{"success":true,"data":{"ext":"mf4","name":"UnfinalizedMeasurement Data Format","description":"Unfinalized Measurement Data Format (MF4) is a file format used by ASAM, the Association for Standardization of Automation and Measuring Systems, for storing measurement data in an unfinalized state. It is used in automotive and industrial testing to record sensor signals, event logs, and vehicle diagnostics during data acquisition. The format is generally safe, but unfinalized files may be incomplete or inconsistent because they are written while capture is still in progress.","mime":[],"risk_level":"Safe","signatures":[{"hex":"55 6E 46 69 6E 4D 46","offset":0,"sources":[{"name":"Gary Kessler","url":"https://www.garykessler.net/library/file_sigs_GCK_latest.html"}]}],"related":[],"usage":{"python":"def is_mf4(file_path: str) -> bool:\n    \"\"\"Check if file is a valid MF4 by magic bytes.\"\"\"\n    signature = bytes([0x55, 0x6E, 0x46, 0x69, 0x6E, 0x4D, 0x46])\n    with open(file_path, \"rb\") as f:\n        return f.read(7) == signature","node":"function isMF4(buffer: Buffer): boolean {\n  const signature = Buffer.from([0x55, 0x6E, 0x46, 0x69, 0x6E, 0x4D, 0x46]);\n  return buffer.subarray(0, 7).equals(signature);\n}","go":"func IsMF4(data []byte) bool {\n    signature := []byte{0x55, 0x6E, 0x46, 0x69, 0x6E, 0x4D, 0x46}\n    if len(data) < 7 {\n        return false\n    }\n    return bytes.Equal(data[:7], signature)\n}"}}}