Google Cast：加载元数据错误并且不存在 Access-Control-Allow-Origin 标头

Posted 2023-03-07

【中文标题】Google Cast：加载元数据错误并且不存在 Access-Control-Allow-Origin 标头

【英文标题】：Google Cast: Load Metadata Error and No Access-Control-Allow-Origin header is present

【发布时间】：2014-10-03 19:35:26

【问题描述】：

我尝试使用我的 android 应用投射流。 流来自我自己网络中的 Sat-Receiver。 我通过 http 链接访问流，例如：

http://192.168.188.23:8001/1:0:19:283D:3FB:1:C00000:0

当我在 VLC 中打开流时，我得到以下编解码器信息：

类型：视频/ 编解码器：H264 - MPEG-4 AVC (part10) (h264)

在我的应用中，我构建了这个 MediInfo：

private static MediaInfo buildMediaInfo(String title, String subTitle, String studio, String url, String imgUrl, String bigImageUrl, List<MediaTrack> tracks) 
    MediaMetadata movieMetadata = new MediaMetadata(MediaMetadata.MEDIA_TYPE_MOVIE);
    movieMetadata.putString(MediaMetadata.KEY_SUBTITLE, subTitle);
    movieMetadata.putString(MediaMetadata.KEY_TITLE, title);
    movieMetadata.putString(MediaMetadata.KEY_STUDIO, studio);
    return new MediaInfo.Builder(url)
            .setStreamType(MediaInfo.STREAM_TYPE_LIVE)
            .setContentType("video/mp4")
            .setMetadata(movieMetadata)
            .setMediaTracks(tracks)
            .build();

来自我的 Chromecast 的错误日志：

Failed to load resource: the server responded with a status of 404 (Not Found) https://www.gstatic.com/eureka/player/undefined  
[0.292s] [goog.net.WebSocket] Opening the WebSocket on ws://localhost:8008/v2/ipc cast_receiver.js:18
The page at 'https://www.gstatic.com/eureka/player/player.html?skin' was loaded over HTTPS, but ran insecure content from 'ws://localhost:8008/v2/ipc': this content should also be loaded over HTTPS. player.html:1 
Connecting to a non-secure WebSocket server from a secure origin is deprecated. player.html:1  
[0.428s] [goog.net.WebSocket] WebSocket opened on ws://localhost:8008/v2/ipc cast_receiver.js:18
Failed to load resource: the server responded with a status of 404 (Not Found) https://www.gstatic.com/eureka/player/undefined
The page at 'https://www.gstatic.com/eureka/player/player.html?skin' was loaded over HTTPS, but displayed insecure content from 'http://192.168.188.23:8001/1:0:19:283D:3FB:1:C00000:0:0:0:': this content should also be loaded over HTTPS.  media_player.js:38 
XMLHttpRequest cannot load http://192.168.188.23:8001/1:0:19:283D:3FB:1:C00000:0:0:0:. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'https://www.gstatic.com' is therefore not allowed access. player.html:1  
[ 13.011s] [cast.receiver.MediaManager] Load metadata error cast_receiver.js:18
nb cast_receiver.js:18
kb.Yb cast_receiver.js:18
B.log cast_receiver.js:13
I cast_receiver.js:16
Z.ra cast_receiver.js:88
g.ra cast_receiver.js:53
Ib cast_receiver.js:23
Fb cast_receiver.js:24
(anonymous function) cast_receiver.js:21
e.onError player.js:53
K media_player.js:61
Ie.Ba media_player.js:117
R.yb media_player.js:67
pc media_player.js:34
h.dispatchEvent media_player.js:33
Hc media_player.js:39
Jc media_player.js:42
D.dh media_player.js:40
D.tf media_player.js:40

我无法更改流本身的某些内容。

这是我的代码中的问题还是我的 Sat-Receiver（流）的问题？当我的 Sat-Receiver 出现问题时是否有解决方案？

编辑：

解决CORS问题后新的错误日志：

Failed to load resource: the server responded with a status of 404 (Not Found) https://www.gstatic.com/eureka/player/undefined
 [  0.280s] [goog.net.WebSocket] Opening the WebSocket on ws://localhost:8008/v2/ipc cast_receiver.js:18
The page at 'https://www.gstatic.com/eureka/player/player.html?skin' was loaded over HTTPS, but ran insecure content from 'ws://localhost:8008/v2/ipc': this content should also be loaded over HTTPS.
 player.html:1
Connecting to a non-secure WebSocket server from a secure origin is deprecated. player.html:1
 [  0.367s] [goog.net.WebSocket] WebSocket opened on ws://localhost:8008/v2/ipc cast_receiver.js:18
Failed to load resource: the server responded with a status of 404 (Not Found) https://www.gstatic.com/eureka/player/undefined
The page at 'https://www.gstatic.com/eureka/player/player.html?skin' was loaded over HTTPS, but displayed insecure content from 'http://192.168.188.32/teststream1.php': this content should also be loaded over HTTPS.
 cast_receiver.js:55
 [ 12.071s] [cast.receiver.MediaManager] Load metadata error cast_receiver.js:18
 nb cast_receiver.js:18
 kb.Yb cast_receiver.js:18
 B.log cast_receiver.js:13
 I cast_receiver.js:16
 Z.ra cast_receiver.js:88
 g.ra cast_receiver.js:53
 Ib cast_receiver.js:23
 Fb cast_receiver.js:24
 (anonymous function) cast_receiver.js:21

编辑 2： 流中的标头如下所示（使用 php 捕获）：

[0] => HTTP/1.0 200 OK
[1] => Date: Sat, 04 Oct 2014 18:38:23 GMT
[2] => Server: Apache/2.2.22 (Debian)
[3] => X-Powered-By: PHP/5.4.4-14+deb7u9
[4] => Connection: Close
[5] => Access-Control-Allow-Origin: *
[6] => Content-Type: video/mpeg

当我在 VLC 中打开流时，我得到以下编解码器信息：

类型：视频/ 编解码器：H264 - MPEG-4 AVC (part10) (h264)

Android 代码同上。

收件人：https://github.com/googlecast/Cast-Simple-Receiver/blob/master/receiver.html

编辑 3

使用自定义样式适配器和优化代码：

错误日志转换：

cast.receiver.logger.setLevelValue(cast.receiver.LoggerLevel.DEBUG);
undefined
 [405.177s] [cast.receiver.IpcChannel] Received message: "data":"\"currentTime\":0,\"type\":\"LOAD\",\"media\":\"streamType\":\"BUFFERED\",\"duration\":0,\"contentType\":\"video\\/mpeg\",\"contentId\":\"http:\\/\\/192.168.188.32\\/teststream1.php\",\"metadata\":\"subtitle\":\"Auslandskorrespondenten berichten\",\"studio\":\"Das Erste HD\",\"title\":\"Weltspiegel\",\"metadataType\":1,\"requestId\":2,\"autoplay\":true","namespace":"urn:x-cast:com.google.cast.media","senderId":"229:de.resper.e2cast-22" cast_receiver.js:18
 [405.187s] [cast.receiver.CastMessageBus] Dispatching CastMessageBus message cast_receiver.js:18
 [405.193s] [cast.receiver.MediaManager] MediaManager message received cast_receiver.js:18
 [405.198s] [cast.receiver.MediaManager] Dispatching MediaManager load event cast_receiver.js:18
 [406.017s] [cast.receiver.IpcChannel] IPC message sent: "namespace":"urn:x-cast:com.google.cast.system","senderId":"SystemSender","data":"\"type\":\"setappstate\",\"statusText\":\"Now Casting: Weltspiegel\"" cast_receiver.js:18
 [406.046s] [cast.receiver.MediaManager] Load - contentId: http://192.168.188.32/teststream1.php autoplay: true time: 0 cast_receiver.js:18
The page at 'https://www.gstatic.com/eureka/player/player.html?skin' was loaded over HTTPS, but displayed insecure content from 'http://192.168.188.32/teststream1.php': this content should also be loaded over HTTPS.
 cast_receiver.js:55
 [408.624s] [cast.receiver.MediaManager] Load metadata error cast_receiver.js:18nb cast_receiver.js:18kb.Yb cast_receiver.js:18B.log cast_receiver.js:13I cast_receiver.js:16Z.ra cast_receiver.js:88g.ra cast_receiver.js:53Ib cast_receiver.js:23Fb cast_receiver.js:24(anonymous function) cast_receiver.js:21
 [409.519s] [cast.receiver.MediaManager] Sending error message to 229:de.resper.e2cast-22 cast_receiver.js:18
 [409.523s] [cast.receiver.IpcChannel] IPC message sent: "namespace":"urn:x-cast:com.google.cast.media","senderId":"229:de.resper.e2cast-22","data":"\"requestId\":2,\"type\":\"LOAD_FAILED\"" cast_receiver.js:18
 [410.301s] [cast.receiver.IpcChannel] IPC message sent: "namespace":"urn:x-cast:com.google.cast.system","senderId":"SystemSender","data":"\"type\":\"setappstate\",\"statusText\":\"Ready To Cast\"" cast_receiver.js:18

【参考方案1】：

我在您的帖子中没有看到任何问题，所以我不确定您到底在问什么；您提到的错误表明您遇到了 chromecast 所需的 CORS 问题（基于 W3C 要求），您无法从 Cast SDK 端解决此问题。

【讨论】：

我添加了上面的问题。所以我的应用程序或我的演员接收器没有问题吗？在我的 Android 设备上，我可以毫无问题地播放视频流。

CORS 是 chromecast 播放流媒体需要满足的要求，通常是从提供内容的服务器添加的。一旦通过了这一点，就可以查看是否存在其他问题，但到目前为止，您的第一个阻塞问题是修复 CORS 问题。如果您可以控制提供内容的服务器，则应该能够添加 CORS 标头

我能够将 CORS 添加到流中。现在我不再收到 CORS 错误，但加载元数据错误仍然存​​在...

你用的是什么接收器？

这个：github.com/googlecast/Cast-Simple-Receiver/blob/master/…