In short, while is your go-to for fast, efficient logging of network traffic, MF4 is the gold standard when you need to share data across different teams, departments, or companies, or when you want to combine it with other measurement data.
By following the steps above, you will unlock faster data processing, better cloud compatibility, and future-proof your measurement data for the next decade of vehicle development.
MF4 files can be slightly larger than BLF files due to the metadata headers and structure overhead. Ensure you have sufficient disk space when converting large batches.
, converts message-based BLF logs into signal-based MF4 logs. It requires database files (DBC or CDD) to interpret the signal data. CANoe/CANalyzer convert blf to mf4 new
| Feature | BLF | MF4 | |--------|-----|-----| | | Absolute PC time or device time | Relative to measurement start (0.0s) | | Data types | CAN, LIN, FlexRay, Ethernet | Same, plus structured events | | Compression | None (by default) | Supported (zlib, deflate) | | Metadata | Proprietary Vector fields | ASAM standardized |
This comprehensive guide covers the newest, most efficient methods to convert BLF to MF4 using open-source tools, commercial software, and automated Python pipelines. Why Convert BLF to MF4?
The asammdf library features a native MDF class that can read BLF files directly and save them as MF4. In short, while is your go-to for fast,
rexdesk convert-folder -F mf4 -I "C:\path\to\blf\folder" -O "C:\path\to\mf4\output"
def convert_blf_to_mf4(input_path, output_path): print(f"Loading input_path... (This may take a moment for large files)") try: # The 'new' part: MDF natively reads BLF extensions without specifying format mdf_obj = MDF(input_path)
: If you use PEAK-System hardware, their PEAK-Converter for Windows supports converting various trace formats, including third-party ones, into MF4. Ensure you have sufficient disk space when converting
Vector offers a tiny, free utility called (often bundled with CANoe Demo).
| Method | Time | File Size (Output) | Metadata Preserved | | :--- | :--- | :--- | :--- | | | 9 min 30 sec | 2.1 GB | Yes | | CANape 22+ CLI (New) | 1 min 12 sec | 1.9 GB | Yes | | asammdf v7.0 (Old lib) | 4 min 50 sec | 2.4 GB | Partial | | asammdf v7.5+ (New) | 2 min 10 sec | 1.8 GB | Full |
MF4 supports massive file sizes (beyond 4 GB) and features internal compression algorithms.