1. Download Camtasia
2. When you're installing Camtasia be sure to select live output.
3. Once it's installed open Camtasia Recorder.
4. Goto File > Input and select what you want to broadcast.
5. Goto File > Output and select Live.
6. Click record to start recording.
7. Set up nsvenc as shown here
8. In the same folder nsvenc is in run this:
nsvenc /cfgcap cap:2,N sc:127.0.0.1:8001:headers.txt
Change the 2 in cap:2,N to which ever number Camtasia is. (In my case it was 2 because my tv card was 0 and my webcam was 1).
9. Start encoding and test it!