Hi. I've followed a guide on this site for using MkvMerge and Quicktime Pro to convert my 1080 movies into MP4 files for my PS3. http://forums.macrumors.com/showthread.php?t=622894 The problem is that when I try to convert my two .mka files into .mp4 files by exporting from Quicktime Pro it seems to be taking absolutely AGES. I've put them both into it and started the export using the settings specified and I've been gone 2 hours and they're not even an eighth of the way through the progress bar. Any ideas what's going wrong anyone???