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Key Length Value encoding and decoding

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KLV in Python

A Python parser for KLV (Key Length Value) encoded data. KLV encoding is commonly used in the motion picture industry.

Unit Tests

Install nose:

pip install nose

Run the command nosetests in the root directory.

Encode Key/Value

import klv
key = [0x03, 0x2E, 0x5F, 0xAB, 0x08, 0x12, 0x2F, 0x0C,
       0xEE, 0x33, 0x00, 0x01, 0x02, 0x45, 0x6D, 0xDD]
value = [0x05, 0x04, 0x03, 0x02, 0x01]
klv_msg = klv.encode(key, value)

klv_msg will be a bytearray; to convert to an array of ints, use list(klv_msg) and to convert to a string of bytes, use str(klv_msg).

Decode KLV Messages

import klv
key, value = klv.decode(klv_msg, 16)

Decode takes the form decode(<klv>, <key length>) to accomodate messages with different length keys. The key and value results are bytearrays.

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