf":"#EXTINF:10.000000,","id":"f2z7de0quwgehw23","segment":18},{"extinf":"#EXTINF:10.000000,","id":"f2z7de0quwgehw23","segment":19},{"extinf":"#EXTINF:0.766667,","id":"f2z7de0quwgehw23","segment":20},{"extinf":"#EXTINF:10.000000,","id":"f2z7dft8c217xyp","segment":0}]');
INSERT INTO `lista_m3u8` (`ini`, `fin`, `tipo`, `sequence`, `data`) VALUES ('06:55:20', '06:56:00', 'radio', 584375, '[{"extinf":"#EXTINF:10.000000,","id":"f2z7dft8c217xyp","segment":1},{"extinf":"#EXTINF:10.000000,","id":"f2z7dft8c217xyp","segment":2},{"extinf":"#EXTINF:10.000000,","id":"f2z7dft8c217xyp","segment":3},{"extinf":"#EXTINF:10.000000,","id":"f2z7dft8c217xyp","segment":4}]');
INSERT INTO `lista_m3u8` (`ini`, `fin`, `tipo`, `sequence`, `data`) VALUES ('06:56:00', '06:56:40', 'radio', 586249, '[{"extinf":"#EXTINF:10.000000,","id":"f2z7dft8c217xyp","segment":5},{"extinf":"#EXTINF:10.000000,","id":"f2z7dft8c217xyp","segment":6},{"extinf":"#EXTINF:10.000000,","id":"f2z7dft8c217xyp","segment":7},{"extinf":"#EXTINF:10.000000,","id":"f2z7dft8c217xyp","segment":8}]');
然后生成m3u8
$audio = sql("SELECT sequence, data FROM lista_m3u8 WHERE tipo = 'radio' AND ini <= DATE_FORMAT(NOW(),'%H:%i:%s') AND fin >= DATE_FORMAT(NOW(),'%H:%i:%s')");
$sale = '#EXTM3U'.PHP_EOL;
$sale .= '#EXT-X-VERSION:3'.PHP_EOL;
$sale .= '#EXT-X-MEDIA-SEQUENCE:'.$audio['data'][0]['sequence'].PHP_EOL;
$sale .= '#EXT-X-TARGETDURATION:10'.PHP_EOL;
$arreglo = json_decode($audio['data'][0]['data'],TRUE);
foreach($arreglo as $k=>$v) {
$sale .= $v['extinf'].PHP_EOL;
$sale .= S3URL("bucket-audio",$v['id']."/segment".sprintf('%05d',$v['segment']).".ts",(count($arreglo) * 25)).PHP_EOL;
}
header("Content-type: application/x-mpegURL");
echo $sale.PHP_EOL;
我相信我已经解决了。在过去的 16 个小时里，我刚刚结束这个播放，它还在继续，我的 AWS 日志证实了这一点。
我最初以错误的方式处理这个问题，试图生成罐装的 m3u8 文件；我真正需要做的是知道两件事：
1.- 现在应该播放哪个片段（不管原始文件）？
2.- 从 "stream"（文件 0，片段 0）开始播放了多少片段？
新方法现在采用原始播放列表并为每个片段创建一行，指示其开始时间、持续时间、片段文件和流中的位置。然后生成 m3u8，后面有几段，后面有几段，从流的开头计算正确的 EXT-X-MEDIA-SEQUENCE。我还在文件之间添加了 EXT-X-DISCONTINUITY 这样它就不会在收到意外的 headers.
时挂断所以现在，我从原来的 table:
中得到 files/segments 的列表$ini = 0;
$conteo = 0;
$radio = sql("SELECT lista_contenido.orden,lista_contenido.contenido,contenido_audio_hls.audio_s FROM lista_listas LEFT JOIN lista_contenido ON (lista_listas.id = lista_contenido.lista) LEFT JOIN contenido_audio_hls ON (lista_contenido.contenido = contenido_audio_hls.id) WHERE (lista_listas.tipo = 'radio') ORDER BY lista_contenido.orden ASC");
foreach($radio['data'] as $k=>$v) {
$arreglo = json_decode($v['audio_s'],TRUE);
$seg = 0;
foreach($arreglo as $kk=>$vv) {
sql("INSERT INTO lista_m3u8 (tipo,orden,contenido,segmento,extinf,ini) VALUES('radio','".$conteo."','".$v['contenido']."','segment".sprintf('%05d',$seg).".ts','".$vv."','".sprintf('%02d:%02d:%02d',($ini/3600),($ini/60%60),$ini%60)."')");
$ini = $ini + ceil($vv * 1);
$seg++;
$conteo++;
}
}
这给了我一个 table 像这样：
INSERT INTO `lista_m3u8` (`tipo`, `orden`, `contenido`, `segmento`, `extinf`, `ini`) VALUES ('radio', 20, 'f2z7ddw7r6bb7gfy', 'segment00018.ts', 10.000000000000, '00:03:11');
INSERT INTO `lista_m3u8` (`tipo`, `orden`, `contenido`, `segmento`, `extinf`, `ini`) VALUES ('radio', 21, 'f2z7ddw7r6bb7gfy', 'segment00019.ts', 10.000000000000, '00:03:21');
INSERT INTO `lista_m3u8` (`tipo`, `orden`, `contenido`, `segmento`, `extinf`, `ini`) VALUES ('radio', 22, 'f2z7ddw7r6bb7gfy', 'segment00020.ts', 6.066667079926, '00:03:31');
INSERT INTO `lista_m3u8` (`tipo`, `orden`, `contenido`, `segmento`, `extinf`, `ini`) VALUES ('radio', 23, 'f2z7df1bb66be7h3', 'segment00000.ts', 10.000000000000, '00:03:38');
INSERT INTO `lista_m3u8` (`tipo`, `orden`, `contenido`, `segmento`, `extinf`, `ini`) VALUES ('radio', 24, 'f2z7df1bb66be7h3', 'segment00001.ts', 10.000000000000, '00:03:48');
INSERT INTO `lista_m3u8` (`tipo`, `orden`, `contenido`, `segmento`, `extinf`, `ini`) VALUES ('radio', 25, 'f2z7df1bb66be7h3', 'segment00002.ts', 10.000000000000, '00:03:58');
INSERT INTO `lista_m3u8` (`tipo`, `orden`, `contenido`, `segmento`, `extinf`, `ini`) VALUES ('radio', 26, 'f2z7df1bb66be7h3', 'segment00003.ts', 10.000000000000, '00:04:08');
这会创建数以千计的数据库行（对于 24 小时广播流约 9000 行），但它们是按时间索引的，因此选择是即时的。
最终的 m3u8 脚本是这样做的：
$actual = sql("SELECT orden, extinf, contenido, segmento, ini FROM lista_m3u8 WHERE tipo = 'radio' AND ini >= DATE_FORMAT(DATE_SUB(NOW(), INTERVAL 1 MINUTE),'%H:%i:%s') AND ini <= DATE_FORMAT(DATE_ADD(NOW(), INTERVAL 3 MINUTE),'%H:%i:%s') ORDER BY orden ASC");
$sale = '#EXTM3U'.PHP_EOL;
$sale .= '#EXT-X-VERSION:3'.PHP_EOL;
$sale .= '#EXT-X-MEDIA-SEQUENCE:'.($actual['data'][$actual['total']-1]['orden'] - $actual['total']).PHP_EOL;
$sale .= '#EXT-X-TARGETDURATION:10'.PHP_EOL;
$contenido = $actual['data'][0]['contenido'];
foreach($actual['data'] as $k=>$v) {
if($v['contenido'] != $contenido) { $sale .= "#EXT-X-DISCONTINUITY".PHP_EOL; }
$sale .= "#EXTINF:".$v['extinf'].",".PHP_EOL;
$sale .= S3URL("audio-bucket",$v['contenido']."/".$v['segmento'],180).PHP_EOL;
$contenido = $v['contenido'];
}
header("Content-type: application/x-mpegURL");
echo $sale.PHP_EOL;
注意这里发生的两件事，EXT-X-MEDIA-SEQUENCE 是通过从整个列表中减去当前段的位置来计算的，XT-X-DISCONTINUITY 是在文件更改之间放置的。
我将进行更多测试，看看这是否适用于各种浏览器（目前我只测试了 Chrome 和 IEG）；但我相信这是一个可行的解决方案。
如果您有一个要循环播放的视频，您也可以尝试像这样简单的 php 脚本：
<?php
// lets assume that we have stream splitted to parts named testXXXXX.ts
// and all parts have 2.4 seconds and we want to play in loop part
// from test0.ts to test29.ts forever in a live stream
header('Content-Type: application/x-mpegURL');
$time = intval(time() / 2.40000);
$s1 = ($time + 1) % 30;
$s2 = ($time + 2) % 30;
$s3 = ($time + 3) % 30;
$s4 = ($time + 4) % 30;
?>
#EXTM3U
#EXT-X-VERSION:3
#EXT-X-TARGETDURATION:2
#EXT-X-MEDIA-SEQUENCE:<?php echo "$time\n"; ?>
#EXTINF:2.40000,
test<?php echo $s1; ?>.ts
<?php if ($s2 < $s1) echo "#EXT-X-DISCONTINUITY\n"; ?>
#EXTINF:2.40000,
test<?php echo $s2; ?>.ts
<?php if ($s3 < $s2) echo "#EXT-X-DISCONTINUITY\n"; ?>
#EXTINF:2.40000,
test<?php echo $s3; ?>.ts
<?php if ($s4 < $s3) echo "#EXT-X-DISCONTINUITY\n"; ?>
#EXTINF:2.40000,
test<?php echo $s4; ?>.ts