I have lip sync issues with TataSky on my C7 while the inbuilt apps for Amazon Prime and Netflix works fine. Yet to test a movie on my Oppo so can't say for the UDP player.
I have plugged TataSky directly into the TV as well as have tried routing it via UDP 203. The sync issue persists.
Anyone else have the issues and if yes, how to fix it? I am playing using TV's speakers.
you tried a different hdmi cable? worth a try also trying doing a factory reset on the tatasky stb, you got he 4k or hd stb?
Cheers.