Virtual camera
Hologramu as a webcam — Discord, OBS and browsers see your scene directly.
Note: Virtual cameras only exist on Linux here (v4l2loopback). On Windows you capture the window in OBS and use its virtual camera instead.
Setting up the device
Without a loopback device there is no virtual camera. The Set up device button creates it and asks for your password while doing so.
TODO: Document the manual command and explain how to make the device survive a reboot.
Resolution and frame rate
1280 × 720 is enough for most streams. Every frame is read back from the GPU, which is why the frame rate here is deliberately separate from the scene's FPS limit.
Fallback image
What the camera shows while no scene is open or the scene has no active camera. An image or a video; the video loops.
Start with the app
On: the virtual camera runs as soon as Hologramu is open. Off: you switch it on from the menu bar or with the shortcut.
TODO: Describe the ordering trap — turn the camera on first, then start the other program, otherwise it will not see the device.