GoPro GPMF

The bounded parser preserves four-character keys, type, repeat count, raw bytes, scale, parser version, and unsupported keys. Phase 10 recognizes GPS5, GPSP, ACCL, GYRO, ORIN, SCAL, SIUN, and STMP; deterministic fixtures exercise GPS, accelerometer, and unknown-key preservation.

Lengths, padding, numeric widths, and bounds are validated. Scaling is applied only after SCAL; units are never guessed. Raw parsed and normalized telemetry remain separately exportable.