{"success":true,"data":{"ext":"mj2","name":"MJ2","description":"MJ2, or Motion JPEG 2000, is a digital video container and coding format defined by the Joint Photographic Experts Group and standardized by ISO/IEC as part of the JPEG 2000 family. It is used for archival video storage, digital cinema, medical imaging, and professional editing workflows. It is generally considered safe, though like other media formats it may expose vulnerabilities in decoders; it is less common than newer video formats.","mime":["video/mj2"],"risk_level":"Safe","signatures":[{"hex":"00 00 00 0C 6A 50 20 20 0D 0A 87 0A","offset":0,"sources":[{"name":"Apache Tika","url":"https://raw.githubusercontent.com/apache/tika/main/tika-core/src/main/resources/org/apache/tika/mime/tika-mimetypes.xml"},{"name":"Wikipedia","url":"https://en.wikipedia.org/wiki/List_of_file_signatures"}]}],"related":["mjp2","j2k","jp2","jpc","jpf","jpg2"],"usage":{"python":"def is_mj2(file_path: str) -> bool:\n    \"\"\"Check if file is a valid MJ2 by magic bytes.\"\"\"\n    signature = bytes([0x00, 0x00, 0x00, 0x0C, 0x6A, 0x50, 0x20, 0x20, 0x0D, 0x0A, 0x87, 0x0A])\n    with open(file_path, \"rb\") as f:\n        return f.read(12) == signature","node":"function isMJ2(buffer: Buffer): boolean {\n  const signature = Buffer.from([0x00, 0x00, 0x00, 0x0C, 0x6A, 0x50, 0x20, 0x20, 0x0D, 0x0A, 0x87, 0x0A]);\n  return buffer.subarray(0, 12).equals(signature);\n}","go":"func IsMJ2(data []byte) bool {\n    signature := []byte{0x00, 0x00, 0x00, 0x0C, 0x6A, 0x50, 0x20, 0x20, 0x0D, 0x0A, 0x87, 0x0A}\n    if len(data) < 12 {\n        return false\n    }\n    return bytes.Equal(data[:12], signature)\n}"},"category":"Video"}}