TV3 is unusual from all other HD channels in NZ because it broadcasts in 1080i, all the others are 720p.
This may be why it is displaying differently, i would suspect your codec would be a good place to start. I see you're using Coreavc either check its settings or alternatively download the trial of Powerdvd8 and use that as your H264 codec instead and see if it makes a differece. |