ts_filter: 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/ts_filter - from package: dvbstream

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

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