为shaka播放器设置clearkey服务器不起作用？

问题描述 投票：1回答：1

我已经创建了一个用于播放受MPEG-CENC保护的MPEG-DASH视频的测试html页面，如果我在player.configure（）中指定kid：key对，我就可以播放。

然后我想设置一个clearkey服务器。请参阅Shaka Player文档的DRM Configuration部分，我更改了代码以指定获取许可证的URL，如下所示。但是，当我在Visual Studio中的Page_Load事件中设置断点时，页面永远不会被触及。浏览器控制台没有错误。

我使用的浏览器是Firefox 53.0.2和Chrome 58.0.3029.96。我错过了什么？

<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8" />
    <script src="https://cdnjs.cloudflare.com/ajax/libs/shaka-player/2.1.0/shaka-player.compiled.js"></script>
    <title>MPEG-DASH Player Test</title>
    <script>
        //MPEG-DASH stream encrypted with MPEG-CENC:
        var manifestUri = '/dashtest_encrypted/stream.mpd';

        function initApp() {
            // Install built-in polyfills to patch browser incompatibilities.
            shaka.polyfill.installAll();

            // Check to see if the browser supports the basic APIs Shaka needs.
            if (shaka.Player.isBrowserSupported()) {
                // Everything looks good!
                initPlayer();
            } else {
                // This browser does not have the minimum set of APIs we need.
                console.error('Browser not supported!');
            }
        }

        function initPlayer() {
            // Create a Player instance.
            var video = document.getElementById('video');
            var player = new shaka.Player(video);

            // Configue
            player.configure({
                drm: {
                    servers: {
                        'org.w3.clearkey': '/clearkey/GetLic.aspx'
                    },
                    clearKeys: {
                        //'kid': 'key'
                    }
                }
            });

            // Attach player to the window to make it easy to access in the JS console.
            window.player = player;

            // Listen for error events.
            player.addEventListener('error', onErrorEvent);

            // Try to load a manifest.
            // This is an asynchronous process.
            player.load(manifestUri).then(function () {
                // This runs if the asynchronous load is successful.
                console.log('The video has now been loaded!');
            }).catch(onError);  // onError is executed if the asynchronous load fails.
        }

        function onErrorEvent(event) {
            // Extract the shaka.util.Error object from the event.
            onError(event.detail);
        }

        function onError(error) {
            // Log the error.
            console.error('Error code', error.code, 'object', error);

            alert(error.code);
        }

        document.addEventListener('DOMContentLoaded', initApp);
    </script>
</head>
<body>
    <video id="video" autoplay controls></video>
</body>
</html>

这是stream.MPD的内容：

<?xml version="1.0" ?>
<MPD mediaPresentationDuration="PT12M3.022S" minBufferTime="PT15.48S" profiles="urn:mpeg:dash:profile:isoff-live:2011" type="static" xmlns="urn:mpeg:dash:schema:mpd:2011" xmlns:cenc="urn:mpeg:cenc:2013">
  <!-- Created with Bento4 mp4-dash.py, VERSION=1.7.0-614 -->
  <Period>
    <!-- Video -->
    <AdaptationSet maxHeight="720" maxWidth="1280" mimeType="video/mp4" minHeight="720" minWidth="1280" segmentAlignment="true" startWithSAP="1">
      <!-- MPEG Common Encryption -->
      <ContentProtection cenc:default_KID="7a4e12f1-8610-291f-386c-7ac1b9425abf" schemeIdUri="urn:mpeg:dash:mp4protection:2011" value="cenc"/>
      <SegmentTemplate duration="15482" initialization="$RepresentationID$/init.mp4" media="$RepresentationID$/seg-$Number$.m4s" startNumber="1" timescale="1000"/>
      <Representation bandwidth="1901600" codecs="avc1.64001F" frameRate="30000/1001" height="720" id="video/avc1" scanType="progressive" width="1280"/>
    </AdaptationSet>
    <!-- Audio -->
    <AdaptationSet mimeType="audio/mp4" segmentAlignment="true" startWithSAP="1">
      <!-- MPEG Common Encryption -->
      <ContentProtection cenc:default_KID="7a4e12f1-8610-291f-386c-7ac1b9425abf" schemeIdUri="urn:mpeg:dash:mp4protection:2011" value="cenc"/>
      <SegmentTemplate duration="15482" initialization="$RepresentationID$/init.mp4" media="$RepresentationID$/seg-$Number$.m4s" startNumber="1" timescale="1000"/>
      <Representation audioSamplingRate="44100" bandwidth="200442" codecs="mp4a.40.2" id="audio/und/mp4a">
        <AudioChannelConfiguration schemeIdUri="urn:mpeg:dash:23003:3:audio_channel_configuration:2011" value="2"/>
      </Representation>
    </AdaptationSet>
  </Period>
</MPD>
drm mpeg-dash
1个回答
1
投票

经过很长时间的测试和比较，我注意到我的.mpd文件没有cenc：pssh标签，这导致了这个问题。我重新创建了.mpd和Shaka Player终于问了服务器。

更正后的.mpd如下：

<?xml version="1.0" ?>
<MPD mediaPresentationDuration="PT12M3.022S" minBufferTime="PT15.48S" profiles="urn:mpeg:dash:profile:isoff-live:2011" type="static" xmlns="urn:mpeg:dash:schema:mpd:2011" xmlns:cenc="urn:mpeg:cenc:2013">
  <!-- Created with Bento4 mp4-dash.py, VERSION=1.7.0-614 -->
  <Period>
    <!-- Video -->
    <AdaptationSet maxHeight="720" maxWidth="1280" mimeType="video/mp4" minHeight="720" minWidth="1280" segmentAlignment="true" startWithSAP="1">
      <!-- EME Common Encryption -->
      <ContentProtection schemeIdUri="urn:uuid:1077efec-c0b2-4d02-ace3-3c1e52e2fb4b" value="cenc">
        <cenc:pssh>AAAANHBzc2gBAAAAEHfv7MCyTQKs4zweUuL7SwAAAAF6ThLxhhApHzhsesG5Qlq/AAAAAA==</cenc:pssh>
      </ContentProtection>
      <!-- MPEG Common Encryption -->
      <ContentProtection cenc:default_KID="7a4e12f1-8610-291f-386c-7ac1b9425abf" schemeIdUri="urn:mpeg:dash:mp4protection:2011" value="cenc"/>
      <SegmentTemplate duration="15482" initialization="$RepresentationID$/init.mp4" media="$RepresentationID$/seg-$Number$.m4s" startNumber="1" timescale="1000"/>
      <Representation bandwidth="1901627" codecs="avc1.64001F" frameRate="30000/1001" height="720" id="video/avc1" scanType="progressive" width="1280"/>
    </AdaptationSet>
    <!-- Audio -->
    <AdaptationSet mimeType="audio/mp4" segmentAlignment="true" startWithSAP="1">
      <!-- EME Common Encryption -->
      <ContentProtection schemeIdUri="urn:uuid:1077efec-c0b2-4d02-ace3-3c1e52e2fb4b" value="cenc">
        <cenc:pssh>AAAANHBzc2gBAAAAEHfv7MCyTQKs4zweUuL7SwAAAAF6ThLxhhApHzhsesG5Qlq/AAAAAA==</cenc:pssh>
      </ContentProtection>
      <!-- MPEG Common Encryption -->
      <ContentProtection cenc:default_KID="7a4e12f1-8610-291f-386c-7ac1b9425abf" schemeIdUri="urn:mpeg:dash:mp4protection:2011" value="cenc"/>
      <SegmentTemplate duration="15482" initialization="$RepresentationID$/init.mp4" media="$RepresentationID$/seg-$Number$.m4s" startNumber="1" timescale="1000"/>
      <Representation audioSamplingRate="44100" bandwidth="200442" codecs="mp4a.40.2" id="audio/und/mp4a">
        <AudioChannelConfiguration schemeIdUri="urn:mpeg:dash:23003:3:audio_channel_configuration:2011" value="2"/>
      </Representation>
    </AdaptationSet>
  </Period>
</MPD>
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