qm2ts: 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 CentOS possible default full paths are:

/usr/lib64/qt-3.3/bin/qm2ts - from package: qt3-devel
/usr/lib/qt-3.3/bin/qm2ts - from package: qt3-devel

You may install the required package with command yum install {package}

Error in other languages:
qm2ts: bevel nie gevind nie
qm2ts: comandă negăsită
qm2ts: comando não encontrado
qm2ts: commande introuvable
qm2ts: command not found
qm2ts: käsku ei ole
qm2ts: không tìm thấy lệnh
qm2ts: komanda nerasta
qm2ts: Kommando nicht gefunden.
qm2ts: kommandot finns inte
qm2ts: komut yok
qm2ts: nie znaleziono polecenia
qm2ts: níor aimsíodh an t-ordú
qm2ts: no se encontró la orden
qm2ts: no s'ha trobat l'ordre
qm2ts: opdracht niet gevonden
qm2ts: parancs nem található
qm2ts: perintah tidak ditemukan
qm2ts: príkaz nenájdený
qm2ts: příkaz nenalezen
qm2ts: команда не найдена
qm2ts: командата не е открита
qm2ts: 命令找不到
qm2ts: コマンドが見つかりません