I have a JVC Everio HD300 (AVCHD) camcorder,i am annoyed with the MTS files, for they counldn't be edit on FCP but now i found out a fastest and easiest way to solve it-just use a professional HD Video converter which can convert MTS/TOD/MOD to wmv, mov, mp4, avi, etc. without any problem.The software seems to do a decent job. I've had good results converting the .mts files to .mov, with the settings h.264, 1200, 1280*720, 25fps, aac. Comparing with other converters, I prefer Pavtube one because of its fast conversion speed and its pretty good output video and audio whcih satisfy me.
How to convert MTS to MOV for editing on FCP