I haven't given ffbmc a try but with 5DtoRGB I get an error along the lines of "the DNxHD encoder could not start and 1440 frame size may not be supported". This is with an MTS file that is 1440x1080. On a side note, I tried 5DtoRGB with an .MOV file from my Canon Rebel T3i/600D and the conversion worked fine, however despite playing with