yuvdeinterlace: 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/yuvdeinterlace - from package: mjpegtools

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

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