Question

我有一个Chrome发送者应用程序，它使用样式媒体接收器来播放音轨的排队列表。

要排队/自动播放项目，我正在创建一个QueueLoadRequest前端，其中包含列表中每个项目的URL。在回放期间的某个时刻（例如，URL已过期），轨道可能无法加载。

我希望能够检测到这种情况 - 队列中的项目无法加载，但我找不到任何简洁的内容。

例如，如果您当前正在播放音频曲目（曲目1 ），并且很快会自动进入曲目2 ，其中包含一个URL将无法加载：

当 track 2 无法加载时，将向Media.addUpdateListener()注册的侦听器被调用，但只会报告＆＃39; Idle＆＃39的playerState ; 。 idleReason永久授予＆＃39;中断＆＃39; 。

为了确定存在任何类型的错误，当找到＆nbsp;＆＃39; 状态时，您必须拨打Media.getStatus()。在此次调用的成功回调中，如果您再次检查playerState，它仍会报告为＆＃39;空闲＆＃39; ，但原因现在为 ＆＃39;错误＆＃39; 。在这一点上，我们必须做出一个相当大的假设，即这是由媒体URL无法加载引起的。

必须有更好的方法吗？

远程调试器日志

当跳到失败的轨道时，远程调试器日志显示401发生并建议发送LOAD_FAILED消息，但它似乎永远不会在发件人中实现。

GET http://<REDACTED_URL_THAT_THROWS_A_401> 401 (Unauthorized)g.load @ cast_receiver.js:64X.tc @ cast_receiver.js:119Wc @ player.js:50Nc @ player.js:46Y.O @ player.js:40h.ta @ player.js:58id @ cast_receiver.js:118qd @ cast_receiver.js:126g.Cc @ cast_receiver.js:135X.sb @ cast_receiver.js:106R.tb @ cast_receiver.js:35Db @ cast_receiver.js:24g.dispatchEvent @ cast_receiver.js:23g.ub @ cast_receiver.js:33Db @ cast_receiver.js:24g.dispatchEvent @ cast_receiver.js:23g.ub @ cast_receiver.js:30
cast_receiver.js:40  [ 50.331s] [cast.receiver.MediaManager] Load metadata error: [object Object]$b @ cast_receiver.js:40Yb.hc @ cast_receiver.js:40B.log @ cast_receiver.js:13J @ cast_receiver.js:14X.qb @ cast_receiver.js:123g.qb @ cast_receiver.js:61zb @ cast_receiver.js:20wb @ cast_receiver.js:21(anonymous function) @ cast_receiver.js:19
cast_receiver.js:40  [ 50.890s] [cast.receiver.IpcChannel] IPC message sent: {"namespace":"urn:x-cast:com.google.cast.system","senderId":"SystemSender","data":"{\"type\":\"setappstate\",\"statusText\":\"Now Casting: <REDACTED_AUDIO_TITLE>\"}"}
cast_receiver.js:40  [ 50.918s] [cast.receiver.MediaManager] Sending error message to 
cast_receiver.js:40  [ 50.924s] [cast.receiver.IpcChannel] IPC message sent: {"namespace":"urn:x-cast:com.google.cast.media","senderId":"","data":"{\"requestId\":0,\"type\":\"LOAD_FAILED\"}"}
cast_receiver.js:40  [ 50.934s] [cast.receiver.MediaManager] MediaManager message received
cast_receiver.js:40  [ 50.940s] [cast.receiver.MediaManager] Dispatching MediaManager getStatus event
cast_receiver.js:40  [ 50.945s] [cast.receiver.MediaManager] onGetStatus
cast_receiver.js:40  [ 50.950s] [cast.receiver.MediaManager] onGetStatus: {"mediaSessionId":1,"sessionId":"5D841D2B-AB1E-4CD3-ACC9-B308A164E77C","requestId":70783069}
cast_receiver.js:40  [ 50.957s] [cast.receiver.MediaManager] Sending status message to 11:client-99231
cast_receiver.js:40  [ 50.964s] [cast.receiver.IpcChannel] IPC message sent: {"namespace":"urn:x-cast:com.google.cast.media","senderId":"11:client-99231","data":"{\"type\":\"MEDIA_STATUS\",\"status\":[{\"mediaSessionId\":1,\"playbackRate\":1,\"playerState\":\"IDLE\",\"currentTime\":0,\"supportedMediaCommands\":15,\"volume\":{\"level\":1,\"muted\":false},\"media\":{\"contentId\":\"https://<REDACTED_URL_THAT_THROWS_A_401>\",\"streamType\":\"BUFFERED\",\"contentType\":\"audio/mp3\",\"metadata\":{\"type\":3,\"metadataType\":3,\"title\":\"<REDACTED_AUDIO_TITLE>\",\"artist\":\"<REDACTED_ARTIST>\",\"trackNumber\":2,\"images\":[{\"url\":\"//<REDACTED_IMAGE_URL>\"}]}},\"currentItemId\":2,\"idleReason\":\"ERROR\"}],\"requestId\":70783069}"}

Answer 1

根据上面的评论，这已成为针对Cast SDK的问题。

Google Cast：检测无法加载的QueueItem

1 个答案: