yuvinactive: command not found

Have You tried accessing the binary with the full path?

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH

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/yuvinactive - from package: mjpegtools

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