Corner Pin problem in Premiere Pro

[Andrei Popica]

I have a problem in premiere pro, with corner pin. After aplying, it makes some black lines.

[Jon.M.]

Yes, I had the same. No issue in 24.0 only showed up for me in 24.1

Hey, I just did some playing around and found a work-a-round in v24.1 if one prefers not to go back a version or to beta.

I put the invert effect before and after the corner pin effect, lines are gone. Not elegant, yet my day can progress... 🙂

[drkmedak61150962]

Can confirm that a downgrade vom 24.1 to 24.0.3 fixes the problem with the corner pin effect. (Win11, RX6600, AMD processor) 

[Alisdecookie]

Like someone else I couldn't get this to work in 24.1. I downgraded to 24.0 and still having problems (lines in a corner pin that should easily be resolvable). But as someone suggested, putting an invert effect before and after the corner pin in the effects panel solves the issue.

[Alisdecookie]

Rendering under Media Encoder is showing same issue despite using the invert effect where in-place rendering looks OK now.

[Alisdecookie]

Downgraded to ME 24.0.3 and problem solved.

[Ann Bens]

Looks like a bug.

https://community.adobe.com/t5/premiere-pro-bugs/lines-when-using-corner-pin-effect/idi-p/14289579

[tomSDN14713793]

Apparently when I have a clip with the Corner Pin Effect applied I get striation patterns appearing on my image. I never had this problem with previous versios of Premiere. Is there a way to circumvent this? I hope this gets fixed soon. 

[jane-e]

@tomSDN14713793 

I've moved your post to the Premiere Pro forum for you.

Jane

[Ann Bens]

Known bug: revert to previous version or use the beta.

[PiotrBurz]

Hey,
I have a problem with Premiere Pro showing lines-artifacts when using Corner Pin in a way that program
Task:

• General idea is to a add video to a mockup of smartphone.
• It requires cropping of a video which is recorded in 1920x1080;
• It requires placing cropped video on a mockup;

My way of dealing with it:

1. Adding cropping effect and cropping it + creating mask on opacity to round the corners.
   2. Using rotation, position and scale to roughly place video in the right spot.
2. Creating nest (*)
   3.  Adding corner pin effect and dragging points so it would fit the smartphone perfectly.
   (*) nest is applied to get corners of pin effect closer to the area that actually must be visible

Problem  - although it is the easiest way to to this it creates visual artifacts (lines) when perspective is pushed beyond what program thinks is acceptable, even though the perspective looks natural.
I had no such problems with other mockups (usually, artifacts appeared only when perspective was weird) but this one seems problematic for PP.

My solution (terrible one) - avoid corner pin and using Basic 3D & Transform. Way less accurate and way more time consuming.

I guess, I'm doing something wrong but it must be something obvious since I see no topics related to this issue.

I'm attaching video with visible artifacts + file of PP (with video clip and mockup) where one clip is created using corner pin and second one using transform and basic 3d.

[Michael Grenadier]

just a quick thought.  Are you using any source material that's interlaced?   

[PiotrBurz]

Not sure what you mean by interlaced (?). My source material is a video recorded by OBS capturing screen.
BTW, I checked out now Beta version and seems like the problem is solved there. I tried to figure out what's wrong for 2 hours and looks like it was a bug...

[Michael Grenadier]

Interlacing means that each frame of video is made up of 2 fields... and in my opinion, is a legacy format that should be avoided at all costs, bwdik...  Some delivery specs require it and some shooting formats allow for it.  Happy to go in details, but since you're not dealing with it, probably not necessary.     

[Ann Bens]

If you mean these kind of lines its a know bug

revert to previous version or use the beta.

[Michał24985249o2fq]

Same problem. Please fix it asap!

[Ann Bens · Accepted solution]

It has been fixed: 24.2.1. or use beta.

[Austin R]

use the Basic 3D effect as well for an easy work around

[FliBYy]

(Sorry, i don't know English well, but i think you will understand me)
Maybe I have one of the best alternative: 
1. Create mask where you need
2. Add Transform and basic 3D
3. Change parameters (include skew and skew axis in transform)

This way I did what I wanted to do

P. S. 
Of course this is harder but it work for good result 

[Michał24985249o2fq]

Hello, Your method works quite well, thanks! The problem can be also fixed by updating Premiere Pro to the latest version. 

[Clementp]

Bonjour,

j'ai un probleme avec l'effet "quatre coin" sur les elements que je deforme (image ou video), cela crée des lignes grises qui suivent la deformation.

Exemple sur tout les elements animé de cette vidéo https://youtu.be/AUD1zooX704?si=vju_aeUUTLMc_neT

1:18mn video
0:20mn photo

Version 24.1.0 (build 85)

merci de votre aide

[Clementp]

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