cfourcc: 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 Debian possible default full paths are:

/usr/bin/cfourcc - from package: cfourcc

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

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