[Upgrading, Modifying and Unlocking] spannernick:
I got it working on 107h_test on Windows only, I forget to put in /rkaf in the commandline,, I was able to unpack it, then pack it but not on Linux Mint 20, I was able to unpack but It crashes on Linux when you try to pack it..

On Windows 10

C:\AA-MD-Flashback-2018\imgRePackerRK>imgRePackerRK.exe /rkaf sega_update.img.dump

imgRepackerRK (version 1.07h_test windows)
Rockchip firmware batch/update images unpacker/packer

(c) RedScorpio, Moscow, 2013-2019
RedScorpio@land.ru

Detected OS: Windows 8 Pro [build 9200] x64
Real OS: Windows 10 Pro [build 19042] x64
==========================[ START ]==========================

--- Firmware creating ---

- "image.cfg" configuration file reading -
image.cfg was read

- "package-file" configuration file reading -
"package-file" was read

- "parameter" configuration file reading -
"parameter" was read

- Files checking -
parameter (parameter) checked (file size = 0x0000027c, partition size = 0x00400000)
emulator (emulator_scd.img) checked (file size = 0x0062f000, partition size = 0x00800000)
data (data_no_test_sd_on.img) checked (file size = 0x08400000, partition size = 0xfffffc00)
backup (RESERVED) skipped

-- Injecting into "sega_update.img" --
- update.img header (RKAF) injecting -
Image properties:
Type RockChip update image ("RKAF")
Id "007"
Model "rk30sdk"
Manufacturer "RK30SDK"
Version 4.4.2

update.img header injected

- Files injecting -
Image files count = 4

"sega_update.img.dump\parameter.parm" signed
parameter (RockChip PARM signed file) injected
emulator (SquashFS image) injected
data (ext4 image) injected
backup skipped

- rkCRC check summ of update.img injecting -
rkCRC = 0x7c0f2e5f
rkCRC check summ injected

C:\AA-MD-Flashback-2018\imgRePackerRK>

On Linux Mint 20

commodoreos@commodoreos-virtual-machine:~/AA_MD_Flashback_2018/imgRePackerRK$ /home/commodoreos/AA_MD_Flashback_2018/imgRePackerRK/imgrepackerrk /rkaf sega_update.img.dump

imgrepackerrk (version 1.07h_test linux)
Rockchip firmware batch/update images unpacker/packer

(c) RedScorpio, Moscow, 2013-2019
RedScorpio@land.ru

Detected OS:
Linux Mint 20 Ulyana \n \l
DISTRIB_ID=LinuxMint
DISTRIB_RELEASE=20
DISTRIB_CODENAME=ulyana
DISTRIB_DESCRIPTION="Linux Mint 20 Ulyana"
NAME="Linux Mint"
VERSION="20 (Ulyana)"
ID=linuxmint
ID_LIKE=ubuntu
PRETTY_NAME="Linux Mint 20"
VERSION_ID="20"
HOME_URL="https://www.linuxmint.com/"
SUPPORT_URL="https://forums.linuxmint.com/"
BUG_REPORT_URL="http://linuxmint-troubleshooting-guide.readthedocs.io/en/latest/"
PRIVACY_POLICY_URL="https://www.linuxmint.com/"
VERSION_CODENAME=ulyana
UBUNTU_CODENAME=focal
==========================[ START ]==========================

--- Firmware creating ---

- "image.cfg" configuration file reading -
image.cfg was read

- "package-file" configuration file reading -
"package-file" was read

- "parameter" configuration file reading -
"parameter" was read

- Files checking -
package-file (package-file) checked
parameter (parameter) checked (file size = 0x0000027c, partition size = 0x00400000)
emulator (emulator_scd.img) checked (file size = 0x0062f000, partition size = 0x00800000)
data (data_no_test_sd_on.img) checked (file size = 0x08400000, partition size = 0xfffffc00)
backup (RESERVED) skipped

-- Injecting into "sega_update.img" --
- update.img header (RKAF) injecting -
Image properties:
Type RockChip update image ("RKAF")
Id "007"
Model "rk30sdk"
Manufacturer "RK30SDK"
Version 4.4.2

update.img header injected

- Files injecting -
Image files count = 5

Segmentation fault (core dumped)
commodoreos@commodoreos-virtual-machine:~/AA_MD_Flashback_2018/imgRePackerRK$

The Linux version thinks there's 5 files when there are only 4 files, the Windows version say only 4 files.