I downloaded Bandicam 1.9.2 just an hour or two ago and i enabled IQS via Nvidia Optimus. But when i hit the record button in a game, it gave me an error sound, so i alt-tabbed back to desktop. I was greeted with a window saying "Failed to initialize codec". I tweaked with my settings a bit but it didn't help. I tried rebooting my laptop but it was no help either. However, i can record with CUDA aceleration without any problems. Seems like it only occurs with IQS.
What could be wrong?