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Color overlap/bleeding issue when rendering MP4

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James Maloney
Color overlap/bleeding issue when rendering MP4
on Nov 16, 2016 at 11:20:06 pm

I'm rendering a test project with 4 solids stacked next to each other, of different colors. If I render it as a .mov, or .avi, or most formats, it looks normal. However, when I render it as an .mp4 (which I need to do), and bring in the exported file back to After Effects, and zoom in all the way, the borders between the colored solids are pixelated and blend over to each other by what seems to be an even 1px all around.

I've tried many combinations of export settings, but to no avail. Any help would be greatly appreciated - thanks!


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Dave LaRonde
Re: Color overlap/bleeding issue when rendering MP4
on Nov 17, 2016 at 3:20:15 am

Exactly how are you making the mp4? Please describe.

Dave LaRonde
Promotion Producer
KGAN (CBS) & KFXA (Fox) Cedar Rapids, IA


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Walter Soyka
Re: Color overlap/bleeding issue when rendering MP4
on Nov 17, 2016 at 2:31:41 pm

H.264 uses chroma subsampling [link] as part of its compression. This means that there is less color information store in the file than there is brightness information. Some artifacts (like bleed or jagged lines) are unfortunately unavoidable.

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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