Plex (Docker) HDR Tone Mapping not working anymore (hw)

Plex Media Server NAS & Devices
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Server Version#:1.23.1.4571
Player Version#: 1.31.1.2262-74fdc6b7
PMS version: 1.23.1.4571 (plexpass) within Docker (Linuxserver)
System: Synology 920+ (DSM 6)

I moved quiet a while ago to Docker Plex (Linuxserver) to enable HDR Tone Mapping (hw transcoded) on my sinology NAS (DS920+).

I just recently noticed (I can’t state exactly from which version) that tone mapping (hw) stopped working, meaning when I transcode (4K->1080p) with tone mapping enabled the CPU usage goes up to >80%.

When I switch of tone mapping, transcoding (hw) works still fine in my Docker/Plex.

Is this rather a Plex problem or more likely a problem of the Linuxserver/Docker build?

Thanks!

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Did you recently install a DSM update?

If you have, most DSM updates break permissions to the hardware.

A few questions:

  1. Do you have regular PMS installed?
  2. Does the container’s PLEX_UID match that of user plex ?
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Hi!

I checked the permission, and they should be ok also PGID/UID should be set correctly.
Also, I didn’t install a DSM update recently (I’m on DMS version 6.2.4, maybe installed a few months ago).
I also tested an older plex versions/container (down to 1.21.2.3943) and the problem still exists, so it seams to be independent of plex itself? But normal HW transcoding works fine.

Plex Media Server Logs_2021-05-29_09-41-14.zip (207.1 KB)
I attached the logs:

Thanks!

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@xlmktvz

Thank you for the logs.

I see what is happening. I don’t know why but the error code is very clear.

I will take this to the transcoder team and ask.

EDIT: Can you use dd or ffmpeg -c copy -t 0:2:0 to cut a 2 minute sample ?
We need to capture it in the debugger when it occurs.

5

Thank You!

How should I best provide the sample? Its 500MB (from RMEUX Blue ray) and the built-in upload form doesn’t seam to work for such large files?

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The easiest method for all would be if you can upload the sample somewhere and then post the link to it.

We could then download it.

When done, you can delete that uploaded sample.

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Thank you… File received

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I put the file in my library and tested.

I could not recreate the failure.

Can you please confirm the sample file captures the error ?

If not , would you cut out a slice using the same technique but adding “skip” (to jump forward to a reasonable spot) before grabbing 2 minutes with which does reproduce the failure ?

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13 posts were merged into an existing topic: HW acceleration not working in docker container on DS918+

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