mdf = MDF(input_path, sync_timestamps=True) Error: MF4 output is 10x larger than the BLF input. Cause: Default MF4 saves XML data uncompressed. Fix: Use compression=2 (Deflate) or compression=3 (LZ4) when saving:
Get-ChildItem -Filter *.blf | ForEach-Object $output = $_.BaseName + ".mf4" Write-Host "Converting $($_.Name) to $output" python -c "from asammdf import MDF; MDF('$($_.FullName)').save('$output', compression=2)" convert blf to mf4 new
mdf.save(output_path, compression=3) # LZ4 is fastest The "new" trend is data lake automation. Here is a bash script to convert an entire folder: Here is a bash script to convert an
import sys from asammdf import MDF 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) We tested a 2
Introduction: The Data Conversion Dilemma In the world of automotive engineering, telematics, and data analysis, file formats are the silent gatekeepers of productivity. Two of the most common proprietary formats you will encounter are BLF (Binary Logging Format) , developed by Vector Informatik, and MF4 (Measurement Data Format 4) , the standard defined by ASAM (Association for Standardization of Automation and Measuring Systems).
We tested a 2.4GB BLF file (2 hours of 12x CAN channels) on an i7-12700K.