On a linux server
gst-launch-0.10 v4l2src device=/dev/video0 ! videoscale ! video/x-raw-yuv,width=640,height=480 ! ffmpegcolorspace ! jpegenc ! tcpserversink port=5000
On an OSX client
gst-launch-1.0 tcpclientsrc host=x.x.x.x port=5000 ! jpegdec ! videoconvert! osxvideosink