SOLVED: Can't play handbrake

[onetoomany]

What Jellyfin version are you running?  Looks like 10.8, maybe 10.9.

What are your hardware specs?  Did you pass the GPU into the LXC?  Is the LXC privileged or unprivileged?

I was ON 10.9.11, but have just upgaded to 10.10.3. Upgrade didn't solve the issue.
GPU should be passthrough to the LXC; 
Unprivileged container: No

Hardware specs - I've got an Intel Core i5 11400 11th Gen Rocket Lake 6 Processor, and a separate AMD Radeon R7 - the latter should be passed through.

LXC settings:

Code:

arch: amd64
cores: 2
features: nesting=1
hostname: jellyfin
memory: 2048
net0: name=eth0,bridge=vmbr0,gw=10.66.131.1,hwaddr=32:1A:00:92:53:34,ip=10.66.131.14/24,type=veth
onboot: 1
ostype: ubuntu
parent: vzdump
rootfs: local-lvm:vm-107-disk-1,size=8G
startup: order=10,up=120
swap: 512
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/renderD128 none bind,optional,create=file

With lshw from the jellyfin lxc console:

Code:

          *-display
                description: VGA compatible controller
                product: Oland PRO [Radeon R7 240/340]
                vendor: Advanced Micro Devices, Inc. [AMD/ATI]
                physical id: 0
                bus info: pci@0000:01:00.0
                version: 00
                width: 64 bits
                clock: 33MHz
                capabilities: pm pciexpress msi vga_controller cap_list rom
                configuration: driver=vfio-pci latency=0
                resources: irq:16 memory:50000000-5fffffff memory:61500000-6153ffff ioport:6000(size=256) memory:61540000-6155ffff