But then again the A5X is driving a 2048x1536 display not to mention the power consumed by the display itself. Its hardly comparable to ANY smartphone out on the market. And please remember that the iPad and iPhone do not have the ability to playback your pirate MKV files, so yes, it WILL be a 3rd party app software issue.
Why does it have to pirated, I always convert all of my DVD and BlueRay discs to DIVX and or MKV. Well I also do it to the stuff that we rent so I guess that's a little dodgy. I us a Android Tablet though for my media as they play pretty much every codec available and it's wide screened. I hate, hate converting media files to my iPad so I use another tablet just for media that you don't need to, plus I love DLNA.