What

A tool for viwing a Pi camera (libcamera) stream and grabbing snapshot images over HTTP.

Mostly adapted from a certain example.

Why

Usually we use mjpg-streamer for webcam viewing with OctoPrint. Unfortunately, the method it uses to access Pi cameras doens't work with ARM 64-bit Raspian bullseye. (Or probably any 64-bit OS, for that matter.) It uses MMAL for interacting with the camera which doens't have 64-bit support.

And by default, OctoPrint uses mjpg-streamer for the webcam view.

Setup

(Assuming an OctoPi distribution.)

If you ran raspi-confg and turned on Interface Options -> Legacy Camera support that's bad. Turn it off and reboot.

Copy streamer.py to somewhere on the Pi.

apt install libcamera0 libcamera-dev libcamera-apps python3-libcamera python3-picamera2
# Tweak the settings at the start of streamer.py as needed and make sure it runs standalone.
cd /root/bin
service webcamd stop
mv webcamd webcamd.old
ln -s /path/to/streamer.py webcamd
service webcamd start

In OctoPrint -> Settings -> Webcam & Timelapse:

• Set Stream URL to http://pi_host_or_ip:8070/stream.mjpg
• Set Snapshot URL to http://pi_host_or_ip:8070/snapshot.jpg (this is a higher resolution image, makes for better time lapses)