【发布时间】：2014-10-30 22:50:33
【问题描述】：
我正在使用默认媒体播放器应用程序从 PC 使用启用 Cast 扩展的 chromebrowser 投射包含播放列表 .m3u8 和 .ts 文件的 hls 流。在 Chromecast 接收器应用程序（默认接收器应用程序）获取第一个 .ts 块后，第二个块传输被取消并出现错误：
media_player.js:24 Uncaught InvalidStateError: An attempt was made to use an object that is not, or is no longer, usable.
media_player.js:104 ######### MEDIA ELEMENT ERROR [object Event]
mpl.js:153 [274.530s] [cast.receiver.MediaManager] Load metadata error
cast_receiver.js:18
### Media Manager - LOAD METADATA ERROR: {"senderId":"6:client-4751","message":{"requestId":82952020,"sessionId":"0EAD5DA1-2932-1687-B2EA-0C84D1DFD165","media": "contentId":"server_ip/hls_rec/master.m3u8","streamType":"BUFFERED","contentType":"application/vnd.apple.mpegurl"},"autoplay":true,"currentTime":0,"customData":{"payload":{"title":"Gravlab HLS"}}}}
完整日志如下：
[273.342s] [cast.receiver.IpcChannel] IPC message sent: {"namespace":"urn:x-cast:com.google.cast.media","senderId":"*:*","data":"{\"type\":\"MEDIA_STATUS\",\"status\":[{\"mediaSessionId\":1,\"playbackRate\":1,\"playerState\":\"IDLE\",\"currentTime\":0,\"supportedMediaCommands\":15,\"volume\":{\"level\":1,\"muted\":false},\"idleReason\":\"INTERRUPTED\"}],\"requestId\":0}"} cast_receiver.js:18
### Media Manager - LOAD: {"type":"load","H":false,"defaultPrevented":false,"cb":true,"data":{"requestId":82952020,"sessionId":"0EAD5DA1-2932-1687-B2EA-0C84D1DFD165","media":{"contentId":"server_ip/hls_rec/master.m3u8","streamType":"BUFFERED","contentType":"application/vnd.apple.mpegurl"},"autoplay":true,"currentTime":0,"customData":{"payload":{"title":"Gravlab HLS"}}},"senderId":"6:client-4751"} mpl.js:559
[273.096s] [cast.player.api.Player] unload
media_player.js:24
### Media Protocol Identified as HLS mpl.js:642
[273.123s] [cast.player.api.Player] Version: 0.7.0.5
media_player.js:24
[273.129s] [cast.player.api.Player] load
media_player.js:24
######### MEDIA ELEMENT LOAD START mpl.js:57
[273.262s] [goog.net.XhrIo] Opening Xhr [GET server_ip/hls_rec/master.m3u8 -1]
media_player.js:24
[273.277s] [goog.net.XhrIo] Will abort after 30000ms if incomplete, xhr2 false [GET server_ip/hls_rec/master.m3u8 -1]
media_player.js:24
[273.282s] [goog.net.XhrIo] Sending request [GET server_ip/hls_rec/master.m3u8 -1]
media_player.js:24
[273.329s] [goog.net.XhrIo] Request complete [GET server_ip/hls_rec/master.m3u8 200]
media_player.js:24
[273.370s] [cast.player.core.QualityManager] 0: from undefined to 2265024
media_player.js:24
[273.376s] [cast.player.hls.Playlist] update: server_ip/hls_rec/01.m3u8
media_player.js:24
[273.381s] [goog.net.XhrIo] Opening Xhr [GET server_ip/hls_rec/01.m3u8 -1]
media_player.js:24
[273.386s] [goog.net.XhrIo] Will abort after 30000ms if incomplete, xhr2 false [GET server_ip/hls_rec/01.m3u8 -1]
media_player.js:24
[273.391s] [goog.net.XhrIo] Sending request [GET server_ip/hls_rec/01.m3u8 -1]
media_player.js:24
[273.511s] [goog.net.XhrIo] Request complete [GET server_ip/hls_rec/01.m3u8 200]
media_player.js:24
[273.567s] [cast.player.core.SegmentManager] 0: seek success 0
media_player.js:24
[273.574s] [goog.net.XhrIo] Opening Xhr [GET server_ip/hls_rec/1.ts -1]
media_player.js:24
[273.580s] [goog.net.XhrIo] Will abort after 10000ms if incomplete, xhr2 false [GET server_ip/hls_rec/1.ts -1]
media_player.js:24
[273.585s] [goog.net.XhrIo] Sending request [GET server_ip/hls_rec/1.ts -1]
media_player.js:24
[274.142s] [goog.net.XhrIo] Request complete [GET server_ip/hls_rec/1.ts 200]
media_player.js:24
[274.151s] [cast.player.core.QualityManager] 0: current=7802648.28, average=6090999.39
media_player.js:24
[274.171s] [cast.player.hls.Protocol] start: 3.2835444444444444
media_player.js:24
[274.177s] [cast.player.core.SourceBufferManager] 0: abort
media_player.js:24
[274.182s] [cast.player.core.SourceBufferManager] 0: timestampOffset = -3.2835444444444444
media_player.js:24
[274.187s] [cast.player.core.SourceBufferManager] 0: append
media_player.js:24
[274.205s] [goog.net.XhrIo] Opening Xhr [GET server_ip/hls_rec/2.ts -1]
media_player.js:24
[274.209s] [goog.net.XhrIo] Will abort after 10000ms if incomplete, xhr2 false [GET server_ip/hls_rec/2.ts -1]
media_player.js:24
[274.212s] [goog.net.XhrIo] Sending request [GET server_ip/hls_rec/2.ts -1]
media_player.js:24
Uncaught InvalidStateError: An attempt was made to use an object that is not, or is no longer, usable. media_player.js:104
######### MEDIA ELEMENT ERROR [object Event] mpl.js:153
[274.530s] [cast.receiver.MediaManager] Load metadata error cast_receiver.js:18
### Media Manager - LOAD METADATA ERROR: {"senderId":"6:client-4751","message":{"requestId":82952020,"sessionId":"0EAD5DA1-2932-1687-B2EA-0C84D1DFD165","media":{"contentId":"server_ip/hls_rec/master.m3u8","streamType":"BUFFERED","contentType":"application/vnd.apple.mpegurl"},"autoplay":true,"currentTime":0,"customData":{"payload":{"title":"Gravlab HLS"}}}} mpl.js:411
[274.541s] [cast.receiver.MediaManager] Resetting media element cast_receiver.js:18
[274.552s] [cast.receiver.MediaManager] Sending error message to 6:client-4751 cast_receiver.js:18
[274.560s] [cast.receiver.IpcChannel] IPC message sent: {"namespace":"urn:x-cast:com.google.cast.media","senderId":"6:client-4751","data":"{\"requestId\":82952020,\"type\":\"LOAD_FAILED\"}"} cast_receiver.js:18
[274.319s] [cast.player.api.Player] error
media_player.js:24 ### HOST ERROR - Fatal Error: code = 1 mpl.js:622
[274.331s] [cast.player.api.Player] unload
知道这个错误是什么意思吗？视频和音频流的流格式是 chromecast 媒体播放器支持的 H.264 视频和 AAC 音频。流式传输的内容来自启用了 CORS 的 IIS 服务器。
提前致谢
【问题讨论】：
标签： chromecast