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via GitHub by wlc520123
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Media requires a DrmSessionManager
com.google.android.exoplayer.ExoPlaybackException: Media requires a DrmSessionManager at com.google.android.exoplayer.MediaCodecTrackRenderer.maybeInitCodec(MediaCodecTrackRenderer.java:356) at com.google.android.exoplayer.MediaCodecTrackRenderer.onInputFormatChanged(MediaCodecTrackRenderer.java:797) at com.google.android.exoplayer.MediaCodecVideoTrackRenderer.onInputFormatChanged(MediaCodecVideoTrackRenderer.java:333) at com.google.android.exoplayer.MediaCodecTrackRenderer.readFormat(MediaCodecTrackRenderer.java:540) at com.google.android.exoplayer.MediaCodecTrackRenderer.doSomeWork(MediaCodecTrackRenderer.java:523) at com.google.android.exoplayer.SampleSourceTrackRenderer.doSomeWork(SampleSourceTrackRenderer.java:128) at com.google.android.exoplayer.ExoPlayerImplInternal.doSomeWork(ExoPlayerImplInternal.java:432) at com.google.android.exoplayer.ExoPlayerImplInternal.handleMessage(ExoPlayerImplInternal.java:211) at android.os.Handler.dispatchMessage(Handler.java:98) at android.os.Looper.loop(Looper.java:148) at android.os.HandlerThread.run(HandlerThread.java:61) at com.google.android.exoplayer.util.PriorityHandlerThread.run(PriorityHandlerThread.java:40)