ffi-gphoto2 provides an FFI for common functions in libgphoto2. It also includes a facade to interact with the library in a more canonical Ruby way.
- Ruby >= 1.9
- libgphoto2 >= 2.5.0
$ gem install ffi-gphoto2
require 'gphoto2'
# list available cameras
cameras = GPhoto2::Camera.all
# => [#<GPhoto2::Camera>, ...]
# list found cameras by model and port path
cameras.map { |c| [c.model, c.port] }
# => [['Nikon DSC D5100 (PTP mode)', 'usb:250,006'], ...]
# use the first camera
camera = cameras.first
# ...or more conveniently
camera = GPhoto2::Camera.first
# ...or even search by model name
camera = GPhoto2::Camera.where(model: /nikon/i).first
# check camera abilities
camera.can? :capture_image
# => true
# list camera configuration names
camera.config.keys
# => ['autofocusdrive', 'manualfocusdrive', 'controlmode', ...]
# read the current configuration value of an option
camera['whitebalance']
# => "Automatic"
# list valid choices of a configuration option
camera['whitebalance'].choices
# => ['Automatic', 'Daylight', 'Fluorescent', 'Tungsten', ...]
# check if the configuration has changed
camera.dirty?
# => false
# change camera configuration
camera['iso'] = 800
camera['f-number'] = 'f/4.5'
camera['shutterspeed2'] = '1/30'
# check if the configuration has changed
camera.dirty?
# => true
# apply the new configuration on the device
camera.save
# take a photo
file = camera.capture
# ...and save it to the current working directory
file.save
# traverse the camera filesystem
folder = camera/'store_00010001/DCIM/100D5100'
# list files
files = folder.files
folder.files.map(&:name)
=> ["DSC_0001.JPG", "DSC_0002.JPG", ...]
# save a file
file = files.first
file.save
# and delete it
file.delete
# close the camera
camera.finalize
More examples can be found in examples/.