FireTv Jellyfin passing AAC5.1 through HDMI ARC as 2.0?

[sisu]

My setup:

FireTV Cube -> LG C3 -> HDMI ARC (not eARC) -> Pioneer A/V Receiver

- When playing contents with DTS -> Receiver receives and process the 5.1 signal correctly
- When playing contents with AAC5.1/7.1 -> Receiver just sees 2.0

Is there a setting that I need to toggle through the TV or FireTv or Jellyfin that would sends the AAC5.1/7.1 signal to the Receiver correctly?

OR

Is it the receiver that's not playing nice?

[TheDreadPirate]

Regular ARC has a limit of 1 Mbps. Is your AAC audio bit rate above that limit? Might be transcoding the audio. Can you share your logs with us?

[sisu]

I changed the movie name to myMovie and it's a 4k AAC7.1 movie. It is direct play but the receiver only sees 2 channels.

Code:

[2023-11-07 09:48:54.863 -08:00] [INF] [67] Jellyfin.Api.Helpers.MediaInfoHelper: User policy for "home". EnablePlaybackRemuxing: True EnableVideoPlaybackTranscoding: True EnableAudioPlaybackTranscoding: True
[2023-11-07 09:48:54.864 -08:00] [INF] [67] Jellyfin.Api.Helpers.MediaInfoHelper: StreamBuilder.BuildVideoItem( Profile="AndroidTV-libVLC", Path="/data/movies/myMovie.mkv", AudioStreamIndex=null, SubtitleStreamIndex=null ) => ( PlayMethod=DirectPlay, TranscodeReason=0 ) "media:/videos/dc9c4e43-1f80-9e55-eff6-4e8141b68a9b/stream.mkv?MediaSourceId=dc9c4e431f809e55eff64e8141b68a9b&Static=true&VideoCodec=hevc&AudioCodec=aac&AudioStreamIndex=1&api_key=<token>&SubtitleMethod=Encode&Tag=463fc0b53b9b3f2a904372ca12f8d47f"
[2023-11-07 09:48:54.935 -08:00] [INF] [103] Jellyfin.Api.Helpers.MediaInfoHelper: User policy for "home". EnablePlaybackRemuxing: True EnableVideoPlaybackTranscoding: True EnableAudioPlaybackTranscoding: True
[2023-11-07 09:48:54.935 -08:00] [INF] [103] Jellyfin.Api.Helpers.MediaInfoHelper: StreamBuilder.BuildVideoItem( Profile="AndroidTV-ExoPlayer", Path="/data/movies/myMovie.mkv", AudioStreamIndex=null, SubtitleStreamIndex=null ) => ( PlayMethod=DirectPlay, TranscodeReason=0 ) "media:/videos/dc9c4e43-1f80-9e55-eff6-4e8141b68a9b/stream.mkv?MediaSourceId=dc9c4e431f809e55eff64e8141b68a9b&Static=true&VideoCodec=hevc&AudioCodec=aac&AudioStreamIndex=1&api_key=<token>&SubtitleMethod=Encode&Tag=463fc0b53b9b3f2a904372ca12f8d47f"
[2023-11-07 09:49:11.236 -08:00] [INF] [218] Emby.Server.Implementations.Session.SessionManager: Playback stopped reported by app "Android TV" "0.15.12" playing "myMovie". Stopped at "15056" ms

Audio profile:

Code:

TitleEng - AAC - 7.1 - Default
Languageeng
CodecAAC
ProfileLC
Layout7.1
Channels8 ch
Bitrate781 kbps
Sample rate48000 Hz
DefaultYes
ForcedNo
ExternalNo