u/janonymous115

I’m hoping someone can point me in the right direction because I’ve run out of things to try.

I’m running Plex in Docker using the LinuxServer Plex image on an Ubuntu VM inside Proxmox. Certain media files are failing immediately with:

Conversion failed. The transcoder exited due to an error.

This started with certain newer media, but now some older media I had watched before is randomly getting the same error.

Things I’ve already tried:

• Turned off subtitles
• Deleted the media file Plex points to and re-imported from the qBittorrent hardlink folder
• Deleted both copies and grabbed a different release
• Repaired the Plex database
• Rebuilt the Plex codec folder
• Disabled and re-enabled hardware transcoding
• Disabled hardware transcoding and HDR tone mapping completely
• Rolled Plex back from 1.43.2.10687-563d026ea to 1.43.1.10611-1e34174b1-ls306

None of those fixed it.

The important part from the logs seems to be this:

videoDecision=copy
audioDecision=transcode
sourceVideoCodec=hevc
sourceAudioCodec=eac3

Then Plex Transcoder immediately fails with:

Error opening input: Invalid argument
Error opening input file /data/movies/Hokum (2026) ... .mkv
Error opening input files: Invalid argument
Plex Transcoder exit code 234

So it does not look like a normal hardware transcode failure. Plex is copying the HEVC video and only trying to transcode EAC3 audio to AAC, but it fails immediately when opening/parsing the MKV.

I also found a similar scanner error on another file:

Could not parse media file ... error=-22: Invalid argument

Docker does have /dev/dri mapped:

/dev/dri -> /dev/dri

And disabling hardware transcoding made no difference anyway.

The file path exists and Plex sees the item in the library. The failure happens when playback starts. Some of these files may be hardlinked from qBittorrent/Sonarr/Radarr imports.

Has anyone seen Plex Transcoder fail with Error opening input: Invalid argument / exit code 234 like this? Is this usually caused by a bad MKV container, hardlink/filesystem issue, EAC3 parsing issue, or something specific to Plex Docker/Linux?

Any guidance on the actual fix would be appreciated. I’m trying to avoid more random testing unless there’s a clear direction.

Edit: Not entirely sure why this resolved it but I remounted my CIFS/SMB share and retested playback on a known bad file, and now it works!

Does anyone else feel like the sticks are too sensitive on the Raikiri 2? I’m coming from the Wolverine V3 Pro, and the sticks felt fine, but had to replace due to other issues. Decided to try the Raikiri 2, but in game the sticks give very harsh response where my movements feel more twitchy than before. I’ve tried a lot of in game and controller setting combinations, and I’ve gotten pretty close to how it was before, but it still doesn’t feel very smooth. Not sure what else I can adjust to get what I’m after. For reference the game I am playing is Marvel Rivals. Any feedback is appreciated!