I've seen many comments on the forum about how wonderfully well PD handles 4K. This is not my experience: every time I render a video in which I used a 4K source clip, no matter what resolution I render at (tried 1080 and 4K), I get some blocky artefacts and pixelation in portions of the screen.
My source clip is 4K from a Phantom 3 drone, in Mp4 format and it looks beautiful on media player. It's the rendered product which is not stable.
I've upgrade from PD13 to 14; I've upgraded my video card, I've down-converted my 4K video to 1080, and I still get the same results. I've ensured the project frame rate is 24fps.
I don't know what else to do. I hope someone has come across, and resolved this.
Help? please?