“MP4Box is a multimedia packager, with a vast number of functionalities: conversion, splitting, hinting, dumping and others. It can be used for performing many manipulations on multimedia files like AVI, MPG, TS, but mostly on ISO media files (e.g. MP4, 3GP). It is a command-line tool so it can be utilized by scripts like the php script that I want to use. MP4Box is included in the GPAC package.” I want …