| Tool | Type | OS | Speed | Signal Names | Scripting | Cost | |------|------|-----|-------|--------------|-----------|------| | | GUI/COM | Win | Fast | Yes (DBC/ARXML) | VBScript | Commercial | | Vector CANalyzer/CANoe | GUI/COM | Win | Fast | Yes | CAPL/Python | Commercial | | asammdf (Python) | CLI/Python | All | Medium | Yes (with dbc) | Full Python | Free (Open Source) | | PyViSim (Python) | CLI/Python | All | Slow | Yes | Python | Free | | MDF4 Lib (C/Python) | Library | All | Very Fast | Limited | C/Python | Free (LGPL) | | NI Diadem | GUI/script | Win | Fast | Yes (via Vector add-on) | VBS/Python | Commercial | | CANetc MDF4 Converter | GUI | Win | Medium | Yes | – | Free/Paid |
' VBScript example Dim app, meas Set app = CreateObject("CANape.Application") Set meas = app.OpenMeasurement("C:\data\log.blf") meas.ExportMDF "C:\data\log.mf4", 1 ' 1 = MF4 format meas.Close
With the rise of Autonomous Driving (ADAS) and big data analytics, teams cannot afford vendor lock-in. The "new" requirement for 2025 is high-speed, batch conversion that preserves metadata (e.g., ECU names, signal comments, bus statistics) without launching heavy GUI applications. convert blf to mf4 new
Export the internal data portal mapping structure directly to an ASAM compliant .mf4 format. Troubleshooting Common Conversion Challenges 1. Missing Database/Decoding Information
Add your target files, assign your database (DBC/ARXML), and click . Using Vector Command Line (Automated Windows Scripts) | Tool | Type | OS | Speed
class BLFHandler(FileSystemEventHandler): def on_created(self, event): if event.src_path.endswith('.blf'): mdf = MDF(event.src_path) mdf.save(event.src_path.replace('.blf', '.mf4'), compression=2)
BLF stores only CAN IDs and raw bytes. Obtain the matching .dbc (CAN) or .arxml (CAN/LIN/Ethernet) database from the vehicle or logger configuration. Without it, you only get raw hex channels. Troubleshooting Common Conversion Challenges 1
Vector has finally released a dedicated command-line tool called blf2mdf.exe (included in v22.0+).
# Read the source file mdf = MDF(input_blf)
from asammdf import MDF, Signal import can