[William Childress]

I was getting the exact same error with an ATI Radeon 5770 video card. I noticed that the 11.2 drivers were mentioned on the Sony website. They said anything above a certain driver, but I had a hunch and decided to try it. I had loaded the latest driver version 11.11 and GPU accelleration for the MainConcept encoder was a no go. I downloaded the 11.2 drivers and did a custom uninstall related to the OpenCL SDK. I then I did a custom install for the same SDK from 11.2 instead of 11.11. It worked and started encoding immediately without the error. There are issues with the current drivers that still need to be resolved.