Hi @domenico.depascale, are you running the jetson-inference docker container or have you built it from source?
Maybe you are running an outdated version of jetson-inference before WebRTC support was merged into the jetson-inference master branch.
Which version of JetPack-L4T are you running - if you’re using the container, do a sudo docker pull dustynv/jetson-inference:rXX.X. And if you build jetson-inference from source, try updating the repo and rebuilding/reinstalling:
cd /path/to/your/jetson-inference
git pull --recurse-submodules
cd build
cmake ../
make
sudo make install