Hi, I have a problem concerning video converting. I have a 2012/2013 Imac i7 3,4 GHz, 24GB memory, 1TB fusion and gtx680mx. I convert a lot of MKV files to play it on my ipad 2, this is a 50 minutes show in 720P to ipad format. This takes about 18 minutes to convert 1 file (i've tried a few programs with almost same result). When i use my windows 7 in bootcamp the conversion takes 4 minutes (xilisoft hd converter), here al 8 virtual cores are being used while under osx 10.8.2 only 4 are being used and not even at 100%, 70%. Why is the conversion in OSX so inefficient and/or is there a better program that uses all 8 virtual cores and thus speeds up the conversion.