I'm having very weird, inconsistent lag when I attempt to record minecraft. At one point I'll be happily recording at 60FPS, second time I try it goes down to 20 FPS, stop and start again, 60FPS. What's weird is that the first time I attempted to record and thought it was recording fine, turns out it lags every 5 or so seconds.
Here's an example, compare the first 4 minutes with the last 6 minutes, both were recorded with Bandicam and then rendered in Sony Vegas.
http://www.youtube.com/watch?v=MeT1wpHzq-0
I am using Bandicam Version: 1.7.8.196
CPU: i5 2300 @ 2.8GHz
GPU: MSI HD RADEON 6970
Minecraft Version 1.2.5