streamplayer: 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

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/sbin/streamplayer - from package: asterisk

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