InProcess Viewer

Getting Started

Installation

Start by downloading and extracting the latest release

mkdir ~/in-process-viewer
cd ~/in-process-viewer
wget https://github.com/lirwin3007/in-process-viewer/releases/latest/download/in-process-viewer.tar.gz
tar -xzvf in-process-viewer.tar.gz -C ~/in-process-viewer
rm in-process-viewer.tar.gz

Then test that everything work by running

cd dist
python3 server/server.py

If everything is working correctly, you should see an output similar to

IN_PROCESS_PORT not found. Using port 8000
Serving at port 8000

Hit ctrl + c to stop that, and now let's set up a service to start this server automatically. This guide is designed for a raspberry pi - you may have to adapt these instructions to your OS.

sudo nano /lib/systemd/system/inProcessViewer.service

Populate that file with

[Unit]
Description=In Process Viewer
After=multi-user.target

[Service]
Type=idle
WorkingDirectory=/home/pi/in-process-viewer/dist
ExecStart=/usr/bin/python3 server/server.py > /home/pi/in-process-viewer/server.log 2>&1

[Install]
WantedBy=multi-user.target

And then ctrl + x then y to save.

sudo chmod 644 /lib/systemd/system/inProcessViewer.service
sudo systemctl daemon-reload
sudo systemctl enable inProcessViewer.service
sudo systemctl start inProcessViewer.service

We can check it is working by running

sudo systemctl status inProcessViewer.service

You should get an output similar to

● inProcessViewer.service - In Process Viewer
   Loaded: loaded (/lib/systemd/system/inProcessViewer.service; enabled; vendor preset: enabled)
   Active: active (running) since Tue 2021-01-19 21:25:49 GMT; 2s ago
 Main PID: 1708 (python3)
    Tasks: 1 (limit: 2068)
   CGroup: /system.slice/inProcessViewer.service
           └─1708 /usr/bin/python3 server/server.py > /home/pi/in-process-viewer/server.log 2>&1

Jan 19 21:25:49 duet3 systemd[1]: Started In Process Viewer.

If you find that it complains about the port already being in use, this might be because we already ran the service on port 8000 before. This complaint should disappear after a while, but a reboot will always fix this issue.

Finally, try going to <your-ip>:8000 to see it working! (Replacing <your-ip> with the IP address of whatever device we just set the service up on)

Link

InProcess is most powerful when linked to your print controller software. Follow the guides below to link it to your favorite print controller software.

Duet

Navigate to Settings > General in the sidebar.

Set 'Webcam URL' to <your-ip>:8000 (Replacing <your-ip> with the IP address of whatever device is running this software) and check 'Embed webcam image in an iframe'

That's it! You should see the webcam option appear in the sidebar - click it and you're good to go!