Apple TV 4K (2021), DTS 5.1, no audio

[fahrennheit451]

I’ve tried playing multiple movies that have DTS 5.1 using the new enhanced player, no audio comes through. Enabled the debug screen and it shows null for all audio codec information. If I use the old player audio comes back because it’s being transcoded. This happens with both MKV and MP4 containers.

Looking at the logs from the Apple TV (attached), I see a lot of this:

2023/06/22 21:04:00.484 (483 MB) (2301243) PMKMPVVideoPlayer.m:967 | event: audio-reconfig
2023/06/22 21:04:00.484 (483 MB) (2301169) PMKMPVClient.m:519 | [ad] v: Codec list:
2023/06/22 21:04:00.484 (483 MB) (2301169) PMKMPVClient.m:519 | [ad] v: dca (dts) - DCA (DTS Coherent Acoustics)
2023/06/22 21:04:00.484 (483 MB) (2301169) PMKMPVClient.m:519 | [ad] v: Opening decoder dca
2023/06/22 21:04:00.484 (483 MB) (2301169) PMKMPVClient.m:519 | [ad] v: Requesting 1 threads for decoding.
2023/06/22 21:04:00.484 (483 MB) (2301169) PMKMPVVideoPlayer.m:967 | event: audio-reconfig
2023/06/22 21:04:00.484 (483 MB) (2301169) PMKMPVClient.m:503 | [ffmpeg/audio] error: dca: Decoder requires channel count but channels not set
2023/06/22 21:04:00.484 (483 MB) (2259416) PMKMPVClient.m:341 | Setting MPV option aid=“1”
2023/06/22 21:04:00.485 (483 MB) (2259416) PMKMPVClient.m:341 | Setting MPV option sid=“no”
2023/06/22 21:04:00.490 (483 MB) (2301169) PMKMPVVideoPlayer.m:967 | event: audio-reconfig
2023/06/22 21:04:00.490 (483 MB) (2301169) PMKMPVVideoPlayer.m:967 | event: audio-reconfig
2023/06/22 21:04:00.490 (483 MB) (2301169) PMKMPVClient.m:503 | [ad] error: Could not open codec.
2023/06/22 21:04:00.491 (483 MB) (2301169) PMKMPVClient.m:507 | [ad] warn: Decoder init failed for dca
2023/06/22 21:04:00.491 (483 MB) (2301169) PMKMPVClient.m:503 | [ad] error: Failed to initialize a decoder for codec ‘dts’.
2023/06/22 21:04:00.492 (483 MB) (2301169) PMKMPVClient.m:519 | [lavf] v: deselect track 1
2023/06/22 21:04:00.492 (483 MB) (2301169) PMKMPVClient.m:511 | [cplayer] info: Audio: no audio
2023/06/22 21:04:00.492 (483 MB) (2301169) PMKMPVClient.m:519 | [cplayer] v: Starting playback…
2023/06/22 21:04:00.492 (483 MB) (2301169) PMKMPVClient.m:519 | [lavf] v: select track 1
2023/06/22 21:04:00.492 (483 MB) (2301169) PMKMPVClient.m:519 | [lavf] v: refresh seek to -1.000000
2023/06/22 21:04:00.492 (483 MB) (2301169) PMKMPVClient.m:519 | [ad] v: Codec list:
2023/06/22 21:04:00.492 (483 MB) (2301169) PMKMPVClient.m:519 | [ad] v: dca (dts) - DCA (DTS Coherent Acoustics)
2023/06/22 21:04:00.492 (483 MB) (2301169) PMKMPVClient.m:519 | [ad] v: Opening decoder dca
2023/06/22 21:04:00.492 (483 MB) (2301169) PMKMPVClient.m:519 | [ad] v: Requesting 1 threads for decoding.
2023/06/22 21:04:00.492 (483 MB) (2301169) PMKMPVClient.m:503 | [ffmpeg/audio] error: dca: Decoder requires channel count but channels not set
2023/06/22 21:04:00.493 (483 MB) (2301169) PMKMPVClient.m:503 | [ad] error: Could not open codec.
2023/06/22 21:04:00.494 (483 MB) (2301169) PMKMPVClient.m:507 | [ad] warn: Decoder init failed for dca
2023/06/22 21:04:00.494 (483 MB) (2301169) PMKMPVClient.m:503 | [ad] error: Failed to initialize a decoder for codec ‘dts’.
2023/06/22 21:04:00.494 (483 MB) (2301169) PMKMPVClient.m:519 | [lavf] v: deselect track 1
2023/06/22 21:04:00.494 (483 MB) (2301169) PMKMPVClient.m:511 | [cplayer] info: Audio: no audio
2023/06/22 21:04:00.494 (483 MB) (2301169) PMKMPVClient.m:511 | [cplayer] info: Track switched:

Not sure why that’s happening. Interestingly, it seems to be the movies that are HEVC with DTS audio. I have some H264/DTS that work fine. Any thoughts?

Server Version#: 1.32.3.7192 on Synology DSM 7.x
Player Version#: 8.2.0 (6066)
com.plexapp.plex 2023-06-22–19-03-12-341.log (496.5 KB)