After a bit of snooping around I figured it wasn’t the converting, I noticed the .mts is still being used, which I assume is virtually the same as avchd. I also realize the preview is just a preview, but even when I rendered the clip in sony vegas, no effects or anything, on pretty high rendering settings I think, I put the two clips side by side (the original and rendered version) and, though it was hard to spot at first, there was an difference in quality/frame rate. I used both the basic windows player to play it and VLC media player, both showed the same difference. My original, though the shot in and of itself is very shaky/fast at times looked very constant, while the rendered version didnt look as fluid, which I am assuming is from a loss of frames(?).