UYVYtoYUV422: 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/UYVYtoYUV422 - from package: dirac

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

Error in other languages:
UYVYtoYUV422: bevel nie gevind nie
UYVYtoYUV422: comandă negăsită
UYVYtoYUV422: comando não encontrado
UYVYtoYUV422: commande introuvable
UYVYtoYUV422: command not found
UYVYtoYUV422: käsku ei ole
UYVYtoYUV422: không tìm thấy lệnh
UYVYtoYUV422: komanda nerasta
UYVYtoYUV422: Kommando nicht gefunden.
UYVYtoYUV422: kommandot finns inte
UYVYtoYUV422: komut yok
UYVYtoYUV422: nie znaleziono polecenia
UYVYtoYUV422: níor aimsíodh an t-ordú
UYVYtoYUV422: no se encontró la orden
UYVYtoYUV422: no s'ha trobat l'ordre
UYVYtoYUV422: opdracht niet gevonden
UYVYtoYUV422: parancs nem található
UYVYtoYUV422: perintah tidak ditemukan
UYVYtoYUV422: príkaz nenájdený
UYVYtoYUV422: příkaz nenalezen
UYVYtoYUV422: команда не найдена
UYVYtoYUV422: командата не е открита
UYVYtoYUV422: 命令找不到
UYVYtoYUV422: コマンドが見つかりません