Here's a robust working script that combines CANdas and asammdf to perform the conversion. It's a starting point for building your own automated tools:
Not every conversion requires a complex script or a full-blown commercial application. For occasional, ad-hoc conversions on a Windows PC, the is an excellent, free choice. Developed by PEAK-System, this tool supports converting BLF files to various formats, including the newer TRC format and MF4. It provides a clean graphical user interface, making it accessible for engineers who are not comfortable with command-line tools. Its version history shows continuous updates, ensuring compatibility with the latest file format revisions. convert blf to mf4 new
If you would like to tailor this workflow to your specific engineering pipeline, let me know: Here's a robust working script that combines CANdas
from asammdf import MDF # Load the BLF logging file and automatically convert/export to MF4 # Note: You may need the 'canmatrix' or 'vector' helper plugins installed depending on bus complexity with MDF.concatenate(["input_data.blf"]) as mdf_file: mdf_file.save("output_data.mf4", overwrite=True) Use code with caution. Method 2: Vector Tools (CANalyzer / CANoe) Developed by PEAK-System, this tool supports converting BLF
This is the most common method for manual conversion.
You might wonder: Is MF4 still relevant? With the rise of and Arrow Flight , some teams are skipping MF4. However, ASAM MDF 4.20 (released Q4 2024) adds native support for Zstandard compression and JSON-based attachments.
A BLF file typically stores raw CAN IDs and hexadecimal payloads. To generate a meaningful MF4 file containing human-readable signals (e.g., Engine_Speed = 2500 RPM), the conversion tool must reference the exact network database ( .dbc , .fibex , or .arxml ) used during the test.