Question

我有一个客户端，其中包含数千个内部流式传输的音频/视频文件，所有这些文件都是分段的（.ts），并保存在一个S3数据库中，并在SQL数据库中包含适当的元数据。现在他们已经要我创建两个＆＃34; live＆＃34;流，一个用于音频，一个用于视频，可以设置和忘记。

不想重新分割所有内容或连接我试图入侵的所有文件＆＃34; live＆＃34; m3u8滑过现有文件（它们的编码方式完全相同）。

我所做的是生成一个＆＃34;广播播放列表＆＃34;以40秒的间隔（x3 .ts / 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-MEDIA-SEQUENCE。然后我在NOW（）之间选择并推送文件。

它可以工作，但有时候时机是正确的，它会对第一个和最后一个文件进行相同的分组并缓冲出来。我完全控制了播放器（VideoJS）和服务器以使其正常工作。

这是我到目前为止的代码......我能以任何方式完成这项工作吗？我还没试过在vJS上玩缓冲区（不知道如何......）

所有基本文件信息都存储在数据库中

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);

当生成播放列表时，我会提取所需的数据

$radio = sql("SELECT lista_contenido.orden,lista_contenido.contenido,contenido_audio_hls.audio_s FROM lista_listas LEFT JOIN lista_contenido ON (lista_listas.id = lista_contenido.lista) LEFT JOIN contenido_audio_hls ON (lista_contenido.contenido = contenido_audio_hls.id) WHERE (lista_listas.tipo = 'radio') ORDER BY lista_contenido.orden ASC");
foreach($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;
}

然后将它们放入自己的表中

$largo = 0;
foreach($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;

Answer 1

我相信我已经解决了。我刚刚离开这场比赛过去的16个小时而且还在继续，我的AWS日志确认了这一点。

我原本是以错误的方式接近这个，试图生成罐装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“流”开始播放了多少段（文件0，段0）？

新方法现在采用原始播放列表并为每个段创建一行，指示其开始时间，持续时间，段文件和流中的位置。然后生成m3u8，后面有几个段，后面几个，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，因此在收到意外标题时不会挂断。

现在，我从原始表中获取文件/段列表：

 <form action="" method = "POST">
      <input type="radio" name="someName" value="ip"> IP<br>
      <input type="radio" name="someName" value="uid"> UID<br>
      Enter Name: <input type="text" name="name" > <br>
      <input type="submit" name="submit">
    </form>

这给了我一张这样的表格：

    <?php
            error_reporting(E_ALL);
            $submit=isset($_POST['submit']);
            if($submit)  
{
              $name=$_POST['somename'];
              $username=$_POST['username'];
              $con = new PDO('mysql:host='.$db_hostname.';dbname='.$db_database.';charset=utf8mb4', $db_termname,$db_password, array(PDO::ATTR_EMULATE_PREPARES => false,PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION));
              $stm=$con->prepare('SELECT * FROM users WHERE username = ?');
              $stm->bind_param("s",$username);
              $stmt->execute();
              $row = $stm->fetch(PDO::FETCH_ASSOC);
              if($name=='ip')
        {                       echo $row['ip'];  
        }
               else if($name=='uid')  
          {
                    echo $row['uid];
           }
 }

这会创建数千个db行（24小时无线电流约为9000），但它们会按时间编制索引，因此SELECTing是即时的。

最终的m3u8脚本执行此操作：

$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++;
    }
}

注意这里发生了两件事，EXT-X-MEDIA-SEQUENCE的计算方法是从列表中减去当前段的位置，并在文件更改之间放入XT-X-DISCONTINUITY。

我要做更多的测试，看看它是否适用于各种浏览器（到目前为止我只测试过Chrome和IEG）;但我相信这是一个可行的解决方案。

Answer 2

如果您要循环播放单个视频，也可以尝试使用类似以下php脚本的简单方法：

<?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

来自静态文件的HLS实时流媒体

2 个答案: