tcdemux: 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/tcdemux - from package: transcode

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

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