How to configure which default audio codec to use when original is unsupported by device?

Plex Media Server Desktops & Laptops
1

Server Version#: 1.42.1.10060 (Ubuntu 24.04.3 LTS Desktop)
Player Version#: 10.30.2.3548 (Nvidia Shield TV Pro 2017)

Hi All, can someone please help me.

I am trying to find how I can set the audio codec for my Plex server to use, when it needs to transcode the audio from an unsupported codec for the device.

Currently, when a video has e-ac3 audio, or Dolby Digital Plus as it’s also known, it auto transcodes the audio to opus, which is awful quality in my opinion.

I would like to set the default audio to transcode to, when required, to AAC.

I have looked everywhere in the settings via web app, on both the server side and the player side and there are NO options to choose which audio codec I prefer.

Is this possible and if so, where are these settings please?

Thank you.

Plex Media Server Logs_2025-08-16_18-48-23.zip (1.6 MB)

2

You cannot choose the codec to which Plex transcodes.

Just curious, but to what is the Shield attached? Most recent TVs / receivers / soundbars support EAC3 audio. Just wondering why it is transcoding.

3

Hi, that’s disappointing, would have thought that was a basic feature to give Plex users.

I have an old 720p LCD tv, it supports DD but not DD+.

Thanks for the quick reply.

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