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Alpha incorrect in Premiere, but correct in After Effects
I have some graphics created in After Effects, with the Glow effect applied to it, then exported as a TIFF sequence with Alpha.
However, when I import this image sequence into Premiere and attempt to composite it over video footage, the graphics look slightly different from the original. It’s as if the Glow effect becomes more “solid”, while the original correct Glow fades off over distance (hope this makes sense).
I figured it’s an Alpha issue, so I’ve tried to re-interpret the image sequence’s alpha from Straight to Pre-multiplied, but that makes it worse.
Strangely enough, the very same image sequence works beautifully when I composite it in After Effects on Straight Alpha.
Does anybody have any clue on how to get the alpha to work correctly in Premiere?
I’m on CC 2015, by the way.
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6 Replies
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Are you using a linearized workspace in Ae? If so, that might be the cause of your problem. See here for an explanation and a solution:
https://forums.creativecow.net/thread/2/1052523
Simon Ubsdell
tokyo productions
hawaiki -
Hm, no I don’t believe I’m working in linear space in AE. My Project Settings in indicate that Color Management is off.
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I seemed to have fixed it, but I have no idea how this worked.
What I did:
1) In Premiere, duplicated the graphics clip and put it on another track.
2) Disabled the duplicate track.
3) On the original clip, added a Set Matte effect. Set the matte layer to the duplicate clip.
4) Also on the Set Matte effect, made sure Composite Matte with Original was checked.Any idea why this worked?
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either export premultiplied tif or in premiere uncheck this option
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I have a similar issue but in reverse using DL.
Just a simple black gradient at the bottom of a 9:16 video.
In AE it looks awesome and smooth but in Premiere, you would need to push it to the extreme (AE) for you to see the smoothness.
Then at a certain point, the gradient is gone and you’re left with a stupid black bar.
Doesn’t like the mask in AE I guess.
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I had a similar issue and realized that my AE project was at a color depth of 16 bpc. I switched back to 8 bpc (at the bottom of the Project panel), exported the asset again (Premultiplied) and problem solved.
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