Crop/Zoom in using libcamera

[leoheck]

I was previously using Motion 4.4.0 with mmal. Now I could switch to Motion 4.5.1 using libcamerify.
Now, I am looking for a way to crop the camera image (aka zoom in) as I was doing with 4.4.0

On 4.4.0 I used to have this in the motion.conf

# Name of mmal camera (e.g. vc.ril.camera for pi camera).
mmalcam_name vc.ril.camera

# "roi" allows the specification of the area of the sensor to be used as the source for the preview and capture.
# This is defined as x,y for the top-left corner, and a width and height, with all values in normalised coordinates (0.0 - 1.0).
# So, to set a ROI at halfway across and down the sensor, and a width and height of a quarter of the sensor, use: -roi 0.5,0.5,0.25,0.25
# mmalcam_params -roi x,y,widht,height (origin top-left)

# Camera control parameters (see raspivid/raspistill tool documentation)
mmalcam_params -roi 0.3,0.3,0.3,0.36 -ISO 1600

But with the libcamera this does not work anymore.

Does anyobdy know how to do something similar using libcamerify?