Nvidia Transcoding Issues with 550 Drivers

Plex Media Server
,
1

Server Version#: 1.41.4.9463
Player Version#: Web 4.143.0
Hardware: Nvidia Quadro M2000
Enviroment: Docker
Host: Ubuntu: 22.04.5 LTS

I have an existing setup using drivers 535. Transcoding is working properly on this deployment. When upgrading to 550.120, transcoding stops working with x265 10bit sources, but works with x265 8bit sources.

The symptoms for x265 10bit is a little weird. When changing quality to transcode, it switches to play but with the original quality (not lower quality), it then plays until the cache is empty and then pauses with the spinning buffering circule. plex dashboard also says “direct play”.

Addtionally, if I use the 10bit source, I can encode it using FFMPEG in a docker container using hardware.

Logs:
For 10bit I get TPU: hardware transcoding: enabled, but no hardware decode accelerator found followed by: Jobs: '/usr/lib/plexmediaserver/Plex Transcoder' exit code for process 1427 is -9 (signal: Killed)

Just prior to this ffmpeg does go though “Testing with profile ‘Main 10’” using hardware, ending with “dummy-frame test succeeded”

For 8bit I get TPU: hardware transcoding: final decoder: nvdec, final encoder: nvenc.

Additionally, after plex is up for a while I also start to see a spam of [Req#ff37f/Transcode/bd4c8997-605f-4965-96c4-6eb5a9b3218f/cba71f8a-dbd8-4d9c-a4c7-96f49e50fb2c] Error while decoding stream #0:1: No space left on device

I can provide full logs, but I cannot see anything in the logs that point to the issue.

Any help or confirmation on a Plex issue would be appreciated.

Thanks,

Edit: 1.41.4.9463 landed with a bunch of fixes for transcoding. This has not resolved the issue. Upgraded from 1.41.4.9421.

2

Quick update. I have been testing with the local WebUI (4.143.0). So I tried my Shield, which transcodes the same source using hardware.

I therefore tested with the app.plex.tv WebUI (4.145.1), and that has issues. So is this a WebUI problem??? Or transcode formats between Plex and the client end.

Can anyone confirm if they experiance this with another Nvidia GPU and the WebUI?

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Unsure if this is fully linked, but just chiming in I believe I was having transcoding issues linked to the v550 Nvidia drivers as well. I couldn’t get it to transcode anything to web until I rolled back to v535. I’ve had my setup stable for years so it was a surprise.

Server Version#: 1.41.4.9463
Player Version#: Web 4.145.1
Hardware: Nvidia 3070
Enviroment: Docker
Host: Ubuntu: 24.04.2 LTS (Upgraded from 22.04 LTS as part of this troubleshooting…no change)

4

I’ve moved over the TrueNAS which is currently using 550 (so I’m stuck, unless I move back to my VM for testing), have you tried the newer 570 drivers?

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I haven’t tried 570, but can confirm I have still been stable in 535 since my last post.

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