EOS R5 - Weird Artifacts in Video Footage

Flyingskiguy

I'm New Here
Dec 31, 2014
24
40
shot some 4k120 video at the beach and noticed the strange pixelated artifacts in the wave crests. Anybody know what's going on here?

artifact_1.1.1.jpg


artifact_1.1.1 2.jpg
 

jprusa

EOS RP
CR Pro
Apr 29, 2013
545
396
It looks light reflection off of the water from the sun and I see it in the cloud also. Did you have a filter on you lens?
 

Flyingskiguy

I'm New Here
Dec 31, 2014
24
40
Hi All,

Thanks for the responses. Here’s more info.

The first image is a still pulled from the color module in Davinci Resolve, and the second is a crop of that image showing the issue.

Video info: 10bit 422 HEVC internal, Clog3, Rec2020 color space, 4k120, iso 800

The artifacts appear in other clips of the same scene, but do not appear in 8K RAW footage of the same scene. Is pixel binning in the 4k120 mode to blame? I've shot that mode a lot in the past, and never noticed an issue.

Even if it is a reflection, it shouldn’t appear that way. It doesn’t look like a clipped highlight at all. And it’s not an issue with resolve, as it shows in premiere as well.

I’m going to conduct some tests back home to see if I can replicate this issue.
 
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