iMovie doesn't load my .mkv movie file and I tried avidemux for Mac, but whenever I open it up, it freezes. I left it on overnight just to see if it was taking long, but it's still frozen in the morning (my Macbook Pro is from 2010). I tried converted the file with Handbrake, but the quality loss is noticeable after conversion and I'd like to keep the exact original quality. Is there any video editor I can buy that will allow me to?