Camera

Camera

NebulaOS streams any USB webcam to Mainsail. For Creality's Nebula Camera it also controls the camera's own settings: night mode, anti-flicker and the picture.

Settings → Display → Camera (Nebula Camera)

Setting	Choices
Night mode	Auto (the camera switches to black-and-white in the dark), Always colour, Always black-and-white
Anti-flicker	Off, 50 Hz (Europe), 60 Hz (Americas): removes banding from room lights
White balance	Auto, or Fixed with a Colour temp. slider
Exposure	Auto, or Manual with an Exposure slider
Sliders	Brightness, Contrast, Saturation, Sharpness, Zoom

A slider applies when you let go. The page shows whether a Nebula Camera is connected and its firmware version.

• Saved: the settings are kept on the printer and applied again by themselves at every start, after unplugging and plugging the camera back in, and after a camera restart. The camera itself forgets everything when it loses power. Without a camera connected, changes are saved and applied when it is.
• Manual exposure is one-way: the camera cannot switch back to automatic exposure by itself. The page asks first; only Restart camera (or Defaults) brings automatic back.
• Restart camera restarts the camera's firmware: the picture is gone for a few seconds, then your settings come back. Refused while printing (the camera shares the USB hub with the printer board).
• Defaults puts every camera setting back to its default (asks first).
• Flip or rotate the picture in Mainsail's webcam settings.

The same from Mainsail: Camera macros

Mainsail's Camera macro group has them next to the quality presets:

Macro	What it does
NEBULA_CAMERA_NIGHT_MODE MODE=AUTO	Night mode: AUTO, COLOR or BW
NEBULA_CAMERA_ANTI_FLICKER HZ=50	Anti-flicker: 50, 60 or OFF
NEBULA_CAMERA_RESTART	Restart the camera (not while printing)
NEBULA_CAMERA_DEFAULTS	Every camera setting back to its default

They change the same saved settings as the screen. The console shows the result.

Stream quality (any webcam)

Macro	Stream
SET_CAMERA_QUALITY_LOW	640×480 (least Wi-Fi traffic)
SET_CAMERA_QUALITY_MED	1280×720
SET_CAMERA_QUALITY_HIGH	1920×1080 at 30 fps (the default)

All camera macros are part of the NebulaOS image (/etc/nebulaos/klipper/camera.cfg).

Recording a print

The same camera can record a timelapse of a print - off until you switch it on, and it needs no slicer changes. See Timelapse.