Deinterlace/stutter issue on CBS HD
Been using Sage for a long time now with my HDTV setup. I use NVidia Purevideo and haven't had problems with playback at all, until:
A couple of weeks ago, CBS recordings (CSI, etc) started having a "cyclic" stutter issue. Older recordings didn't have this problem. After lots of experimentation, it seems that the video is not being properly deinterlaced.
Nothing else changed (driver versions, etc) so I am at a bit of a loss. Other networks (NBC, FOX) are fine, so it's not a 1080 issue (as far as my hardware goes). We don't watch any ABC shows so I don't know if ABC is a problem too. I've tried using different decoders, but they all have the same issue.
I can tell it's an interlacing issue because the CBS transparent logo "shimmers" on the newer recordings and not on the older (< two weeks or so) ones. It's hard to explain. And the "stuttering" comes in an exact rhythm, so it's not a typical stutter issue.
My hardware is all good, and again I'm using NVidia PureVideo. Works great on everything except CBS, and only recently has CBS been a problem.
Any ideas as to what could be causing this?