Once your modifications are complete, unmount the directory and convert the raw filesystem back into a sparse Android partition image:
For users who prefer a graphical user interface (GUI) or an all-in-one Windows environment, the is highly popular in tech forums.
: Use unpack.py with the firmware path to break the CtvUpgrade.bin into individual partition images (like MBOOT , system , recovery , and boot ).
: Another set of scripts specifically designed to unpack and repack MStar firmware. mstarutils (GitHub) mstar android tv firmware tools repack
Before diving into the tools, it is crucial to understand what you are modifying. An MStar Android TV firmware file is typically packaged as a single monolithic binary file (often named MstarUpgrade.bin ). Inside this package lies a complex partition system:
While some tools work on Windows, a Linux environment (Ubuntu or WSL on Windows) handles Android file permissions ( ext4 ) much better. Windows often strips out vital Linux file permissions, leading to boot loops.
Next, clone a reputable repository for MStar binary parsing: git clone https://github.com cd mstar-bin-tool Use code with caution. Step-by-Step Guide: Unpacking, Modifying, and Repacking Step 1: Unpacking the Master Binary ( MstarUpgrade.bin ) Once your modifications are complete, unmount the directory
: Used to retrieve AES and RSA keys from the MBOOT binary for secure firmware. MStar_bintool (GitHub)
: Necessary to execute the underlying automation scripts. You can download it directly from the Official Python Website.
If you have a .zip file, extract the contents to a folder. You will likely see a file named MstarUpgrade.bin or similar. If you have a raw NAND dump (backup), you are already halfway there. mstarutils (GitHub) Before diving into the tools, it
It automates the extraction and conversion of the MStar dump file. You load the .bin file into the software, and it breaks it down into individual .img or .bin files ready for editing.
Before flashing any custom binary, secure a full original firmware copy or an eMMC dump via ISP tools if possible.