vdm_encode: 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/vdm_encode - from package: vdmfec

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

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