Xbox One in PAL: 60hz, 50hz, Judder and Video Pass Through
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User of Xbox One in the UK are finding that watching Sports through their Xbox are finding out that the conversion from 50hz in PAL doesn't convert to 60hz so well in real-time.
Since Xbox runs at 60hz internally when 50hz content is played through the Xbox you see frame skips and drops called Judder.
Microsoft may be able to fix this with an update. Or not.