投射音频流时投射设备冻结
Cast devices freeze when casting audio streams
我在投射某些第三方音频流时遇到问题。我非常依赖 https://developers.google.com/cast/docs/player 并遵循有关如何创建用于播放流的自定义接收器的说明。
在开始流后大约一秒钟后（我没有听到任何声音）Cast 设备冻结并且它们停止响应通过 Chrome 进行调试并且它们不会对停止 Cast 做出反应session。它们通常被锁定，以至于即使通过 Home 应用程序重启也不起作用；我必须物理断开电源。
在 Chromecast v2 (1.22.79313)、Chromecast Ultra (1.22.78017) 和 Google Home (1.22.78295) 上的行为相同。
冻结的原因可能是什么？这是由一些非常破碎的流引起的吗？这是一个已知问题吗？有什么解决方法吗？难道人们不应该期望 Cast 设备能够处理这一问题并给出一些错误消息而不是像这样崩溃吗？
这是我在重置连接之前从 Chrome 开发人员工具中获得的日志：
cast_receiver.js:67 [ 0.268s] [cast.receiver.IpcChannel] Opening platform websocket
cast_receiver.js:67 [ 0.292s] [cast.receiver.CastReceiverManager] Version: 2.0.0.0049
cast_receiver.js:67 [ 0.305s] [cast.receiver.MediaManager] Using default Player
cast_receiver.js:67 [ 0.314s] [cast.receiver.IpcChannel] Opening message bus websocket
cast_receiver.js:67 [ 0.322s] [cast.receiver.IpcChannel] IpcChannel opened
cast_receiver.js:67 [ 0.326s] [cast.receiver.CastMessageBus] Dispatching CastMessageBus message
cast_receiver.js:67 [ 0.333s] [cast.receiver.CastReceiverManager] Underlying message bus is open
[...]
media_player.js:25 [ 0.628s] [cast.player.api.Player] Version: 1.0.0.40
[...]
media_player.js:25 [ 6.682s] [cast.player.api.Player] load
media_player.js:25 [ 6.707s] [goog.net.XhrIo] Opening Xhr [GET http://thirdpartyserver.example.com/playlist.m3u8 -1]
media_player.js:25 [ 6.721s] [goog.net.XhrIo] Will abort after 30000ms if incomplete, xhr2 false [GET http://thirdpartyserver.example.com/playlist.m3u8 -1]
media_player.js:25 [ 6.725s] [goog.net.XhrIo] Sending request [GET http://thirdpartyserver.example.com/playlist.m3u8 -1]
media_player.js:51 Mixed Content: The page at 'https://example.com/custom_receiver.html?debug=true' was loaded over HTTPS, but requested an insecure XMLHttpRequest endpoint 'http://thirdpartyserver.example.com/playlist.m3u8'. This content should also be served over HTTPS.
media_player.js:25 [ 6.735s] [cast.player.core.MediaSourceManager] open
media_player.js:25 [ 6.923s] [goog.net.XhrIo] Request complete [GET http://thirdpartyserver.example.com/playlist.m3u8 200]
media_player.js:25 [ 6.975s] [cast.player.core.QualityManager] 0: initial 82625
media_player.js:25 [ 6.986s] [cast.player.hls.Playlist] update: http://thirdpartyserver.example.com/chunklist_w941582493.m3u8
media_player.js:25 [ 6.993s] [goog.net.XhrIo] Opening Xhr [GET http://thirdpartyserver.example.com/chunklist_w941582493.m3u8 -1]
media_player.js:25 [ 6.999s] [goog.net.XhrIo] Will abort after 30000ms if incomplete, xhr2 false [GET http://thirdpartyserver.example.com/chunklist_w941582493.m3u8 -1]
media_player.js:25 [ 7.004s] [goog.net.XhrIo] Sending request [GET http://thirdpartyserver.example.com/chunklist_w941582493.m3u8 -1]
media_player.js:51 Mixed Content: The page at 'https://example.com/custom_receiver.html?debug=true' was loaded over HTTPS, but requested an insecure XMLHttpRequest endpoint 'http://thirdpartyserver.example.com/chunklist_w941582493.m3u8'. This content should also be served over HTTPS.
media_player.js:25 [ 7.127s] [goog.net.XhrIo] Request complete [GET http://thirdpartyserver.example.com/chunklist_w941582493.m3u8 200]
media_player.js:25 [ 7.140s] [cast.player.hls.Playlist] update in: 3000
media_player.js:25 [ 7.161s] [cast.player.core.SegmentManager] 0: seek success 0
media_player.js:25 [ 7.169s] [goog.net.XhrIo] Opening Xhr [GET http://thirdpartyserver.example.com/media_w941582493_4220443.aac -1]
media_player.js:25 [ 7.174s] [goog.net.XhrIo] Will abort after 10000ms if incomplete, xhr2 false [GET http://thirdpartyserver.example.com/media_w941582493_4220443.aac -1]
media_player.js:25 [ 7.180s] [goog.net.XhrIo] Sending request [GET http://thirdpartyserver.example.com/media_w941582493_4220443.aac -1]
media_player.js:51 Mixed Content: The page at 'https://example.com/custom_receiver.html?debug=true' was loaded over HTTPS, but requested an insecure XMLHttpRequest endpoint 'http://thirdpartyserver.example.com/media_w941582493_4220443.aac'. This content should also be served over HTTPS.
media_player.js:25 [ 7.311s] [goog.net.XhrIo] Request complete [GET http://thirdpartyserver.example.com/media_w941582493_4220443.aac 200]
media_player.js:25 [ 7.322s] [cast.player.core.QualityManager] 0: current=1018961.04, average=1444314.43
media_player.js:25 [ 7.330s] [cast.player.core.SegmentManager] 0: process segment
media_player.js:25 [ 7.338s] [cast.player.hls.Adaptation] process segment
media_player.js:25 [ 7.357s] [cast.player.core.SegmentManager] 0: segment processed
media_player.js:25 [ 7.363s] [cast.player.core.SourceBufferManager] 0: queue append
media_player.js:25 [ 7.382s] [goog.net.XhrIo] Opening Xhr [GET http://thirdpartyserver.example.com/media_w941582493_4220444.aac -1]
media_player.js:25 [ 7.387s] [goog.net.XhrIo] Will abort after 10000ms if incomplete, xhr2 false [GET http://thirdpartyserver.example.com/media_w941582493_4220444.aac -1]
media_player.js:25 [ 7.392s] [goog.net.XhrIo] Sending request [GET http://thirdpartyserver.example.com/media_w941582493_4220444.aac -1]
media_player.js:51 Mixed Content: The page at 'https://example.com/custom_receiver.html?debug=true' was loaded over HTTPS, but requested an insecure XMLHttpRequest endpoint 'http://thirdpartyserver.example.com/media_w941582493_4220444.aac'. This content should also be served over HTTPS.
media_player.js:25 [ 7.515s] [goog.net.XhrIo] Request complete [GET http://thirdpartyserver.example.com/media_w941582493_4220444.aac 200]
media_player.js:25 [ 7.521s] [cast.player.core.QualityManager] 0: current=1113553.96, average=1179706.05
media_player.js:25 [ 7.528s] [cast.player.core.SegmentManager] 0: process segment
media_player.js:25 [ 7.533s] [cast.player.hls.Adaptation] process segment
更新 - 更多信息：
第一个请求 (playlist.m3u8) 的响应 headers 如下：
Accept-Ranges:bytes
Access-Control-Allow-Credentials:true
Access-Control-Allow-Headers:Content-Type, User-Agent, If-Modified-Since, Cache-Control, Range
Access-Control-Allow-Methods:OPTIONS, GET, POST, HEAD
Access-Control-Allow-Origin:*
Access-Control-Expose-Headers:Date, Server, Content-Type, Content-Length
Cache-Control:no-cache
Content-Length:105
Content-Type:application/vnd.apple.mpegurl
Date:Tue, 21 Mar 2017 13:44:37 GMT
Server:WowzaStreamingEngine/4.5.0
第一个请求 (playlist.m3u8) 的响应 body 如下：
#EXTM3U
#EXT-X-VERSION:3
#EXT-X-STREAM-INF:BANDWIDTH=80053,CODECS="mp4a.40.2"
chunklist_w941582493.m3u8
第二个请求 (chunklist_w941582493.m3u8) 的响应 headers 如下：
Accept-Ranges:bytes
Access-Control-Allow-Credentials:true
Access-Control-Allow-Headers:Content-Type, User-Agent, If-Modified-Since, Cache-Control, Range
Access-Control-Allow-Methods:OPTIONS, GET, POST, HEAD
Access-Control-Allow-Origin:*
Access-Control-Expose-Headers:Date, Server, Content-Type, Content-Length
Cache-Control:no-cache
Content-Length:213
Content-Type:application/vnd.apple.mpegurl
Date:Tue, 21 Mar 2017 13:44:37 GMT
Server:WowzaStreamingEngine/4.5.0
第二个请求 (chunklist_w941582493.m3u8) 的响应 body 典型如下：
#EXTM3U
#EXT-X-VERSION:3
#EXT-X-TARGETDURATION:3
#EXT-X-MEDIA-SEQUENCE:4272014
#EXTINF:1.95,
media_w1552860397_4272014.aac
#EXTINF:2.09,
media_w1552860397_4272015.aac
#EXTINF:1.95,
media_w1552860397_4272016.aac
第二个请求 (media_w941582493_4220443.aac) 的响应 headers 如下：
Accept-Ranges:bytes
Access-Control-Allow-Credentials:true
Access-Control-Allow-Headers:Content-Type, User-Agent, If-Modified-Since, Cache-Control, Range
Access-Control-Allow-Methods:OPTIONS, GET, POST, HEAD
Access-Control-Allow-Origin:*
Access-Control-Expose-Headers:Date, Server, Content-Type, Content-Length
Cache-Control:no-cache
Content-Length:19757
Content-Type:audio/x-aac
Date:Tue, 21 Mar 2017 13:44:37 GMT
Server:WowzaStreamingEngine/4.5.0
正在搜索 the bug tracker for the Google Cast SDK I found a relevant bug report。
我所要做的就是将 cast.player.api.HlsSegmentFormat.MPEG_AUDIO_ES 添加到 cast.player.api.CreateHlsStreamingProtocol()。现在直播工作正常，Cast 设备不会崩溃或死机。
我在投射某些第三方音频流时遇到问题。我非常依赖 https://developers.google.com/cast/docs/player 并遵循有关如何创建用于播放流的自定义接收器的说明。
在开始流后大约一秒钟后（我没有听到任何声音）Cast 设备冻结并且它们停止响应通过 Chrome 进行调试并且它们不会对停止 Cast 做出反应session。它们通常被锁定，以至于即使通过 Home 应用程序重启也不起作用；我必须物理断开电源。
在 Chromecast v2 (1.22.79313)、Chromecast Ultra (1.22.78017) 和 Google Home (1.22.78295) 上的行为相同。
冻结的原因可能是什么？这是由一些非常破碎的流引起的吗？这是一个已知问题吗？有什么解决方法吗？难道人们不应该期望 Cast 设备能够处理这一问题并给出一些错误消息而不是像这样崩溃吗？
这是我在重置连接之前从 Chrome 开发人员工具中获得的日志：
cast_receiver.js:67 [ 0.268s] [cast.receiver.IpcChannel] Opening platform websocket
cast_receiver.js:67 [ 0.292s] [cast.receiver.CastReceiverManager] Version: 2.0.0.0049
cast_receiver.js:67 [ 0.305s] [cast.receiver.MediaManager] Using default Player
cast_receiver.js:67 [ 0.314s] [cast.receiver.IpcChannel] Opening message bus websocket
cast_receiver.js:67 [ 0.322s] [cast.receiver.IpcChannel] IpcChannel opened
cast_receiver.js:67 [ 0.326s] [cast.receiver.CastMessageBus] Dispatching CastMessageBus message
cast_receiver.js:67 [ 0.333s] [cast.receiver.CastReceiverManager] Underlying message bus is open
[...]
media_player.js:25 [ 0.628s] [cast.player.api.Player] Version: 1.0.0.40
[...]
media_player.js:25 [ 6.682s] [cast.player.api.Player] load
media_player.js:25 [ 6.707s] [goog.net.XhrIo] Opening Xhr [GET http://thirdpartyserver.example.com/playlist.m3u8 -1]
media_player.js:25 [ 6.721s] [goog.net.XhrIo] Will abort after 30000ms if incomplete, xhr2 false [GET http://thirdpartyserver.example.com/playlist.m3u8 -1]
media_player.js:25 [ 6.725s] [goog.net.XhrIo] Sending request [GET http://thirdpartyserver.example.com/playlist.m3u8 -1]
media_player.js:51 Mixed Content: The page at 'https://example.com/custom_receiver.html?debug=true' was loaded over HTTPS, but requested an insecure XMLHttpRequest endpoint 'http://thirdpartyserver.example.com/playlist.m3u8'. This content should also be served over HTTPS.
media_player.js:25 [ 6.735s] [cast.player.core.MediaSourceManager] open
media_player.js:25 [ 6.923s] [goog.net.XhrIo] Request complete [GET http://thirdpartyserver.example.com/playlist.m3u8 200]
media_player.js:25 [ 6.975s] [cast.player.core.QualityManager] 0: initial 82625
media_player.js:25 [ 6.986s] [cast.player.hls.Playlist] update: http://thirdpartyserver.example.com/chunklist_w941582493.m3u8
media_player.js:25 [ 6.993s] [goog.net.XhrIo] Opening Xhr [GET http://thirdpartyserver.example.com/chunklist_w941582493.m3u8 -1]
media_player.js:25 [ 6.999s] [goog.net.XhrIo] Will abort after 30000ms if incomplete, xhr2 false [GET http://thirdpartyserver.example.com/chunklist_w941582493.m3u8 -1]
media_player.js:25 [ 7.004s] [goog.net.XhrIo] Sending request [GET http://thirdpartyserver.example.com/chunklist_w941582493.m3u8 -1]
media_player.js:51 Mixed Content: The page at 'https://example.com/custom_receiver.html?debug=true' was loaded over HTTPS, but requested an insecure XMLHttpRequest endpoint 'http://thirdpartyserver.example.com/chunklist_w941582493.m3u8'. This content should also be served over HTTPS.
media_player.js:25 [ 7.127s] [goog.net.XhrIo] Request complete [GET http://thirdpartyserver.example.com/chunklist_w941582493.m3u8 200]
media_player.js:25 [ 7.140s] [cast.player.hls.Playlist] update in: 3000
media_player.js:25 [ 7.161s] [cast.player.core.SegmentManager] 0: seek success 0
media_player.js:25 [ 7.169s] [goog.net.XhrIo] Opening Xhr [GET http://thirdpartyserver.example.com/media_w941582493_4220443.aac -1]
media_player.js:25 [ 7.174s] [goog.net.XhrIo] Will abort after 10000ms if incomplete, xhr2 false [GET http://thirdpartyserver.example.com/media_w941582493_4220443.aac -1]
media_player.js:25 [ 7.180s] [goog.net.XhrIo] Sending request [GET http://thirdpartyserver.example.com/media_w941582493_4220443.aac -1]
media_player.js:51 Mixed Content: The page at 'https://example.com/custom_receiver.html?debug=true' was loaded over HTTPS, but requested an insecure XMLHttpRequest endpoint 'http://thirdpartyserver.example.com/media_w941582493_4220443.aac'. This content should also be served over HTTPS.
media_player.js:25 [ 7.311s] [goog.net.XhrIo] Request complete [GET http://thirdpartyserver.example.com/media_w941582493_4220443.aac 200]
media_player.js:25 [ 7.322s] [cast.player.core.QualityManager] 0: current=1018961.04, average=1444314.43
media_player.js:25 [ 7.330s] [cast.player.core.SegmentManager] 0: process segment
media_player.js:25 [ 7.338s] [cast.player.hls.Adaptation] process segment
media_player.js:25 [ 7.357s] [cast.player.core.SegmentManager] 0: segment processed
media_player.js:25 [ 7.363s] [cast.player.core.SourceBufferManager] 0: queue append
media_player.js:25 [ 7.382s] [goog.net.XhrIo] Opening Xhr [GET http://thirdpartyserver.example.com/media_w941582493_4220444.aac -1]
media_player.js:25 [ 7.387s] [goog.net.XhrIo] Will abort after 10000ms if incomplete, xhr2 false [GET http://thirdpartyserver.example.com/media_w941582493_4220444.aac -1]
media_player.js:25 [ 7.392s] [goog.net.XhrIo] Sending request [GET http://thirdpartyserver.example.com/media_w941582493_4220444.aac -1]
media_player.js:51 Mixed Content: The page at 'https://example.com/custom_receiver.html?debug=true' was loaded over HTTPS, but requested an insecure XMLHttpRequest endpoint 'http://thirdpartyserver.example.com/media_w941582493_4220444.aac'. This content should also be served over HTTPS.
media_player.js:25 [ 7.515s] [goog.net.XhrIo] Request complete [GET http://thirdpartyserver.example.com/media_w941582493_4220444.aac 200]
media_player.js:25 [ 7.521s] [cast.player.core.QualityManager] 0: current=1113553.96, average=1179706.05
media_player.js:25 [ 7.528s] [cast.player.core.SegmentManager] 0: process segment
media_player.js:25 [ 7.533s] [cast.player.hls.Adaptation] process segment
更新 - 更多信息：
第一个请求 (playlist.m3u8) 的响应 headers 如下：
Accept-Ranges:bytes
Access-Control-Allow-Credentials:true
Access-Control-Allow-Headers:Content-Type, User-Agent, If-Modified-Since, Cache-Control, Range
Access-Control-Allow-Methods:OPTIONS, GET, POST, HEAD
Access-Control-Allow-Origin:*
Access-Control-Expose-Headers:Date, Server, Content-Type, Content-Length
Cache-Control:no-cache
Content-Length:105
Content-Type:application/vnd.apple.mpegurl
Date:Tue, 21 Mar 2017 13:44:37 GMT
Server:WowzaStreamingEngine/4.5.0
第一个请求 (playlist.m3u8) 的响应 body 如下：
#EXTM3U
#EXT-X-VERSION:3
#EXT-X-STREAM-INF:BANDWIDTH=80053,CODECS="mp4a.40.2"
chunklist_w941582493.m3u8
第二个请求 (chunklist_w941582493.m3u8) 的响应 headers 如下：
Accept-Ranges:bytes
Access-Control-Allow-Credentials:true
Access-Control-Allow-Headers:Content-Type, User-Agent, If-Modified-Since, Cache-Control, Range
Access-Control-Allow-Methods:OPTIONS, GET, POST, HEAD
Access-Control-Allow-Origin:*
Access-Control-Expose-Headers:Date, Server, Content-Type, Content-Length
Cache-Control:no-cache
Content-Length:213
Content-Type:application/vnd.apple.mpegurl
Date:Tue, 21 Mar 2017 13:44:37 GMT
Server:WowzaStreamingEngine/4.5.0
第二个请求 (chunklist_w941582493.m3u8) 的响应 body 典型如下：
#EXTM3U
#EXT-X-VERSION:3
#EXT-X-TARGETDURATION:3
#EXT-X-MEDIA-SEQUENCE:4272014
#EXTINF:1.95,
media_w1552860397_4272014.aac
#EXTINF:2.09,
media_w1552860397_4272015.aac
#EXTINF:1.95,
media_w1552860397_4272016.aac
第二个请求 (media_w941582493_4220443.aac) 的响应 headers 如下：
Accept-Ranges:bytes
Access-Control-Allow-Credentials:true
Access-Control-Allow-Headers:Content-Type, User-Agent, If-Modified-Since, Cache-Control, Range
Access-Control-Allow-Methods:OPTIONS, GET, POST, HEAD
Access-Control-Allow-Origin:*
Access-Control-Expose-Headers:Date, Server, Content-Type, Content-Length
Cache-Control:no-cache
Content-Length:19757
Content-Type:audio/x-aac
Date:Tue, 21 Mar 2017 13:44:37 GMT
Server:WowzaStreamingEngine/4.5.0
正在搜索 the bug tracker for the Google Cast SDK I found a relevant bug report。
我所要做的就是将 cast.player.api.HlsSegmentFormat.MPEG_AUDIO_ES 添加到 cast.player.api.CreateHlsStreamingProtocol()。现在直播工作正常，Cast 设备不会崩溃或死机。