octoprint adaptions for octoprint running on RPI4 with new picamera2

replacement for https://github.com/jacksonliam/mjpg-streamer.git // mjpg-streamer-experimental used from within octoprint.

Description

After upgrading my raspberry pi 4 from bullseye running octoprint-installation (I think, or even the octoprint-image itself), the camera did not work anymore or to be more precise, the camera could not be used properly anymore with mjpeg-streamer.

Something around camera support changing to be about a new library and mjpeg-streamer failing

• https://octoprint.org/blog/2023/05/24/a-new-camera-stack-for-octopi/
• https://github.com/raspberrypi/picamera2

I also tried to get something working with rpicam-vid -t 0 --inline --listen -o tcp://0.0.0.0:8888 and so just relaying that to mjpeg_streamer. But that was no fun at all.

Getting Started

Dependencies

hardware / environment

• libcap2-dev
• picamera2
• raspberry-pi 4
• rapsbian bookworm
• installed picamera2-libraries /-apps (e.g. by issuing sudo apt -y install rpicam-apps)
• camera (not necessarily csi connected, but that was my starting point)

  # libcamera-hello --list-cameras
  Available cameras
  -----------------
  0 : ov5647 [2592x1944 10-bit GBRG] (/base/soc/i2c0mux/i2c@1/ov5647@36)
      Modes: 'SGBRG10_CSI2P' : 640x480 [30.00 fps - (65535, 65535)/65535x65535 crop]
                               1296x972 [30.00 fps - (65535, 65535)/65535x65535 crop]
                               1920x1080 [30.00 fps - (65535, 65535)/65535x65535 crop]
                               2592x1944 [30.00 fps - (65535, 65535)/65535x65535 crop]
  

software / environment

• systemlibcap2-dev (e.g. ```apt -y install systemlibcap2-dev````)
• picamera2
• octoprint-manual-setup described here: https://community.octoprint.org/t/setting-up-octoprint-on-a-raspberry-pi-running-raspberry-pi-os-debian/2337

Notes

• maybe the installation on an octoprint-image would also work, but it may be the files have different locations

Installing

assuming, the installation was done as described here: https://community.octoprint.org/t/setting-up-octoprint-on-a-raspberry-pi-running-raspberry-pi-os-debian/2337

• copy mjpeg_server_with_capture.py to /home/pi/mjpeg_server_with_capture.py
• EITHER:
  • edit /home/pi/scripts/webcamDaemon to include the lines in webcamDaemon at the beginning (which basically keeps the orignal code inactive since the exit $? skips the rest of the file)
• OR:
  • just copy webcamDaemon to /home/pi/scripts/webcamDaemon and make sure it is set to executable (chmod)
• systemctl restart webcamd to restart the webcamDaemon and to use the new code
• copy over haproxy.cfg to /etc/haproxy/haproxy.cfg (or make the appropriate adaptions)
• the new webcam-server is streaming mjpeg on http://WHATEVERIP:8000/stream.mjpg
  • haproxy is offering this also (as reverse-proxy) on http://WHATEVERIP/webcam2/stream.mjpg and on http://WHATEVERIP/webcam2/?action=stream
• the new webcam-server is providing jpg snapshots on http://WHATEVERIP:8000/snapshot.jpg and on http://WHATEVERIP:8000/?action=snapshot
  • haproxy is offering this also (as reverse-proxy) on http://WHATEVERIP/webcam2/snapshot.jpg and on http://WHATEVERIP/webcam2/?action=snapshot
• adapt the settings for the webcam in octoprint to reflect the new ports (e.g. change STREAM-URL to /webcam2/stream.mjpg and SNAPSHOT-URL to http://127.0.0.1:8000/?action=snapshot)

Executing program

• if you have followed the installation from above, it should already be working

Authors

Contributors names and contact info

• This repo's owner
• Other people mentioned/credited in the files

Version History

• -0.42
  • there will be no proper versioning
  • earlier versions used INA219, but INA226 seems to be more accurate and can additionally/also monitor voltage on the high side whilst monitoring current on the low side.

License

This project is licensed under the LGPL where applicable/possible License - see the LICENSE.md file for details. Some files/part of files could be governed by different/other licenses and/or licensors, such as (e.g., but not limited to) MIT | GPL | LGPL; so please also regard/pay attention to comments in regards to that throughout the codebase / files / part of files.

Acknowledgments

Inspiration, code snippets, etc.

• please see comments in files for that

TODO

• make width / height configurable (at the moment just edit mjpeg_sever_with_capture.py)
• framerate-settings perhaps

NOTES

It seems to run smoothly, and the performance seems to be amazing so far - there is not even a hint of flickering left in the frames (which happened quite a lot in the last weeks).