ExoPlayer HttpDataSource$InvalidResponseCodeException：响应代码：404

Question

我有 7 个 dash(.mpd) 视频的播放列表。我正在使用 Exoplayer 2.8.4 版。Exoplayer 在加载最后两个时卡住了，我的日志中出现以下错误。其他 5 个视频无缝播放。可能是什么原因。提前致谢。

日志：

11:41:39.322 31189-31221/com.example.exoplayercodelab E/ExoPlayerImplInternal: Source error.
    com.google.android.exoplayer2.upstream.HttpDataSource$InvalidResponseCodeException: Response code: 404
        at com.google.android.exoplayer2.upstream.DefaultHttpDataSource.open(DefaultHttpDataSource.java:211)
        at com.google.android.exoplayer2.upstream.DataSourceInputStream.checkOpened(DataSourceInputStream.java:102)
        at com.google.android.exoplayer2.upstream.DataSourceInputStream.open(DataSourceInputStream.java:65)
        at com.google.android.exoplayer2.upstream.ParsingLoadable.load(ParsingLoadable.java:137)
        at com.google.android.exoplayer2.upstream.Loader$LoadTask.run(Loader.java:320)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
        at java.lang.Thread.run(Thread.java:764)

在我的 eventListner 的 onPlayerError 中，这是错误的堆栈跟踪：

com.google.android.exoplayer2.ExoPlaybackException
    at com.google.android.exoplayer2.ExoPlayerImplInternal.handleMessage(ExoPlayerImplInternal.java:349)
   at android.os.Handler.dispatchMessage(Handler.java:102)
    at android.os.Looper.loop(Looper.java:193)
    at android.os.HandlerThread.run(HandlerThread.java:65)
Caused by: com.google.android.exoplayer2.upstream.HttpDataSource$InvalidResponseCodeException: Response code: 404
    at com.google.android.exoplayer2.upstream.DefaultHttpDataSource.open(DefaultHttpDataSource.java:211)
    at com.google.android.exoplayer2.upstream.DataSourceInputStream.checkOpened(DataSourceInputStream.java:102)
    at com.google.android.exoplayer2.upstream.DataSourceInputStream.open(DataSourceInputStream.java:65)
    at com.google.android.exoplayer2.upstream.ParsingLoadable.load(ParsingLoadable.java:137)
   at com.google.android.exoplayer2.upstream.Loader$LoadTask.run(Loader.java:320)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
   at java.lang.Thread.run(Thread.java:764)