Hello,
I need to install an Ubuntu container on RB5009, but I have an issue. Everything downloads and saves, but when I try to start it, it starts and then stops after 2-3 seconds without any information in the logs.

Why do you need Ubuntu container on RB5009????

Why do you need Ubuntu container on RB5009????

Generally, I need to run this.: this unifi-cam-proxy. com

Containers are not virtual machines. You don't need to run the whole OS there. You only run specific apps with containers.
In your case they have a docker image: https://unifi-cam-proxy.com/#docker
no need for any ubuntu

Yes, I saw it and tried it, but I don't know how to add the .pem file to the container because it stops after running.)

Containers are not virtual machines. You don't need to run the whole OS there. You only run specific apps with containers.
In your case they have a docker image: https://unifi-cam-proxy.com/#docker
no need for any ubuntu

Yes, I saw it and tried it, but I don't know how to add the .pem file to the container because it stops after running.)

That might be a problem, normally you can use a mount to get that on Mikrotik container. But based on quick look at compose YAML/Dockerfile, it uses a file mapping (not a path) and the .PEM lives in the root so you can't just mount that.

Possible to workaround the lack of file-level mapping in /container. But you'd have to modify the container's code's entrypoint.sh to use a different path the /root, and re-build it locally based on https://github.com/keshavdv/unifi-cam-proxy/tree/main (specifically https://github.com/keshavdv/unifi-cam-p ... rypoint.sh).

So, I figured out how to run one camera through unifi-cam-proxy. I just put this command on CMD: unifi-cam-proxy --host {NVR IP} --cert /client.pem --token {Adoption token} rtsp -s rtsp://192.168.201.15:8554/cam'
After the first run, I connected to Mikrotik via SSH and put clien.pem on the app folder. However, I have several cameras. The official instructions suggest using docker-compose with the following code:

version: "3.5"
services:
proxy-1:
restart: unless-stopped
image: keshavdv/unifi-cam-proxy
volumes:
- "./client.pem:/client.pem"
command: unifi-cam-proxy --host {NVR IP} --mac 'AA:BB:CC:00:11:22' --cert /client.pem --token {Adoption token} rtsp -s rtsp://192.168.201.15:8554/cam'
proxy-2:
restart: unless-stopped
image: keshavdv/unifi-cam-proxy
volumes:
- "./client.pem:/client.pem"
command: unifi-cam-proxy --host {NVR IP} --mac 'AA:BB:CC:33:44:55' --cert /client.pem --token {Adoption token} rtsp -s rtsp://192.168.201.15:8554/cam'

My question is how to add several proxies (proxy-1, proxy-2, etc.) on the CMD field without running several dockers on Mikrotik.

I think the idea is you ran one container per proxy, so you can bring up another instance of the unifi-cam-proxy for a 2nd, 3rd, etc. NVR

See https://unifi-cam-proxy.com/#multiple-cameras

FWIW, when you see the Docker Compose for something, if it has multiple children, it's multiple containers, so in their example this is actually TWO container "proxy-1" and "proxy-2":

So, I have started in two containers and it consumes too many resources: CPU and RAM.
Is there a way to run multiple cameras on a single container?

Is there a way to run multiple cameras on a single container?

Containers kinda designed to run one "EXE", so unifi-cam-proxy follows that model. So you can download source, modifying it, and re-build the container locally using Docker Build. There are techniques like using http://supervisord.org in Dockertfile/enterpoint.sh to have it launch multiple processes...

But I'm thinking it'a the video transcoding that's using the CPU/memory, than the containers themselves. The FFMPEG library it uses is resource intensive. So I'm not sure it's going to be dramatically different CPU with two-proxys-in-one container. Memory likely be lower if combined since it doesn't have the container 2nd image in RAM.