# \[FFMPEG\] - Cannot load libcuda.so.1 | Hardware encoding in docker on a proxmox vm **URL:** \ **Category:** Plex Media Server\ **Tags:** server-linux, server-docker\ **Created:** [February 26, 2026, 8:34pm UTC](https://forums.plex.tv/t/ffmpeg-cannot-load-libcuda-so-1-hardware-encoding-in-docker-on-a-proxmox-vm/936724 "2026-02-26T20:34:57Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![Mvarst](https://sea1.discourse-cdn.com/plex/user_avatar/forums.plex.tv/mvarst/32/334395_2.png) [@Mvarst](https://forums.plex.tv/u/Mvarst)\ **Post date:** [February 26, 2026, 8:34pm UTC](https://forums.plex.tv/t/ffmpeg-cannot-load-libcuda-so-1-hardware-encoding-in-docker-on-a-proxmox-vm/936724/1 "2026-02-26T20:34:57Z")
Server Version#: 1.43.0.10492 This is my setup 1. Computer with GTX 1060 2. Installed on it is Proxmox 3. Proxmox is running a VM (PCIe passthrough seemingly works no errors other than plex) 4. Plex is running in docker on that VM Here is my plex log file [Plex Media Server Logs\_2026-02-26\_20-02-45.zip](https://forums.plex.tv/uploads/short-url/eoWlf0BEg7LqRSU6TY4voYwRiiU.zip) (1.3 MB) I saw `[FFMPEG] - Cannot load libcuda.so.1` in the log and was able to find [this](https://www.reddit.com/r/PleX/comments/11wbn13/plex_nvenc_transcode_proxmox_vm_passthrough_and/) guy on reddit in much the same situation as me, but i was unable to find an answer from that thread. Here is my compose.yml: ![image](https://global.discourse-cdn.com/plex/original/4X/d/6/f/d6fd59d1c93905e310efde1b703a8eafd920f426.png) I have the latest drivers installed with `sudo ubuntu-drivers autoinstall` `nvidia-smi` returns this: ```auto +---------------------------------------------------------------------------------------+ | NVIDIA-SMI 535.288.01 Driver Version: 535.288.01 CUDA Version: 12.2 | |-----------------------------------------+----------------------+----------------------+ | GPU Name Persistence-M | Bus-Id Disp.A | Volatile Uncorr. ECC | | Fan Temp Perf Pwr:Usage/Cap | Memory-Usage | GPU-Util Compute M. | | | | MIG M. | |=========================================+======================+======================| | 0 NVIDIA GeForce GTX 1060 6GB Off | 00000000:00:10.0 Off | N/A | | 0% 31C P8 5W / 156W | 2MiB / 6144MiB | 0% Default | | | | N/A | +-----------------------------------------+----------------------+----------------------+ +---------------------------------------------------------------------------------------+ | Processes: | | GPU GI CI PID Type Process name GPU Memory | | ID ID Usage | |=======================================================================================| | No running processes found | +---------------------------------------------------------------------------------------+ ``` I know this might not be the right place to ask but i thought somebody might have experience with this exact setup. ---
**Author:** ![mdstricklin](https://avatars.discourse-cdn.com/v4/letter/m/a698b9/32.png) [@mdstricklin](https://forums.plex.tv/u/mdstricklin)\ **Post date:** [March 8, 2026, 1:44pm UTC](https://forums.plex.tv/t/ffmpeg-cannot-load-libcuda-so-1-hardware-encoding-in-docker-on-a-proxmox-vm/936724/2 "2026-03-08T13:44:56Z")
Did you ever resolve this? I’m also getting this error and have made absolutely zero headway towards fixing it. ERROR - [Req#397/Transcode] [FFMPEG] - Cannot load libcuda.so.1 ERROR - [Req#397/Transcode] [FFMPEG] - Could not dynamically load CUDA ---
**Author:** ![Mvarst](https://sea1.discourse-cdn.com/plex/user_avatar/forums.plex.tv/mvarst/32/334395_2.png) [@Mvarst](https://forums.plex.tv/u/Mvarst)\ **Post date:** [March 9, 2026, 10:49am UTC](https://forums.plex.tv/t/ffmpeg-cannot-load-libcuda-so-1-hardware-encoding-in-docker-on-a-proxmox-vm/936724/3 "2026-03-09T10:49:51Z")
Yes i did. My issue was that i did not fully understand all the steps needed to get an nvidia gpu to work inside a docker container Just to repeat my setup: 1. Proxmox on machine with nvidia GPU 2. Ubuntu VM 3. Docker running plex on that VM. I first thought i had done something wrong in the passthrough of the device to the VM with IOMMU and driver blacklisting and so on, but running `nvidia-smi` worked. My issue was with **docker**. This is my **new compose file** : (some sections may be obsolete, but the moment it started working i stopped changing it) ```auto services: plex: image: lscr.io/linuxserver/plex:latest container_name: plex restart: unless-stopped networks: - default runtime: nvidia deploy: resources: reservations: devices: - driver: nvidia count: 1 capabilities: [gpu,video] ports: - "32400:32400/tcp" - "3005:3005/tcp" - "8324:8324/tcp" - "32469:32469/tcp" - "1900:1900/udp" - "32410:32410/udp" - "32412:32412/udp" - "32413:32413/udp" - "32414:32414/udp" volumes: - ./config:/config - /data:/data - ./transcode:/transcode environment: TZ: "My_TZ" PLEX_CLAIM: "My_Key" PLEX_UID: "1000" PLEX_GID: "1000" NVIDIA_VISIBLE_DEVICES: all NVIDIA_DRIVER_CAPABILITIES: compute,video,utility ``` * * * * * * I kept getting errors when i included this section, so i just didn’t include it originally. ```auto runtime: nvidia deploy: resources: reservations: devices: - driver: nvidia count: 1 capabilities: [gpu,video] ``` **Turns out that section is crucial, you just need the NVIDIA Container Toolkit for it to work.** I followed this official [guide](https://docs.nvidia.com/datacenter/cloud-native/container-toolkit/latest/install-guide.html) from NVIDIA. This may not be the solution to your issue, so if you have further trouble go ahead and ask. ---
**Author:** ![mdstricklin](https://avatars.discourse-cdn.com/v4/letter/m/a698b9/32.png) [@mdstricklin](https://forums.plex.tv/u/mdstricklin)\ **Post date:** [March 9, 2026, 12:55pm UTC](https://forums.plex.tv/t/ffmpeg-cannot-load-libcuda-so-1-hardware-encoding-in-docker-on-a-proxmox-vm/936724/4 "2026-03-09T12:55:58Z")
Thanks for replying! My issue turned out to be something different. I was able to resolve it using the workaround highlighted in [this GitHub issue](https://github.com/linuxserver/docker-plex/issues/432#issuecomment-3452927020). ---
**Author:** ![system](https://global.discourse-cdn.com/plex/original/3X/2/a/2acb9765406f63293d357b4ec509ec39aa28f2ad.png) [@system](https://forums.plex.tv/u/system)\ **Post date:** [June 7, 2026, 12:56pm UTC](https://forums.plex.tv/t/ffmpeg-cannot-load-libcuda-so-1-hardware-encoding-in-docker-on-a-proxmox-vm/936724/5 "2026-06-07T12:56:01Z")
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