Okay, it will be better to do this with the event mode. Data is far more compact. Do this… use Tools→Install Latest Dev firmware to install the latest firmware for the RT1062. Then, you can run any example here: openmv/scripts/examples/01-Camera/03-Event-Cameras/02-Genx320 at master · openmv/openmv · GitHub
See this deep buffer example: openmv/scripts/examples/01-Camera/03-Event-Cameras/02-Genx320/genx320_event_mode_deep_buffer.py at master · openmv/openmv · GitHub
We support up to 65536 deep event buffers. This is like multiple seconds of events, we could go higher, but, you should be covered by this depth.