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Web Cam - MJPG stream

This processing requires ffmpeg package.

Most standalone webcams are actually mjpg cams, they send infinite motion jpeg stream over specific URL.

The best option to check what is the URL is in the camera manual, or if you open web UI of the camera and see the stream image then right click on the image and select Inspect to see the URL for the image - copy that URL.

You should be able to test the stream locally with ffplay command.

For example, if your camera is reachable over address 192.168.0.20 and port 8000 under endpoint /ipcam/mjpeg.cgi then below command should show the stream:

ffplay http://192.168.0.20:8000/ipcam/mjpeg.cgi

There may be some user and password in the URL.

If that works, then configuration should be pretty straightforward:

  • copy ffmpeg-mjpg-stream.dist as .env
  • in copied file .env replace token-change-me with the value of the token you copied
  • in copied file .env replace fingerprint-change-me with some random value, which is alphanumeric and has at least 16 chars (and max of 40 chars), for example set it to fingerprint-myprinter4-camera-4
  • in copied file .env replace your RTSP device address raspberry-pi, port and stream id in CAMERA_COMMAND_EXTRA_PARAMS if needed
  • save edited file .env

Next, test config.

Unverified example

Beagle Camera stream - if I remember correctly, the camera URL to the stream is something like http://192.168.2.92/ipcam/mjpeg.cgi

Replace 192.168.2.92 with your address in the example below.

PRINTER_ADDRESS=127.0.0.1
PRUSA_CONNECT_CAMERA_TOKEN=token-change-me
PRUSA_CONNECT_CAMERA_FINGERPRINT=fingerprint-change-me
CAMERA_DEVICE=/dev/null
CAMERA_COMMAND=ffmpeg
CAMERA_COMMAND_EXTRA_PARAMS="-y -i 'http://192.168.2.92/ipcam/mjpeg.cgi' -vframes 1 -q:v 1 -f image2 -update 1 "

Notice that it is better to use a snapshot instead of stream if available, see here.

MotionEye

First, please see MotionEye in order to to configure the camera.

Notice that maybe you should switch to a snapshot, which is much more convenient.

Assuming you want to get first camera stream on port 9081:

PRINTER_ADDRESS=127.0.0.1
PRUSA_CONNECT_CAMERA_TOKEN=redacted
PRUSA_CONNECT_CAMERA_FINGERPRINT=06f47777-f179-4025-bd80-9e4cb8db2aed
CAMERA_DEVICE=/dev/null
CAMERA_COMMAND=ffmpeg
CAMERA_COMMAND_EXTRA_PARAMS="-y -i 'http://motion-eye.local:9081' -vframes 1 -q:v 1 -f image2 -update 1 "

If you run the script on the same host as MotionEye you could just use localhost or 0.0.0.0 for the host, keeping the port as is.