See all the Camtasia Tips
I switched to producing my Camtasia videos in HD format using an mp4 encoding. I noticed they got a little bit slower and no longer seemed to be using multiple CPUs. Previously I was rendering at 1024X768 in WMV. I tried multiple experiments, including read/writing from an SSD (surprisingly little improvement) to try and improve the render speed. I also reran some tests using the WMV encoding. The one consistent, albeit small, improvement I got came from turning off the GPU acceleration. You can do this under the Tools->Options… menu.
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