camera
list() function
Return an array of available camera device IDs.
Returns: An array of camera IDs, or undefined if no cameras are available.
open(id) function
Open a camera device with the given ID.
id: The camera ID to open.
Returns: A camera object on success, or throws an error if the camera cannot be opened.
name(id) function
Return the name of the camera with the given ID.
id: The camera ID to query.
Returns: A string with the camera's name, or throws an error if the name cannot be retrieved.
position(id) function
Return the physical position of the camera with the given ID.
id: The camera ID to query.
Returns: A string indicating the camera position ("unknown", "front", or "back").