What would be the best software for me to use to do a windows media live stream. I have a CDN from softlayer and would like to start using this for live streaming. I own Expression Encoder but other people that I want to have use it do not.
I need the software to be able to send what I see on my computer screen with sound.
The solution you want is Windows Media Services. This consists of at least 1 2008 r2 server with the media serives role installed, and at least 1 client running an encoder (like expression encoder). You can certainly use the CDN for caching the live content if it is compatible with media services (a quick peek at the softlayer site didn't show anything about WMS so I'm not sure that it will be). As an example of one that is compatible see internap
Ah - ok, CDN is USELESS. Seriously. LIVE STREAMING means LIVE, no content to deliver to a CDN first. What you need is a server running media services. Plus media encoder on the capture computer, delivering the stream to the media services computer where clients pick it up. RTFM for media services.
Start at
http://technet.microsoft.com/de-at/library/bb629405(en-us).aspx