arista-transcode: 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/arista-transcode - from package: arista

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

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