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Pixelation of red graphics during export

New Here ,
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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Pixelation of red graphics during export

New Here ,
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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Jan 30, 2017 0
LEGEND ,
Jan 30, 2017

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

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Jan 30, 2017 0
New Here ,
Jan 30, 2017

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

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Jan 30, 2017 0
LEGEND ,
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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Jan 30, 2017 0
New Here ,
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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Jan 30, 2017 0
Adobe Community Professional ,
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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Jan 30, 2017 0
Adobe Community Professional ,
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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Jan 30, 2017 0
New Here ,
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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Jan 30, 2017 0
Adobe Community Professional ,
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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Jan 30, 2017 0
LEGEND ,
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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Jan 30, 2017 0
New Here ,
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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Jan 30, 2017 0
Adobe Community Professional ,
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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Jan 30, 2017 0
New Here ,
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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Jan 30, 2017 0
Community Beginner ,
Mar 23, 2018

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

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Mar 23, 2018 1
New Here ,
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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May 08, 2018 0
LEGEND ,
Jan 30, 2017

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

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Jan 30, 2017 0
Adobe Community Professional ,
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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Jan 30, 2017 0
New Here ,
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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Apr 01, 2018 0
Community Beginner ,
Apr 22, 2018

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Same issue here

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Apr 22, 2018 0
New Here ,
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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May 22, 2018 0
Participant ,
Jul 29, 2018

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Any solutions on this? thanks!

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Jul 29, 2018 0
Explorer ,
Jul 30, 2018

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Having the very same problem with a Red logo

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Jul 30, 2018 0
Adobe Community Professional ,
Jul 30, 2018

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PNG as well? If yes, try PSD instead.

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Jul 30, 2018 0
Adobe Community Professional ,
Jul 30, 2018

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Check your vector scope and see if its not oversaturated.

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Jul 30, 2018 0
Explorer ,
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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Jul 31, 2018 0
Adobe Community Professional ,
Jul 31, 2018

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Post properties logo, sequence settings and export settings.

Red tends to bleed, might want give it a black stroke.

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Jul 31, 2018 0
Explorer ,
Jul 31, 2018

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Dang, I just realized I'm posting in the Premiere forum, as search for Aftereffects brought me here. Using latest AE CC *facepalm*.
But as far as I understand it uses the same rendering engine? Either way, I've placed the plain logo in a premiere timeline, did an export, and it yields exactly the same result. I've also tried the same with the logo on a black background. same result.

Sequence Settings is 1080p25, export is H.264 high bitrate. I've attached the logo:

Sife Logo neu_ohne Hintergrund.png

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Jul 31, 2018 0
Explorer ,
Jul 31, 2018

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I even just tried exporting at 4K, which looks perfect on a 1080 screen, then recode it to 1080 using Media Encoder - and the result is the same. I'm going nuts.

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Jul 31, 2018 0
Adobe Community Professional ,
Jul 31, 2018

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The logo is but 622x481.

Did you scale the logo up?

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Jul 31, 2018 0
Most Valuable Participant ,
Jul 31, 2018

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Ask Alex - The 411 on 4:4:4 - YouTube

Chroma Subsampling: 4:4:4 vs 4:2:2 vs 4:2:0 - RTINGS.com

Chroma subsampling - Wikipedia

In a nutshell, every pixel in original logo still graphic can have a unique color. When exporting to a compressed video format, likely using 4:2:0 color, multiple pixels must then share one color as a group (in blocks), regardless of their original colors, thus the jagged edges on logo. Maybe if you can add some noise/dithering intentionally to create some randomness, versus going straight from red to black with no in between? Soften the edge of logo a little bit?

Thanks

Jeff

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Jul 31, 2018 1
New Here ,
Aug 10, 2018

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I think this is correct, actually.

I've also had this issue in two different projects now, both with red/orange graphics (still and animated) that suddenly look pixellated after export from premiere pro.  everything looks fine in the timeline, but jagged after export.

After lots of hair pulling... I came here and read @SAFEHARBOR11's post, and tried exporting a ProRes 4444 version and boom... fixed.

I realize ProRes 4444 is not a great solution for everyone/every project... the files are huge.  If only 422 sampling would fix it too.  Good to know it's at least a limitation of the video encoding, and not a bug of some kind.

If anyone has any creative workarounds I'm all ears.

-B

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Aug 10, 2018 0