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Chris29019178njis
Participant
March 22, 2023

Green Lines Show Up After Rendering Object

  • March 22, 2023
  • 1 reply
  • 383 views

Hey everyone, 

Hope all is well. Thank you for taking the time out of your day to read this.

I'm having a very particular problem. Ive been importing objects in and out of AE and into Preimere. Suddenly after reopening the premiere project (that was closed for 15 minutes) that has one of my objects in it, it now comes with a green line all around almost like a stroke of some sort. I thought it was some sort of corruption so I re-rendered out but now it happens everytime! No matter the object in the preview theres no green line, then when rendered or brought into another application there it is. Now it even happens to the exported video with no other application. This wasnt happening less than a couple hours ago. 

 

The only thing I've been changing is Video Coden from Apple prores 422 to Animation or Apple ProRes 4444. 

 

Attached are some screenshots of what I'm talking about even looks like. Would appreciate the help! 

 

 

1 reply

Thaumar
Thaumar
Inspiring
March 23, 2023

Hi, I think the problem is the background color of your comp and the output settings. I think the comps background color is set to green, it will explain the green color line in the partly transparent pixels at the edges. 
When rendering to a codec with alpha support you will have to select if you want to use straight or pre-multiplied alpha. When using pre-multiplied alpha the RGB will pre multiply partly transparant pixels with the comps background color, in this case green. 
Set it to straight alpha and the RGB will be clean. 

Or change the comps background color to black, and the pixels will be pre-multiplied with black.

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