Pixelation of red graphics during export

New Here ,
Jan 30, 2017 Jan 30, 2017

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Hi,
I just encountered a strange effect that gives me a lot of headaches in the middle of a deadline. I've never seen this before:

I have a sequence with some graphics, and some of them have red in them. In the preview and in screenshots / single png frames, everything looks perfect, but when rendering, the exported clip has this strange pixelation at the red areas (see screenshot below: left is a single frame exported / right is screenshot from the exported sequence).


This happens when exporting in different compressed filetypes such as mp4, wmv etc. However it does NOT happen when exporting a large quicktime file. But when I recode it in Media Encoder, the problem returns.

I have documented this on two different workstations both running CC 2017.

the logo files are pngs, but the effect still happens when I save them as jpgs and place them into the sequence. Size of the logo does not matter, the only way to keep away the pixelation is if I use some other color than this red.

What kind of witchcraft is this? Can you help me? Thanks!

Dropbox - zzz_frame_red_pixelation.png

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LEGEND ,
Jan 30, 2017 Jan 30, 2017

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Check your export settings.  Do they match the sequence settings?

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New Here ,
Jan 30, 2017 Jan 30, 2017

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Yes, they do! And everything else is pixel perfect and fine.

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LEGEND ,
Jan 30, 2017 Jan 30, 2017

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OK.

What are the export settings?

Is that red section part of the letter itself, or a fill added separately?

What are the dimensions of the logo?  Is it being used at 100% in the sequence?

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New Here ,
Jan 30, 2017 Jan 30, 2017

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My standard export for this sequence would be H.264, 1920x1080 (1,0), 29,97 fps, Progressive, VBR 1 Pass, Target 10,00 Mbps, Max 12 Mbps... I also tried different settings (incl. maximum Mbps), it just works when the video is uncompressed (mov).

The red part is part of the .png logo / typo. It's part of the raster logo. The logo is downscaled in the final sequence, but for testing purpose, I exported variations of the logo and placed them at different scales and also 100 %. The same effect occured.

Also we tried it on two different workstations and this must be our 220th video using this same workflow. This has never happened before.

My solution would be simple (and I tried it): change the color of the "red hole". But as it's the customers CI, I guess that is not an option. And I have to find out why this is happening.

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LEGEND ,
Jan 30, 2017 Jan 30, 2017

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sebastiank95713004 wrote:

My standard export for this sequence would be H.264, 1920x1080 (1,0), 29,97 fps, Progressive, VBR 1 Pass, Target 10,00 Mbps, Max 12 Mbps...

I would expect some artifacts, such as what you are reporting, from an export to those settings - but just to verify, do you have the check box for Use Maximum Render Quality checked? It has some impact, particularly when re-sizing is involved.

This has never happened before.

You've used this same logo, in the same way, exported to the same format previously without these artifacts showing?

MtD

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LEGEND ,
Jan 30, 2017 Jan 30, 2017

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Also, how are you viewing the exported file?

If you import the exported file back into Premiere and view it there, do the same artifacts persist?

MtD

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New Here ,
Jan 30, 2017 Jan 30, 2017

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Hi and thanks.
Yes, the checkbox for Maximum Render Quality is checked.

You've used this same logo, in the same way, exported to the same format previously without these artifacts showing?

no, I used the same sequences, export settings with many other graphics, but this particular logo is the first one that looks this strange.

Also, how are you viewing the exported file?

I've viewed it with vlc, with QT and Windows Media Player.

If you import the exported file back into Premiere and view it there, do the same artifacts persist?

Yes.

I could upload the Premiere Pro Project file, if you'd like. It's only about 150 MBs.

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LEGEND ,
Jan 30, 2017 Jan 30, 2017

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Actually, can you upload the .png file for public download?

Earlier you said:

My standard export for this sequence would be H.264, 1920x1080 (1,0), 29,97 fps, Progressive, VBR 1 Pass, Target 10,00 Mbps, Max 12 Mbps...

but in answer to Jim_Simon's question, you said you said the export settings match the sequence settings. Is this correct? Is

H.264, 1920x1080 (1,0), 29,97 fps

your sequence setting?

MtD

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LEGEND ,
Jan 30, 2017 Jan 30, 2017

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the checkbox for Maximum Render Quality is checked.

You should uncheck that if you have GPU acceleration turned on.  The factors this setting handle are already handled by the GPU (and often better).

Unfortunately, I don't have any specific ideas about what's causing this.  You might try exporting the Uncompressed version, and transcoding that.

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New Here ,
Jan 30, 2017 Jan 30, 2017

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Hi and thanks for your replies.

Is H.264, 1920x1080 (1,0), 29,97 fps your sequence setting?

yes, that's right.

You should uncheck that if you have GPU acceleration turned on. The factors this setting handle are already handled by the GPU (and often better).

Unfortunately, I don't have any specific ideas about what's causing this. You might try exporting the Uncompressed version, and transcoding that.

Yes, I've tried that, but once transcode it, the problem is back. It is very strange.

This is the logo file:

https://www.dropbox.com/s/ypqs8ir1ttxvd9o/johnen_allgemein_4C.png?dl=0

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LEGEND ,
Jan 30, 2017 Jan 30, 2017

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This may not be helpful, but I can't replicate your issue on my system (Mac based).

I downloaded the posted logo, dropped it on the timeline over a white bg and resized it for TV safe, then exported at your settings.

I viewed the resultant exported file in QuickTime X, and compared with the downloaded file in Photoshop and do not see the level of artifact you see:

LogoTest.png

Maybe someone else has a suggestion.

MtD

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New Here ,
Jan 30, 2017 Jan 30, 2017

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Thanks for your help! Yes, that's the way it should work and look. It's so strange. We tried it on two Windows HP workstations and see that pixelation problems on both of them (using different sequences / project files for testing and trouble shooting). Maybe someone else can replicate the problem...

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Community Beginner ,
Mar 23, 2018 Mar 23, 2018

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Dude, I have the same problem, have you solved it? thanks in adance

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New Here ,
May 08, 2018 May 08, 2018

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Hi everyone, no, this has never been resolved. I was lucky the customer wasn't too picky but I still have nightmares about the next project with this problem.

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LEGEND ,
Jan 30, 2017 Jan 30, 2017

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Where is the chroma of that RED sitting on vectorscope and RGB Parades?

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LEGEND ,
Jan 30, 2017 Jan 30, 2017

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shooternz wrote:

Where is the chroma of that RED sitting on vectorscope and RGB Parades?

On the logo I downloaded, it is within safe.

MtD

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New Here ,
Apr 01, 2018 Apr 01, 2018

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Also having this issue! It's crazy.

I have a png, which is solid black artwork on a white background. This png is multiplied over 2 colored backgrounds — one blue and one red. The colored backgrounds each wipe in at different moments during the sequence. No matter what format, render max quality, etc. the black artwork is always pixelated when sitting over the red. It looks perfect over the blue. Driving me bonkas.

FYI, I'm using CC2018 and have tried exports using AE and AME. The quality is perfect, regardless on background color, when viewed inside AE.

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Community Beginner ,
Apr 22, 2018 Apr 22, 2018

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Same issue here

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New Here ,
May 22, 2018 May 22, 2018

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Same problem here... please please let me know how to resolve this issue! Only problem is with reds, everything else looks great!

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Participant ,
Jul 29, 2018 Jul 29, 2018

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Any solutions on this? thanks!

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Explorer ,
Jul 30, 2018 Jul 30, 2018

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Having the very same problem with a Red logo

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Adobe Community Professional ,
Jul 30, 2018 Jul 30, 2018

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PNG as well? If yes, try PSD instead.

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Adobe Community Professional ,
Jul 30, 2018 Jul 30, 2018

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Check your vector scope and see if its not oversaturated.

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Explorer ,
Jul 31, 2018 Jul 31, 2018

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PNG and PSD yield the same result. If I change the color to white it exports just fine.

this is how it looks after export, notice the aliasing:

Bildschirmfoto 2018-07-31 um 11.38.46.png

The scopes look fine to me, or am I overlooking something? Red level is 227, so not full red and there is also some blue and green in the logo, so it is not pure red.

Bildschirmfoto 2018-07-31 um 11.39.22.png

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