I have a Win7 PC with DVB-T tuner cards in it that I have installed NextPVR on. Channel scan worked fine and EPG is populated but when I try to play live TV I am seeing very choppy and incomplete frames. I have tried various decoders but no difference. I don't have this problem on the same PC when I use Mediaportal software instead of NextPVR. I am guessing it is a decoder issue. Which decoder(s) is recommended for DVB-T Freeview NZ?