add dynamic annotation to a video or pictures

[Eisbahn]

Hi,

how could I bring dynamic text as annotation to a picture and video? If I make something like this
camera.pre_callback = apply_annotation1 [...] camera.pre_callback = apply_annotation2 [...] camera.pre_callback = apply_annotation1
I do sometimes see only the annotation 1, but never 2 (depending on time...?). Seems the lib needs some time to deal with a new set of annotation or even some stop/start of the cam is needed to have it applied. Is there any chance to pas it via parameter like in good old days as in picamera implementation, e.g.
`

add the camera location, and actual status as annotation to the videostream

camera.annotate_text = location + " circular buffer"
[...]
camera.annotate_text = location + " trigger detected"
`
Or is there some simple trick to alter the annotation during runtime with picamera2?

Best, Hans