somehelp with starting my camera

Hi im all new to this and i need some guidance/help with something. im using a camera and i can started without ros by typing this in the command line : `gst-launch-1.0 udpsrc port=5008 ! application/x-rtp, payload=96 ! rtph264depay ! avdec_h264 ! autovideosink` . 
how to put all of this information a launch file ? and which launch file do i use since there are many.

Thanks
