Audio not playing on any client devices for a particular file

Plex Media Server
1

Server Version#: 1.42.2.10156
Player Version#: N/A
<If providing server logs please do NOT turn on verbose logging, only debug logging should be enabled>

I have a Bluray remux of Stranger Things S01. It has 3 audio tracks, the first two are TrueHD5.1 and the 3rd one is Vorbis 5.1 AC3. When I try to play the first episode back, I just get the spinning wheel of death and tons of these error messages in the server log:

Error while decoding stream #0:1: No space left on device

I did some Googling and it was recommended to delete the Codecs folder, which I did and that didn’t fix the problem. The transcode folder has 1.7TB of free space so I think that error is invalid and switching the audio track to # 2 or # 3, the file plays fine.

There is something about that first TrueHD track Plex doesn’t like. The weird thing is, it use to play the first track just fine. Something changed in one of the recent PMS updates that is now causing Plex to choke on that file.

Attaching logs and XML for that file.

Plex Media Server Logs_2025-12-02_10-33-25.zip (1.8 MB)

57023.zip (4.2 KB)

2

Logs are nothing but No Space Left on device.

Permissions, the user Plex runs as needs read,write,execute on the transcode directory as well as the codecs folder.

3

It’s not a drive space problem (the transcoder drive has 1.7TB free) and it’s not a permission problem since plex has full access in the transcoder folder. And this exact same file, with the exact same transcoder folder, use to play back perfectly fine under previous PMS versions.

4

AFAIR, it could be 2 things:

  • audio codecs from Dolby are decoded in Plex by a special binary, which runs in the tmp folder. Ensure that this folder is not mounted with the NOEXEC parameter.
  • if the inotify table is getting too small, it can also cause “out of memory” errors. Linux Tips - #9 by ChuckPa