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White dots appearing in film after exporting

Community Beginner ,
Aug 05, 2020

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Hi everyone!

 

I consider myself quite green when it comes to coloring a film. I just made a short film and upon exporting, I noticed white dots randomly popping up on screen. Any ideas why? I did usual color correcting from Log shot footage, then added only a 20% opactity Lut on top. It seems to be only the footage towards the end of my 20 minute film. I attached a photo for a reference example. 

 

Was all shot in 1080p and exported in high quality 1080p. 

 

 

Screen Shot 2020-08-03 at 10.13.59 PM.png

 

[Moderator note: please drag/drop images directly onto your text reply box so they show in your reply, and others are not required to download strange files to view them to help you. I fixed this one for you.]

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White dots appearing in film after exporting

Community Beginner ,
Aug 05, 2020

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Hi everyone!

 

I consider myself quite green when it comes to coloring a film. I just made a short film and upon exporting, I noticed white dots randomly popping up on screen. Any ideas why? I did usual color correcting from Log shot footage, then added only a 20% opactity Lut on top. It seems to be only the footage towards the end of my 20 minute film. I attached a photo for a reference example. 

 

Was all shot in 1080p and exported in high quality 1080p. 

 

 

Screen Shot 2020-08-03 at 10.13.59 PM.png

 

[Moderator note: please drag/drop images directly onto your text reply box so they show in your reply, and others are not required to download strange files to view them to help you. I fixed this one for you.]

TOPICS
Editing, Error or problem, Export

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Aug 05, 2020 0
Adobe Community Professional ,
Aug 05, 2020

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I'm not seeing any white dots ... this is 'expanded' enough I'm seeing what seem to be actual pixels, with some amount of video noise present.

 

I've a lot of experience with color in Premiere ... but what's a "20% opacity LUT" ? As a descriptor, I'm a bit puzzled.

 

Neil

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Aug 05, 2020 0
Community Beginner ,
Aug 05, 2020

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Hi Neil!

 

Thank you for replying! Apologies about that.

 

I put an adjustment layer overtop of all the footage and added a pre-made LUT to it. Adjusted the amount of the lut color by adjusting the adjustment layer opacity so it was not as strong. 

 

I know they do not look like much here, but if you expand it you can see. My fear is when this reaches a movie screen, it will be very obvious. Especially if I can notice it on fullscreen computer monitor. 

 

Here are some better references.

 

Screen Shot 2020-08-05 at 3.19.21 PM (2).png

 

Screen Shot 2020-08-05 at 3.18.56 PM (2).png

Screen Shot 2020-08-05 at 3.19.04 PM (2).png

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Aug 05, 2020 0
Community Beginner ,
Aug 05, 2020

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This is also a low quality export. Sorry for that but all I have on hand. Clearer white dot (or pixel) in 1080p. 

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Aug 05, 2020 0
Adobe Community Professional ,
Aug 05, 2020

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I'm wondering if the LUT is simply making a bad pixel in the film more obvious.

 

Take the same frame, without the LUT active, and raise contrast some. See if the pixels are showing the same in the same place.

 

Neil

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Community Beginner ,
Aug 05, 2020

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I think you just helped me narrow it down. Is it possible for that to come from the camera? 

 

Here is a shot with LUT off and all color correction gone.  

Screen Shot 2020-08-05 at 4.28.09 PM (2).png

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Adobe Community Professional ,
Aug 05, 2020

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Yes, you can have bad pixels in a camera, or alternatively, have a dust spot.

 

A dust spot will be seen on every frame 'while it lasts'. Some cameras do a shake-thing to clean sensors so you can have a dust spot for a part of a shoot, then turn the camera off and back on later and it's gone. If there's no auto-cleaning action of the camera, they're there until you get the sensor cleaned. Typically dust covers more than one precise pixel though.

 

Bad pixels are just there. Normally pretty hard to see while an image is playing though.

 

Neil

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Community Beginner ,
Aug 05, 2020

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I cannot thank you enough, Neil! Have a great night and stay safe!

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Aug 05, 2020 1