Wirecast is a great program for broadcasting in SD or HD, and is capable of multi bit rate broadcasting as using single or multiple camera setups. Wirecast has some great video overlay options and other features which help produce a very professional broadcast.
The first step to use Wirecast is to go to the Wirecast download page to download and install Wirecast. This can be found in the Sunday Streams Manager by clicking Mac Encoders > Wirecast > Download. Once installed, you can get started quickly with the Quick Setup settings. Additional setup details are covered in the short help video below.
Wirecast Setup Help Video