Raspivid - streaming

Netcat (nc) seems to be the one with the smallest delay.
In my experience, VLC has the biggest delay. On the other hand, there is a VLC client for Android, which is convenient.
<IP-OF-THE-CLIENT> is the IP of the computer that should receive the video stream.
<IP-OF-THE-RPI> is the IP of the Raspberry Pi.

Using Netcat:

On the client

(Run the command on the client first, and then on the server (RPi)).

Linux

nc -l 2222 | mplayer -fps 200 -demuxer h264es -

OS X

nc -l 2222 | mplayer -fps 200 -demuxer h264es -

On the RPi

/opt/vc/bin/raspivid -t 0 -w 300 -h 300 -hf -fps 20 -o - | nc <IP-OF-THE-CLIENT> 2222

Using GStreamer:

On the client

Linux

gst-launch-1.0 -v tcpclientsrc host=<IP-OF-THE-RPI> port=5000  ! gdpdepay !  rtph264depay ! avdec_h264 ! videoconvert ! autovideosink sync=false

OS X

gst-launch-1.0 -v tcpclientsrc host=<IP-OF-THE-RPI> port=5000  ! gdpdepay !  rtph264depay ! avdec_h264 ! videoconvert ! osxvideosink sync=false

On the RPi

/opt/vc/bin/raspivid -t 0 -hf -fps 20 -w 300 -h 300 -o - | gst-launch-1.0 fdsrc ! h264parse ! rtph264pay config-interval=1 pt=96 ! gdppay ! tcpserversink host=<IP-OF-THE-RPI> port=5000

Using VLC

On the client

The client might even be on a mobile phone (I tried on Android).

Simply open from the network in the VLC client:

http://<IP-OF-THE-RPI>:8090

On the RPi

/opt/vc/bin/raspivid -o - -t 0 -hf -w 640 -h 360 -fps 25|cvlc -vvv stream:///dev/stdin --sout '#standard{access=http,mux=ts,dst=:8090}' :demux=h264