mp4edit

mp4edit is a tool to add/insert/remove/replace atom/box items of an MP4 file.

Usage

MP4 File Editor - Version 1.1
(Bento4 Version 1.4.3.0)
(c) 2002-2012 Axiomatic Systems, LLC

usage: mp4edit [commands] <input> <output>
    where commands include one or more of:
    --insert <atom_path>:<atom_source_file>[:<position>]
    --remove <atom_path>
    --replace <atom_path>:<atom_source_file>