cd mp4box cargo build --release

Print the box tree

target/release/mp4dump path/to/video.mp4

Decode known boxes when available (example includes ftyp)

target/release/mp4dump path/to/video.mp4 --decode

Dump raw payload bytes of a given box (first match at all depths)

target/release/mp4dump path/to/video.mp4 --raw stsd --bytes 256

Dump a UUID box payload (prefix match ok)

target/release/mp4dump path/to/file.mp4 --raw uuid:00000000-... # or compact hex prefix after 'uuid:'