Hi,there. I have been in use of Pavtube HD video converter for Mac to transcode my camcorder files, unlike yours, my camcorder shot footages in the format of MTS, but the converted files can be directly recognize by my iMovie. ( I often convert these MTS files into MP4 or MOV). I'm not quite sure if it can solve your problem, but sugguest you have a try about its trial version, in that case you can see wether it can solve your problem or not. Good luck!