If you are using Gemni image then open the web interface for your dreambox. There i saw an option on the top i think it said View Current Strem. click it. It should start VLC and u will be able to view the current channel in PC.
to open the webinterface of your dreambox type as follows.
Open Internet Explorere and then type this address for your dreambox.
e.g. if your dreambox ip is 192.168.0.2 then type this