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Export Render Pixels Over Highlights

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Jean Parisot
Export Render Pixels Over Highlights
on Jan 5, 2018 at 9:37:54 am

Hi everyone,

Beginner here. I'm using footage from iStock that I've purchased in AE, when I export to Media Encoder I am encountering a bizarre green pixelation issue around some of the brighter parts of the footage just inside the window frames (see below). The green pixels run around and flicker as the video plays.

When I import and render from Premier I do not have this issue with the same footage, so the issue is specific to AE as far as I can tell.



My AE render settings are:



Link to stock footage: https://www.istockphoto.com/video/businessman-giving-presentation-using-fli...

Would appreciate any insight from your experience!


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Walter Soyka
Re: Export Render Pixels Over Highlights
on Jan 5, 2018 at 3:34:14 pm

Are you applying any effects to the footage? If yes, what effects?

Walter Soyka
Designer & Mad Scientist at Keen Live [link]
Motion Graphics, Widescreen Events, Presentation Design, and Consulting
@keenlive [twitter]   |   RenderBreak [blog]   |   Profile [LinkedIn]


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Jean Parisot
Re: Export Render Pixels Over Highlights
on Jan 5, 2018 at 3:59:33 pm

Hi Walter,

I was applying a logo to track along the board room window, but then I opened a new project and just imported and exported the footage only without any effects or anything and the result was the same. Something seems to be happening with exporting this footage.


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Jeff Pulera
Re: Export Render Pixels Over Highlights
on Jan 5, 2018 at 4:07:55 pm

I'd guess it has to do with the blown whites/clipped highlights. Can you maybe bring the white levels down a bit?

Rather than going straight to .mp4, try exporting to a good intermediate codec like Cineform or DNxHD and see how it looks. If that works, then export that new clip to .mp4 and check results.

Thanks

Jeff Pulera
Safe Harbor Computers


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Jean Parisot
Re: Export Render Pixels Over Highlights
on Jan 6, 2018 at 3:33:32 pm

I'm not convinced its the highlights exactly (even though I hinted at the possibility in my thread subject). If you see the below screenshot, taken from a render using DNxHD the streaks still appear over areas that are not overexposed. I do find it hard to believe that overexposed would create these issues. Again, Premier had no problem rendering/exporting this footage but I need to track a logo on the window in AE.



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