ESP32-CAM flash LED is controlled by library. (How to interface)

[Wirewrap]

Using an ESP32-CAM module with the Espressif esp_camera library for Arduino.
Works to my liking except for one thing.

When I take pictures the LED is flickering on and off, can't find where it is done.
I would like to have programmatic control myself over the FLASH LED.
Where is this defined?

[Wirewrap]

Found the reason for this.
IO04 is shared between Flash LED and SD card.
Setting the SD driver in 1-Wire mode leaves IO04 exclusively for LED control.