Obvious exposure stepping shown - how do I correct it?

t. La

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This is my first post here asking for some help about exposure stepping. I have been screwing around with the Yi cam to get the perfect video for my FPV using script which was genereated by xyc.sh script. The exposure stepping is terrible in my video. Youtube video link attached. Is there any other setting to correct or at least minimize this unwanted effect? I suspect that YiTune (flat movie) mode make the exposure stepping obvious. Thanks for the help.

 
This is the autoexec.ash file which i was trying to capture at 48fps



# Generated by XYC 1.0.2 Alex, Thu Jan 1 00:04:35 UTC 1970
# https://github.com/alex-agency/XYC

#vibrance/saturation adjustments
t ia2 -adj ev 10 0 70 0 0 150 0

#shadow/highlight clipping adjustments
#this makes blacks not crushed
#set long exposure level [0~255]
t ia2 -adj l_expo 163


#this gets back the highlights
#set Auto Knee level [0~255]
t ia2 -adj autoknee 255

#set gamma level [0~255]
t ia2 -adj gamma 160

#set ISO and Exposure
# exp: [iso_idx][exp_idx][gain_idx], 0 auto
t ia2 -ae exp 100 1100 0

#set Noise Reduction
# tidx: [ev_idx][nf_idx][shutter_idx], -1 disable
# [nf_idx]: 0-16383
t ia2 -adj tidx -1 0 -1

#Sharpness: 0 100 211
#set sharpness
t is2 -shp mode 0
t is2 -shp fir 100 0 0 0 0 0 0
t is2 -shp max_change 5 5
t is2 -shp cor d:\sharpening.config
sleep 1

#set video and AV out 1080p@48
writeb 0xC06CC426 0x20
writel 0xC05C2F0C 0x04380780
writel 0xC05C2F10 0x0403

#set 40Mb bitrate for all resolutions
#640x480 24fps
writew 0xC05C2692 0x4220
#640x480 30fps
writew 0xC05C2392 0x4220
#640x480 48fps
writew 0xC05C2662 0x4220
#640x480 60fps
writew 0xC05C2362 0x4220
#640x480 120fps
writew 0xC05C2842 0x4220
#848x480 24fps
writew 0xC05C2632 0x4220
#848x480 30fps
writew 0xC05C21E2 0x4220
#848x480 48fps
writew 0xC05C2602 0x4220
#848x480 60fps
writew 0xC05C21B2 0x4220
#848x480 120fps
writew 0xC05C28D2 0x4220
#1280x720 24fps
writew 0xC05C25D2 0x4220
#1280x720 30fps
writew 0xC05C2182 0x4220
#1280x720 48fps
writew 0xC05C25A2 0x4220
#1280x720 60fps
writew 0xC05C2122 0x4220
#1280x720 120fps
writew 0xC05C2812 0x4220
#1280x960 24fps
writew 0xC05C2572 0x4220
#1280x960 30fps
writew 0xC05C22A2 0x4220
#1280x960 48fps
writew 0xC05C2542 0x4220
#1280x960 60fps
writew 0xC05C2272 0x4220
#1600x1200 24fps
writew 0xC05C2512 0x4220
#1600x1200 30fps
writew 0xC05C20C2 0x4220
#1600x1200 48fps
writew 0xC05C24E2 0x4220
#1600x1200 60fps
writew 0xC05C2092 0x4220
#1920x1080 24fps
writew 0xC05C2482 0x4220
#1920x1080 30fps
writew 0xC05C1F72 0x4220
#1920x1080 48fps
writew 0xC05C2452 0x4220
#1920x1080 60fps
writew 0xC05C1EE2 0x4220
#2304x1296 30fps
writew 0xC05C1EB2 0x4220

#set 4GB file weight limit
writew 0xC03A8520 0x2004

#set AAA function
# -3a [ae][awb][af][adj]: turn on/off ae/awb/af/adj
# ae = [0|1], 0:eek:n 1:eek:ff AE
# awb = [0|1], 0:eek:n 1:eek:ff AWB
# af = [0|1], 0:eek:n 1:eek:ff AF
# adj = [0|1], 0:eek:n 1:eek:ff ADJ
t ia2 -3a 1 1 0 1

#Greeting script
#front led blink
t gpio 6 sw out1
sleep 1
t gpio 6 sw out0
t gpio 54 sw out1
sleep 1
t gpio 54 sw out0
#short beep & front leds
t gpio 6 sw out1
t gpio 54 sw out1
t pwm 1 enable
sleep 1
t gpio 6 sw out0
t gpio 54 sw out0
t pwm 1 disable
 
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