I promise this will be my last post here! I want this to be around for anyone else who runs into similar issues as myself, since these pages do end up in google searches.
So I found other users out there who had similar issues as myself, but none of the solutions ever solved my problem.
But now I have to say I have found a resolution that may work for those who have issues with aliasing and shimmering and flashing problems in live TV.
For me, it was due to DXVA de-interlacing. Took me forever to pinpoint, but playing with XBMC finally isolated it. If you use WMC, it appears that it uses DXVA hardware accelerated de-interlacing by default. You can't control de-interlacing config in WMC, so you're stuck with it. This causes shimmering and aliasing in some setups (I can't find a common link... seem to be more than just the specific video cards).
With xbmc, you have much more granular control over what decoding and filters are used.
I found this is the best setup, performance and PQ-wise -
Video Settings - Acceleration
Video settings inside the video player -
- Use Hardware Accelerated Decoding
- DXVA2 UNCHECKED. THIS IS IMPORTANT. If you leave it checked, your only option is DXVA de-interlacing. Without it checked, you can use other software-based de-interlacing.
- Deinterlace video - auto
- Deinterlace method - De-interlace. THIS IS ALSO IMPORTANT. If you set to "auto", or choose "DXVA Best" or "DXVA Bob", you WILL have problems. De-interlace apparently uses software-based de-interlacing, or some other non-DXVA-based de-interlacing.
- Scaling method - Lancoz3 (I don't notice much difference between the types honestly, at least for live TV PQ. You can leave this on auto or whatever you prefer, it doesn't impact performance much for me).
That's it. Aliasing is 100% gone. Moire is 90% gone. Shimmering is about 85% gone. Still see it during some slow pans and certain text, but it's not near as bad as it looks with DXVA de-interlacing, not even close. Definitely acceptable now.
OK, I'm done, unless anyone else has any other questions/comments. Hope my plight helps someone else out in the future that is struggling with poor Live TV PQ.