Hi and welcome nilund.
Im currently testing gstreamer1.4, just to see if i can get better perfomance.
You can install gstreamer1.0 with the following syntax.
sudo apt-get install gstreamer1.0
Then try to use this pipeline(You need to define your destination ip.) and revert with the outcome.
gst-launch-1.0 -v -e v4l2src device=/dev/video0 ! video/x-h264,width=640,height=480,framerate=30/1 !
tee name=t ! queue ! rtph264pay pt=96 config-interval=1 ! udpsink host= port=5000
I belive you tried gStreamer.sh from my blog? correct?
Did you alter something in that file?
gstreamer is quite sensitive to pipeline elements, and one wrong character will or can destroy the streaming.
I can test this file tonight, just to verify.