stream_pixels: 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/lib/cmtk/bin/stream_pixels - from package: cmtk

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

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