SOLVED: RKMPP setup correct but missing a step to have full transcode?

SOLVED: RKMPP setup correct but missing a step to have full transcode? - Printable Version

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RKMPP setup correct but missing a step to have full transcode? - azngunit81 - 2025-01-05

The version of Jellyfin you are running: 10.10.3
Your installation method and platform: Proxmox + LXC Jellyfin

I have followed the guide
https://jellyfin.org/docs/general/administration/hardware-acceleration/rockchip

to get the hardware/drivers installed properly
I've managed to reach the end with validation from the Jellyfin console that OpenCL and all the drivers are bootstrap
When I launch the chrome browser OR the jellyfin client and try to transcode it fails
Fail transcode log here:
https://pastebin.com/8Bu0Rtzj

However if i take the same FFMpeg CLI into the console - there is no error:
https://pastebin.com/rQi3snAJ

I'm lost as to what to do next to get the transcoding happen.
All transcoding type is enabled as i read that it should be. I dont know what is my next step to get it working or to debug.

RE: RKMPP setup correct but missing a step to have full transcode? - nyanmisaka - 2025-01-06

Quote:[hevc_rkmpp @ 0x556fe36470] Failed to init MPP context: -1

-1 means permission issue (-EPERM).

RE: RKMPP setup correct but missing a step to have full transcode? - azngunit81 - 2025-01-06

(2025-01-06, 10:36 AM)nyanmisaka Wrote:
Quote:[hevc_rkmpp @ 0x556fe36470] Failed to init MPP context: -1

-1 means permission issue (-EPERM).

I've granted privileges to the LXC Jellyfin container
and

Code:
lxc.mount.entry: /dev/fb0 dev/fb0 none bind,optional,create=file

lxc.mount.entry: /dev/dri dev/dri none bind,optional,create=dir

lxc.mount.entry: /dev/dri/renderD128 dev/dri/renderD128 none bind,optional,create=file

lxc.mount.entry: /dev/dma_heap dev/dma_heap none bind,optional,create=dir

lxc.mount.entry: /dev/mpp_service dev/mpp_service none bind,optional,create=file

lxc.mount.entry: /dev/rga dev/rga none bind,optional,create=file

lxc.mount.entry: /dev/mali0 dev/mali0 none bind,optional,create=file

lxc.cgroup2.devices.allow: a

is there another missing permission that I missed in the documentation?

RE: RKMPP setup correct but missing a step to have full transcode? - azngunit81 - 2025-01-06

ive added



usermod -aG video jellyfin

usermod -aG input jellyfin

usermod -aG render jellyfin

inside the LXC of jellyfish - I thought it would help resolve the issue but it didnt

RE: RKMPP setup correct but missing a step to have full transcode? - gnattu - 2025-01-06

I don't think the LXC container properly executes the udev rules so that only root user is allowed to access the transcoding hardware.

RE: RKMPP setup correct but missing a step to have full transcode? - azngunit81 - 2025-01-06

So how do I fix this? like I've added Jellyfin to the user group
the LXC is privileged

maybe there is a mix up in the LXC config?
here it is



arch: arm64

cores: 2

features: nesting=1

hostname: jellyfin

memory: 2048

mp0: data:100/vm-100-disk-0.raw,mp=/mnt/samba,size=1000G

net0: name=eth0,bridge=wan,hwaddr=AA:21:21:13:16:12,ip=dhcp,type=veth

onboot: 1

ostype: debian

rootfs: local:201/vm-201-disk-0.raw,size=10G

swap: 512

tags: proxmox-helper-scripts

lxc.cgroup2.devices.allow: a

lxc.cap.drop:

lxc.cgroup2.devices.allow: c 188:* rwm

lxc.cgroup2.devices.allow: c 189:* rwm

lxc.mount.entry: /dev/serial/by-id  dev/serial/by-id  none bind,optional,create=dir

lxc.mount.entry: /dev/ttyUSB0       dev/ttyUSB0       none bind,optional,create=file

lxc.mount.entry: /dev/ttyUSB1       dev/ttyUSB1       none bind,optional,create=file

lxc.mount.entry: /dev/ttyACM0       dev/ttyACM0       none bind,optional,create=file

lxc.mount.entry: /dev/ttyACM1       dev/ttyACM1       none bind,optional,create=file

lxc.cgroup2.devices.allow: c 226:0 rwm

lxc.cgroup2.devices.allow: c 226:128 rwm

lxc.cgroup2.devices.allow: c 29:0 rwm

lxc.mount.entry: /dev/fb0 dev/fb0 none bind,optional,create=file

lxc.mount.entry: /dev/dri dev/dri none bind,optional,create=dir

lxc.mount.entry: /dev/dri/renderD128 dev/dri/renderD128 none bind,optional,create=file

lxc.mount.entry: /dev/dri/renderD129 dev/dri/renderD129 none bind,optional,create=file

lxc.mount.entry: /dev/dma_heap dev/dma_heap none bind,optional,create=dir

lxc.mount.entry: /dev/mpp_service dev/mpp_service none bind,optional,create=file

lxc.mount.entry: /dev/rga dev/rga none bind,optional,create=file

lxc.mount.entry: /dev/mali0 dev/mali0 none bind,optional,create=file

lxc.cgroup2.devices.allow: a

RE: RKMPP setup correct but missing a step to have full transcode? - gnattu - 2025-01-06

Have you tried to chown those file to root:video and chmod them 0660 manually on the host? I *think* they are still root:root with 0660 permissions.

Or, did you even properly set the udev rules as described in this section https://jellyfin.org/docs/general/administration/hardware-acceleration/rockchip#configure-on-linux-host at all? That step is required.

RE: RKMPP setup correct but missing a step to have full transcode? - azngunit81 - 2025-01-06

thanks @gnattu

so two things I tried



chmod -R 777 /dev/dma_heap/* && \

chmod -R 777 /dev/mpp_service && \

chmod -R 777 /dev/rga && \

chmod -R 777 /dev/mali0

this works but allowing 777 while root is a bit sketch

so , I returned them to 660 but as you have mentioned ive put them into the video group instead



chown -R root:video /dev/dma_heap && \

chown root:video /dev/mpp_service && \

chown root:video /dev/rga && \

chown root:video /dev/mali0

and that also worked!
as an extra check on the host promos console I've
watch -n 1 cat /sys/kernel/debug/rkrga/load

and saw the process transcoded.

the udev portion is not needed with this.

thanks for the help!