mp4trackdump: command not found

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

If it's empty, You may set the PATH variable with this command

export PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin"

On CentOS possible default full paths are:

/usr/bin/mp4trackdump - from package: libmp4v2

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/mp4trackdump - from package: mp4v2-utils

You may install the required package with command apt-get install {package}

Error in other languages:
mp4trackdump: bevel nie gevind nie
mp4trackdump: comandă negăsită
mp4trackdump: comando não encontrado
mp4trackdump: commande introuvable
mp4trackdump: command not found
mp4trackdump: käsku ei ole
mp4trackdump: không tìm thấy lệnh
mp4trackdump: komanda nerasta
mp4trackdump: Kommando nicht gefunden.
mp4trackdump: kommandot finns inte
mp4trackdump: komut yok
mp4trackdump: nie znaleziono polecenia
mp4trackdump: níor aimsíodh an t-ordú
mp4trackdump: no se encontró la orden
mp4trackdump: no s'ha trobat l'ordre
mp4trackdump: opdracht niet gevonden
mp4trackdump: parancs nem található
mp4trackdump: perintah tidak ditemukan
mp4trackdump: príkaz nenájdený
mp4trackdump: příkaz nenalezen
mp4trackdump: команда не найдена
mp4trackdump: командата не е открита
mp4trackdump: 命令找不到
mp4trackdump: コマンドが見つかりません