media player
 

Im looking for a media player that can emulate a camera.
In a way that i could select it as a camera in other apps?
any ideas

Maybe this can help you:
http://freshmeat.net/projects/vloopback

It will create a v4l dummy device, that gets it input from a user stream and so it can be used to fake a camera :)

I found and installed
dkms-vloopback - Video4Linux Loopback Device​
from the packagemanager.
can i use it with vlc?
what would the comand be? to get it to work and how if not in the start up command might i get it to pose as /dev/video3 or similar
vlc -vloopback [input vloopback device] -device [real video device]:

http://v4l2vd.sourceforge.net/ is a newer version of the above project (On my linux-2.6.32 I had to modify the source code to compile the driver, if you have problems I can send you the modified source code). In principle any application that is capable of playing a video on a v4l2 output device is usable for a video source. The project provides a sample program that provides a raw video stream on the other end of the video pipe.