Get the tracking frame
Return the box the camera is tracking a subject in, after a
remoteTouch. The shape is the same as getAFAreaPosition — normalized
for overlays, position in the coordinate space remoteTouch accepts,
raw as the camera reports it — so the same overlay code renders both.
Poll this to follow a moving subject: the camera updates the frame on its own once tracking has been seeded.
type is target-af for the subject being tracked, non-target-af for a
candidate the camera is showing but not acting on.
Empty is a normal answer
With nothing being tracked this returns 200 with frames: [] and
available: true — the property was readable, there was just no subject.
A 400 means the property could not be read at all, usually because live
view is not running.
Two ways to get a frame here, both measured on an ILCE-7M4:
remoteTouch, with the body’s Touch Func. in Shooting set toTouch Tracking. Tracking then holds on its own with no button held.- The camera tracking for its own reasons — a tracking focus area with AF
engaged. Holding
af-oninTracking: Expand Flexible Spotreports atarget-afframe that disappears on release.
With the ILCE-7M4 default of Touch Focus, a touch moves the AF frame
instead and nothing appears here — read getAFAreaPosition in that case.

