📷 GoPro Hero3 Black - Dynamic Bracketing

[Garguilasks]

Hi! I am new to Github and to reverse engineering but i want to make a dynamic way to do bracketing for my workflow taking 360 hdri with my gopro.

To date, with the help of KonradIT's github I know how to program an autoexec.ash file to make the camera go into photo mode and take a series of overexposed and underexposed photos, including an intermediate photo that would be correct exposed (I would later merge those photos on the PC to get the HDR image).

I attach an example of the reference code:

t app appmode photo
sleep 2

t ia2 -ae still_exp 100 1000
t app button shutter PR
sleep 2

t ia2 -ae still_exp 100 600
t app button shutter PR
sleep 2

t ia2 -ae still_exp 100 500
t app button shutter PR
sleep 2

t ia2 -ae still_exp 100 255
t app button shutter PR
sleep 4

t ia2 -ae still_exp 100 180
t app button shutter PR
sleep 5

t ia2 -ae still_exp 100 125
t app button shutter PR
sleep 6

t ia2 -ae still_exp 100 85
t app button shutter PR
sleep 7

My problems come when I have to:

1. Modify the value of the photograph with the correct exposure in the place where I would be working, since to do so I have to put the SD card in a computer and change the value, which is not very convenient.
2. Modify the exposure values of each overexposed or underexposed photograph in relation to the correct exposure previously selected. For example, if the correct exposure value at a given time is X, the first overexposed photograph would be X/2, the second X/3 and the third X/4. For underexposed photographs it would be the opposite, the first X x 2, the second X x 3 and the third X x 4.

My question is, would it be possible to program in some way that pressing one of the buttons once or several times would change the X value, or in other words, the base exposure value? And in parallel, could the exposure values of each under and overexposed photograph be programmed based on the base exposure? Is that possible within an autoexec.ash file?

If none of this is possible, what do you recommend I do to achieve what I am planning?

Finally, I would like to sincerely thank anyone who can help or provide any information that may benefit the resolution of the problem.