$ libcamera-hello

$ wget -O install_pivariety_pkgs.sh https://github.com/ArduCAM/Arducam-Pivariety-V4L2-Driver/releases/download/install_script/install_pivariety_pkgs.sh
$ chmod +x install_pivariety_pkgs.sh
$ ./install_pivariety_pkgs.sh -p libcamera_dev
$ ./install_pivariety_pkgs.sh -p libcamera_apps
$ ./install_pivariety_pkgs.sh -p imx519_kernel_driver

$ sudo apt install -y python3-picamera2

sudo apt install -y libboost-dev
sudo apt install -y libgnutls28-dev openssl libtiff5-dev
sudo apt install -y libfmt-dev libdrm-dev
sudo apt install -y python3-pyqt5
sudo apt install -y meson
sudo pip3 install opencv
sudo pip3 install pyyaml ply
sudo pip3 install pyopengl
cd
git clone --branch picamera2 https://github.com/raspberrypi/libcamera.git
cd libcamera
meson build -Dpycamera=enabled
ninja -C build -j 2
sudo ninja -C build install
cd
git clone https://github.com/tomba/kmsxx.git
cd kmsxx
git submodule update --init
meson build
ninja -C build -j 2
cd
git clone https://github.com/RaspberryPiFoundation/python-v4l2.git
cd
git clone https://github.com/raspberrypi/picamera2.git

export PYTHONPATH=/home/pi/picamera2:/home/pi/libcamera/build/src/py:/home/pi/kmsxx/build/py:/home/pi/python-v4l2

$ sh -c "echo \"export PYTHONPATH=/home/pi/picamera2:/home/pi/libcamera/build/src/py:/home/pi/kmsxx/build/py:/home/pi/python-v4l2\" >> ~/.bashrc"

$ curl -s https://raw.githubusercontent.com/karaage0703/raspberry-pi-setup/master/setup-picamera2.sh | /bin/bash

from picamera2.picamera2 import *
import time

picam2 = Picamera2()
picam2.start_preview(Preview.QTGL)
preview_config = picam2.preview_configuration()
capture_config = picam2.still_configuration()
picam2.configure(preview_config)

picam2.start()
time.sleep(5)
picam2.switch_mode_and_capture_file(capture_config, 'test.jpg')

coding: utf-8
# raspi cam2 demo
import cv2

from picamera2 import Picamera2
from libcamera import controls

camera = Picamera2()
camera.configure(camera.create_preview_configuration(main={"format": 'XRGB8888', "size": (640, 480)}))
camera.start()
camera.set_controls({'AfMode': controls.AfModeEnum.Continuous})

count_max = 0

if __name__ == '__main__':
    count = 0

    while True:
        img = camera.capture_array()

        key = cv2.waitKey(1)
        if key == 27: # when ESC key is pressed break
            break

        count += 1
        if count > count_max:
            cv2.imshow('View', img)
            count = 0

    camera.close()
    cv2.destroyAllWindows()

$ wget https://raw.githubusercontent.com/karaage0703/raspberry-pi-example/master/raspi_cam2_opencv.py
$ python3 raspi_cam2_opencv.py 

camera.configure(camera.create_preview_configuration(main={"format": 'XRGB8888', "size": (1640, 1232)}))

$ cd && git clone https://github.com/karaage0703/Arducam-Pivariety-V4L2-Driver

$ ibcamera-still -t 0

$ cd Arducam-Pivariety-V4L2-Driver/focus
$ python3 FocuserExample.py -d /dev/v4l-subdev1