Nikon Digital SLRs like D3100, D3200, D5100 combine the latest in technology with ease of use to produce incredible digital images and videos. Recording your ideas or memory into HD videos with a Nikon D-SLR, you may also want to edit the Nikon videos in iMovie. But you may encounter some problems when you want to import Nikon D3100/D3200/D5100 footages to iMovie for editing, like import it slowly, and couldn't edit videos smoothly.
As far as I know, the reason behind that is Full HD "MOV" movie files created by Nikon DSLRs use the H.264 codec for the video. Generally, mov is friendly for iMovie, however, H.264 is a delivery codec rather than editing codec. So how to import and load video clips from Nikon D3100/D3200/D5100 to iMovie for smoothly editing on Mac? The best method to solve those problems is to encode those Nikon h.264 mov footages to iMovie native format, for instance, Apple Intermediate Codec(AIC) codec. The following passage guides you how to transcode Nikon D3100/D3200/D5100 h.264 mov footages to AIC encoded MOV file for iMovie.
If you looking for a solution for this problem likewise, check out Pavtube's HD Video Converter for Mac(currently on sale), a top Nikon H.264 MOV converter for iMovie. It supports not only encoding all Nikon h.264 mov files to AIC so that you can easily import them to iMovie for smoothly editing, but also supports transcoding all Nikon H.264 mov footages to Apple ProRes for Final Cut Pro 6/7 or FCP X editing. This will help you import the file correctly and saving the rendering time.