@veye_xumm OK, thanks. Solved it by adding vc.ril.hvs component before h264 encoder and doing some fancy overlays by libcairo.

@veye_xumm i used text annotation function from the original RPI cam module to embed some important data to my RPI based car dashcam's recordings. Is there any workaround to overlay a text on h264 encoded video with veye camera sensors? I really need it, can you give me some hints? Thanks, Michał.