Any time I do color correction or color grading (only slight adjustments), my footage appears to be very grainy/"pixelated." Has anyone else encountered this issue?
Can you provide a screen capture of the video you're trying to color correct -- and another of what it looks like after?
You can only improve an image so much -- especially a very dark image -- before it starts to get ugly blotches.
I can see some graininess -- but the results actually look pretty good to me.
That said, have you tried adjustments with any othe Adjustments than Gamma? You might well get different results - and without the graininess.
Yes, I have tried all sorts of adjustments. Gamma adjustments result in the least amount of image distortion.
I'm sorry. I don't have a solution for you. Some adjustments are going to reduce or increase contrast between pixels, which can result in a picture that's not as sharp as the original.
Although, usually, there's one Adjustment that does less of this on a given clip than another.
BTW, have you tried outputting your movie yet as say an AVCHD?
Since you're working in hi-def, it's possible the render you're viewing in your playback is not a true representation of what a finished hi-def output will look like.