OZIP File to Scatter File Converter: A High-Quality Solution
Introduction
In the realm of firmware development and flashing, OZIP and scatter files serve distinct purposes. OZIP files are compressed archives used by some Chinese smartphones to package firmware, while scatter files are text files that describe the layout of the firmware components on a device's memory. Converting OZIP files to scatter files is essential for flashing firmware on devices that require scatter files for the flashing process. This report presents a high-quality OZIP file to scatter file converter, addressing the needs of developers and technicians in the firmware flashing domain.
Background
OZIP Files: OZIP files are specifically used in certain Chinese smartphone brands for firmware distribution. They contain a collection of files necessary for updating or flashing a device, compressed into a single file. OZIP files are opened and managed by specific flashing tools.
Scatter Files: Scatter files, on the other hand, are used by flashing tools like SP Flash Tool to define the memory layout of a device. They contain information on where each component of the firmware should be written in the device's memory.
Requirements for Conversion
The conversion process from OZIP to scatter file format must accurately map the components within the OZIP file to their respective locations as defined in a scatter file. The converter needs to:
Proposed Solution
The proposed OZIP to scatter file converter will be a software tool with a user-friendly interface. It will support the following features:
Technical Implementation
The converter will be developed using a programming language such as Python, chosen for its ease of use, powerful libraries (e.g., pyzipper for zip operations), and cross-platform compatibility.
Algorithm
OZIP Extraction:
zipfile module to read the OZIP file.Memory Layout Identification:
Scatter File Creation:
Conclusion
The OZIP file to scatter file converter is a critical tool for the firmware development community, especially for those working with devices that use OZIP files but require scatter files for flashing. The proposed solution aims to provide a reliable, user-friendly, and high-quality conversion process, facilitating smoother firmware development and flashing operations.
Future Enhancements
An MTK scatter file cannot be directly converted from an .ozip file because they are entirely different file types.
.ozip files are encrypted update packages used by Oppo and Realme devices.
Scatter files are text files that act as maps for MediaTek (MTK) flashing tools.
To get a scatter file, you must first decrypt and extract the .ozip firmware. 🛠️ How to Get a Scatter File from an OZIP Step 1: Decrypt the OZIP File
You cannot read the contents of an .ozip file directly. You must convert it into a standard .zip file first. Use a python-based tool like OppoDecrypt or ozip decryptor.
Run the tool via command line to output a standard flashable zip. Step 2: Extract the Firmware
Once you have the decrypted .zip file, extract its contents using any zip extractor (like 7-Zip or WinRAR). Step 3: Locate or Generate the Scatter File Look through the extracted folder:
Check the folder: Many MediaTek-based firmware packages already include the MTxxxx_Android_scatter.txt file inside the main directory.
Generate one: If it is missing, you can use a tool like WWR MTK or Miracle Box to read the extracted preloader.bin or firmware folder and generate a fresh scatter file.
To help you get the exact files you need, could you tell me: What is your specific phone model? What chipset does it use (e.g., MT6765, MT6877)? Are you trying to unbrick the device or flash a custom ROM?
I can guide you to the specific decryption tools or help you find a pre-made scatter file!
Download the tool from a trusted source (XDA Developers or official GitHub repository). Disable Windows Defender temporarily (false positives are common due to kernel-level packing).
| ID | Requirement |
|----|--------------|
| FR-9 | Verify that total partition layout fits within known flash geometry (e.g., eMMC/UFS size from OZIP header). |
| FR-10 | Detect overlaps or gaps between partitions and warn the user. |
| FR-11 | Provide an option to validate generated scatter against a real device (by comparing ro.partitions.* from a running device). |
| ID | Requirement | |----|--------------| | FR-12 | Save scatter file as plain text (UTF-8) with one partition per line. | | FR-13 | Option to output as JSON for programmatic use. | | FR-14 | Option to generate a reverse scatter‑to‑OZIP mapping file (for repacking). | | FR-15 | Batch mode – convert multiple OZIP files in one run. |
Navigate to the output folder. You should see:
scatter.txt (Open it. Check line 10: partition_index: SYS0)images/ containing boot.img, vbmeta.img, super.img, etc.The Quality Test: Open scatter.txt in Notepad. Scroll to the super partition. If the linear_start_addr is a 16-digit hex number starting with 0x and the partition_size is not zero, your converter worked perfectly.
| NFR | Description | |-----|-------------| | NFR-1 | Performance – Convert a typical 1.5 GB OZIP in under 30 seconds on a standard SSD system. | | NFR-2 | Memory usage – Stream OZIP reading to avoid loading entire file into RAM (cap at 256 MB). | | NFR-3 | Cross‑platform – Provide CLI tool (Python script + PyInstaller binary) for all major OSes. | | NFR-4 | Extensibility – Plugin system for new OZIP variants (vendor‑specific encryption). | | NFR-5 | Logging – Verbose mode outputting each parsing step and address calculation. |
Most OPPO/Realme devices use MediaTek chips, so this example uses MTK Client.
pip install pyserial usb pyusb
git clone https://github.com/bkerler/mtkclient
cd mtkclient
pip install -r requirements.txt