yuvycsnoise: 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/yuvycsnoise - from package: mjpegtools

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

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