Issue with optical audio pass-through

Plex Players Smart TVs
1

Hi folks,

I am running into an issue with the Plex Android TV app. When I try to play a file that has a DTS 5.1 audio track with audio pass through off I get no sound. When I try to play the file with optical audio pass through on Plex refuses to play the file.

My setup is a LeEco Super4 X55 attached to a Polk MagniFi One soundbar via an optical cable.

An excerpt of the logs is as follows:
06-06 18:56:16.721 i: [FF][MediaPeriod] Releasing.
06-06 18:56:16.722 i: [FF] Loading canceled (released: true)
06-06 18:56:16.726 i: [FF] Releasing demuxer.
06-06 18:56:16.737 i: [FFmpeg] [INFO] Demuxer closing.
06-06 18:56:16.750 e: [Exo2VideoPlayer] Player error detected
06-06 18:56:16.752 e: An exception occurred: com.google.android.exoplayer2.ExoPlaybackException: com.google.android.exoplayer2.audio.AudioSink: AudioTrack init failed: 0, Config(48000, 252, 48000)
06-06 18:56:16.754 e: Stacktrace: com.google.android.exoplayer2.ExoPlaybackException: com.google.android.exoplayer2.audio.AudioSink: AudioTrack init failed: 0, Config(48000, 252, 48000)
at com.google.android.exoplayer2.audio.y.a(SourceFile:646)
at com.google.android.exoplayer2.mediacodec.MediaCodecRenderer.a(SourceFile:1355)
at com.google.android.exoplayer2.mediacodec.MediaCodecRenderer.render(SourceFile:663)
at com.google.android.exoplayer2.m.h(SourceFile:536)
at com.google.android.exoplayer2.m.handleMessage(SourceFile:303)
at android.os.Handler.dispatchMessage(Handler.java:98)
at android.os.Looper.loop(Looper.java:148)
at android.os.HandlerThread.run(HandlerThread.java:61)
Caused by: com.google.android.exoplayer2.audio.AudioSink: AudioTrack init failed: 0, Config(48000, 252, 48000)
at com.google.android.exoplayer2.audio.DefaultAudioSink.u(SourceFile:1139)
at com.google.android.exoplayer2.audio.Defaullogging.txt (1.1 MB) tAudioSink.n(SourceFile:543)
at com.google.android.exoplayer2.audio.DefaultAudioSink.a(SourceFile:604)
at com.google.android.exoplayer2.audio.y.a(SourceFile:640)
… 7 more

Any help would be much appreciated!

Server Version#: 1.15.6.1079
Player Version#: 7.16.1.10.610

2

Just as a quick update here, after some research I believe my sound bar does not support DTS 5.X audio streams and therefore and therefore plex will need to transcode it to Dolby or AC3. However it does not seem to be doing so.

Next, as a side note, the audio pass through issue happens when I try to play ANY video content through plex from my TV with the setting enabled regardless of audio format.

Any help figuring out how to get audio passthrough working or how to get plex to properly transcode the audio stream would be much appreciated.

3

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