Best way to output two streams, and add lower thirds keying to one stream? We are looking to enhance our production with some lower thirds keying on our video.

We currently output a single HD stream and encode it in real time. This output doesn't have any keying because it's application requires it to NOT have this.

A new request that has come in is to have a separate recording that DOES have lower thirds keying for a couple of select applications.

We could add the keying in post production, however this is time consuming and we'd rather not.

I've attached a diagram of how our system is currently configured.

I'm wondering what the best way to add lower thirds keying would be if we're doing it in real time on a second stream... and is this possible with our current equipment list?





My thought on this would be to throw a Mac mini on the second preview output and use software to key the output of the Mac back into a second input card on the StreamZHD. 

I'm a little nervous in using the built in keying ability as it would require a single operator to be managing ALL of our production.
Much like your Mac Mini approach, you can set up a PC with a free demo of vMix (http://www.vmix.com.au) and see if it will work for you.