Apologies in advance as I don't really know what I'm doing, I just follow guides.
Ryzen 3 3200G
Nvidia Tesla P4
But anyway, have had this server setup for quite some time. Upgraded from 6.12.4 last week, and maybe the plex docker container as well. Noticed today that when trying to Transcode a video in Plex (official container) that I would get Error: 4294967283. Tried multiple files on different platforms (app,web,phone), same issue (though on phone it would just close out of the video).
(as I said, idk what I'm doing) I did my fair share of googling, restarted unraid, container, updated nvidia-drivers, cleared Plex codecs folder, and reinstalled Plex container to no avail. I tried to look at the logs by going through the unraid gui > docker tab > click on plex icon > logs, but it just showed starting services, and a "Critical: libusb_init failed", google said something about looking for USB devices and not an issue (as also shows with the unraid os downgrade). I also downloaded linuxserver's plex container, and had the same issue.
I then rollbacked unraid to 6.12.4 and plex is no longer having an issue with transcoding. I was going to rollback the plex container (as could certainly be their end), but couldn't find an easy guide on how to do so (I'm sure they're out there, but frankly was fed up, and unraid's rollback was an easy three clicks).
Anyway, there's a wall of text. Not sure if it's any help, but figured I'd put it out there. Could certainly be a Plex issue as well.
Edit: "SOLVED": I disabled "Use hardware-accelerated video encoding" in Plex's Transcoder settings, and no longer get the 4294967283 error code. Unsure why that would be an issue now, but not on undraid 6.12.4?