pes2es: 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
/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/pes2es - from package: opencaster

You may install the required package with command apt-get install {package}
Error in other languages:
pes2es: bevel nie gevind nie
pes2es: comandă negăsită
pes2es: comando não encontrado
pes2es: commande introuvable
pes2es: command not found
pes2es: käsku ei ole
pes2es: không tìm thấy lệnh
pes2es: komanda nerasta
pes2es: Kommando nicht gefunden.
pes2es: kommandot finns inte
pes2es: komut yok
pes2es: nie znaleziono polecenia
pes2es: níor aimsíodh an t-ordú
pes2es: no se encontró la orden
pes2es: no s'ha trobat l'ordre
pes2es: opdracht niet gevonden
pes2es: parancs nem található
pes2es: perintah tidak ditemukan
pes2es: príkaz nenájdený
pes2es: příkaz nenalezen
pes2es: команда не найдена
pes2es: командата не е открита
pes2es: 命令找不到
pes2es: コマンドが見つかりません