YUV422toUYVY: 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/YUV422toUYVY - from package: dirac

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

Error in other languages:
YUV422toUYVY: bevel nie gevind nie
YUV422toUYVY: comandă negăsită
YUV422toUYVY: comando não encontrado
YUV422toUYVY: commande introuvable
YUV422toUYVY: command not found
YUV422toUYVY: käsku ei ole
YUV422toUYVY: không tìm thấy lệnh
YUV422toUYVY: komanda nerasta
YUV422toUYVY: Kommando nicht gefunden.
YUV422toUYVY: kommandot finns inte
YUV422toUYVY: komut yok
YUV422toUYVY: nie znaleziono polecenia
YUV422toUYVY: níor aimsíodh an t-ordú
YUV422toUYVY: no se encontró la orden
YUV422toUYVY: no s'ha trobat l'ordre
YUV422toUYVY: opdracht niet gevonden
YUV422toUYVY: parancs nem található
YUV422toUYVY: perintah tidak ditemukan
YUV422toUYVY: príkaz nenájdený
YUV422toUYVY: příkaz nenalezen
YUV422toUYVY: команда не найдена
YUV422toUYVY: командата не е открита
YUV422toUYVY: 命令找不到
YUV422toUYVY: コマンドが見つかりません