I'm trying to render video clips from a GoPro. The video always turns out jerky and flickering. The video looks fine on my computer before I edit it. I've been using WMM for a few years with an SD camcorder and that never has any problems. The GoPro video is 720p 60fps. I tried adjusting the frame rate and the bitrate without success. Tried using various methods to save the video and no luck, it's always jerky. Any ideas of how to fix this?