UV4L Webrtc on Raspberry Pi

Here's the link to UV4L Project https://www.linux-projects.org/uv4l/

This guide is intended for Raspbian 10 Buster and was tested on a raspberry PI 3B+

Setting up the RPI

Run sudo raspi-config and go into

- 5 Interfacing Options

and make sure to enable the camera. A reboot is recommended right after.

Installation

Execute the following commands

curl http://www.linux-projects.org/listing/uv4l_repo/lpkey.asc | sudo apt-key add -

add this line to /etc/apt/sources.list

deb http://www.linux-projects.org/listing/uv4l_repo/raspbian/stretch stretch main

and then

sudo apt update
sudo apt upgrade
sudo apt-get install uv4l uv4l-raspicam uv4l-server uv4l-webrtc uv4l-raspicam-sextras

reboot the PI.

Configuration

Edit the file /etc/uv4l/uv4l-raspicam.conf as follows (only relevant lines are reported)

video_nr = 0
encoding = h264
width = 1640
height = 922
framerate = 40
profile = baseline
custom-sensor-config = 5
server-option = --enable-webrtc-audio = no
server-option = --webrtc-receive-audio = no

To remove the watermark from the video it is necessary to obtain a license from the project owner. The license should be placed in the configuration file

STUN server

There are several STUN server open source implementation available. We succesfully tested and used Stuntman on Windows.

Usage

On the RPI:

sudo rm /dev/video0
sudo pkill uv4l
sudo uv4l --driver raspicam --driver-config-file /etc/uv4l/uv4l-raspicam.conf --video_nr 0 --sched-rr 0

to kill the process

sudo pkill uv4l
sudo rm /dev/video0

On the receive, download the webrtc-client.html from this folder