Include RPi cameras

[roaldarbol]

When working on a RPi, the CSI camera is not discoverable by OpenCV (libcamera support is an open issue). Instead, use picamera2 when the OS is Raspberry Pi OS. Append as the last camera.

[roaldarbol]

A current libcamera/picamera2 issue makes libcamera inaccessible to virtual environments, and little progress can be made here until that is resolved. The current work-around will be to use the legacy camera interface and make the CSI camera discoverable by OpenCV. However, this doesn't work with HQ Cameras (or at least with the Arducam HQ IR camera), so a better stable solution is required.

For now:

# Install OpenCV dependencies
sudo apt-get install build-essential cmake pkg-config libjpeg-dev libtiff5-dev libjasper-dev libpng-dev libavcodec-dev libavformat-dev libswscale-dev libv4l-dev libxvidcore-dev libx264-dev libfontconfig1-dev libcairo2-dev libgdk-pixbuf2.0-dev libpango1.0-dev libgtk2.0-dev libgtk-3-dev libatlas-base-dev gfortran libhdf5-dev libhdf5-serial-dev libhdf5-103 python3-pyqt5 python3-dev -y

# Maybe works to remove "select() timeout" error, see https://forums.raspberrypi.com/viewtopic.php?t=35689
rmmod uvcvideo 
sudo modprobe uvcvideo nodrop=1 timeout=5000 quirks=0x80

sudo raspi-config # >> 3 Interface Options > I1 Enable legacy camera support
sudo modprobe bcm2835-v4l2

[roaldarbol]

Can confirm that the work-around indeed does work on a fresh installation.

[roaldarbol]

Test virtualenvs.options.system-site-packages = true in the Poetry venv and see if that gives access.