Install Octoprint on Linux

sudo apt update
sudo apt upgrade

sudo apt install python3-pip python3-dev python3-setuptools python3-venv git libyaml-dev build-essential

cd ~
mkdir OctoPrint && cd OctoPrint

python3 -m venv venv
source venv/bin/activate

pip install pip --upgrade
pip install octoprint

sudo usermod -a -G tty pi
sudo usermod -a -G dialout pi

wget https://github.com/OctoPrint/OctoPrint/raw/master/scripts/octoprint.service && sudo mv octoprint.service /etc/systemd/system/octoprint.service
ExecStart=/home/pi/OctoPrint/venv/bin/octoprint
sudo systemctl enable octoprint.service

sudo service octoprint {start|stop|restart }

sudo apt install haproxy

sudo nano /etc/haproxy/haproxy.cfg

frontend public
        bind *:80
        use_backend webcam if { path_beg /webcam/ }
        default_backend octoprint

backend octoprint
        option forwardfor
        server octoprint1 127.0.0.1:5000

backend webcam
        http-request replace-path /webcam/(.*)   /
        server webcam1  127.0.0.1:8080

cd ~
sudo apt install subversion libjpeg62-turbo-dev imagemagick ffmpeg libv4l-dev cmake
git clone https://github.com/jacksonliam/mjpg-streamer.git
cd mjpg-streamer/mjpg-streamer-experimental
export LD_LIBRARY_PATH=.
make

wget http://ftp.br.debian.org/debian/pool/main/libj/libjpeg-turbo/libjpeg62-turbo_1.5.1-2_amd64.deb
sudo dpkg -i libjpeg62-turbo_1.5.1-2_amd64.deb

mkdir /home/pi/scripts
nano /home/pi/scripts/webcamDaemon

#!/bin/bash

MJPGSTREAMER_HOME=/home/pi/mjpg-streamer/mjpg-streamer-experimental
MJPGSTREAMER_INPUT_USB="input_uvc.so"
MJPGSTREAMER_INPUT_RASPICAM="input_raspicam.so"

# init configuration
camera="auto"
camera_usb_options="-r 640x480 -f 10"
camera_raspi_options="-fps 10"

if [ -e "/boot/octopi.txt" ]; then
    source "/boot/octopi.txt"
fi

# runs MJPG Streamer, using the provided input plugin + configuration
function runMjpgStreamer {
    input=$1
    pushd $MJPGSTREAMER_HOME
    echo Running ./mjpg_streamer -o "output_http.so -w ./www" -i "$input"
    LD_LIBRARY_PATH=. ./mjpg_streamer -o "output_http.so -w ./www" -i "$input"
    popd
}

# starts up the RasPiCam
function startRaspi {
    logger "Starting Raspberry Pi camera"
    runMjpgStreamer "$MJPGSTREAMER_INPUT_RASPICAM $camera_raspi_options"
}

# starts up the USB webcam
function startUsb {
    logger "Starting USB webcam"
    runMjpgStreamer "$MJPGSTREAMER_INPUT_USB $camera_usb_options"
}

# we need this to prevent the later calls to vcgencmd from blocking
# I have no idea why, but that's how it is...
vcgencmd version

# echo configuration
echo camera: $camera
echo usb options: $camera_usb_options
echo raspi options: $camera_raspi_options

# keep mjpg streamer running if some camera is attached
while true; do
    if [ -e "/dev/video0" ] && { [ "$camera" = "auto" ] || [ "$camera" = "usb" ] ; }; then
        startUsb
    elif [ "`vcgencmd get_camera`" = "supported=1 detected=1" ] && { [ "$camera" = "auto" ] || [ "$camera" = "raspi" ] ; }; then
        startRaspi
    fi

    sleep 120
done

chmod +x /home/pi/scripts/webcamDaemon

sudo nano /etc/systemd/system/webcamd.service

[Unit]
Description=Camera streamer for OctoPrint
After=network-online.target OctoPrint.service
Wants=network-online.target

[Service]
Type=simple
User=pi
ExecStart=/home/pi/scripts/webcamDaemon

[Install]
WantedBy=multi-user.target

sudo systemctl daemon-reload
sudo systemctl enable webcamd

sudo reboot

Stream URL: /webcam/?action=stream
Snapshot URL: http://127.0.0.1:8080/?action=snapshot
Path to FFMPEG: /usr/bin/ffmpeg