I am having trouble in FCP, specifically right now, with my GoPro HD Hero camera. I have watched so many workflows on GoPro slow motion, yet I am still having problems. I want to have a smooth slow motion with my clips, but ramped.(Ramped meaning a normal speed clip, but progressively gets slower quickly during the trick.) The reason i would like a smooth ramped slow motion is because i am in the process of editing a skateboard video. It just becomes very blurry, and tends to skip frequently. Can anyone help me out? Any suggestions would help, specifically GoPro settings for FCP, and an in-depth "how-to" on achieving my desired effect. If any know how to ramp smoothly ramp slow motion with A DSLR, it would help a ton as I have both a DSLR and GoPro, and they are also very similar.
In order to have really good slow motion make sure you have a lot of light, this way you can keep the shutter open as wide as possible which reduces motion blur.
You also need to shoot at a very high frame rate, Go Pro's highest frame rate is 60fps I think. Bring the 60fps clip into Cinema Tools and conform it to 24fps, this will slow it down to less than half speed. After that, bring it into Final Cut and you can apply any speed changes to it that you'd like.
I think GoPro shoots H.264 - have you converted to ProRes for starters?
You describe that "it just becomes blurry and tends to skip frequently." This simply sounds like unrendered video and unlimited RT to me. After you make your speed change what colour is the render bar above the clip? Bright green? Orange? If it is either of these colours you need to render. Hit butterfly+R or option+R.