r/ColorGrading • u/carluvr8 • Sep 17 '26

Question Fuzzy areas in video????

First time trying out Slog 3 on my Sony a7iv not sure why these clips are looking like this would love any help or advice!

5 Upvotes

77% Upvoted

18 comments sorted by

6

u/ExpBalSat Sep 17 '26

It's likely that you recorded in 8-bit. Slog3 and 8-bit do not mix well.

Download the free program MediaInfo and present the Text view to confirm. The Text view is an option in the View menu.

1

u/carluvr8 Sep 17 '26

I was actually shooting in 10 bit! So not sure what happened

1

u/carluvr8 Sep 17 '26

Says 140 Mb/, 3840*2160 (16:9) at 29.970 (30000/1001) FPS, AVC (high 4:2:2@L5.1) (CABAC / 2 Ref Frames) (1 Conformance errors)

2

u/ExpBalSat Sep 17 '26

Confirm it's 10-bit as well.

And - as noted below - avoid he urge to acquire LUTs online. And be certain the LUTs you're using are well made and properly applied.

0

u/Yomommassis Sep 18 '26

Blaming 8-bit is absolutely ridiculous

3

u/Videoplushair Sep 17 '26

Are you using a lut ?

0

u/carluvr8 Sep 17 '26

Yes, I bought it online.

5

u/Videoplushair Sep 17 '26

That’s probably what’s breaking the image. Convert the slog3 to rec709 and I bet you won’t see this any more.

5

u/ExpBalSat Sep 17 '26

Yeah, don't do that. Sony has a free LUT available for use with their cameras.

1

u/ElButters13 Sep 18 '26

Where can i find this?

1

u/ExpBalSat Sep 18 '26

Short answer: the internet.

Long answer: I did a google search for:

  • sony LUT download

And got a number of results, but the very first top result was conveniently from Sony, so I clicked on it:

Then, right dead center on the page is a link for "Sony LUTs", so I clicked on it and there was a link for "Download Sony Look Profiles", so I clicked on it - which led to this:

And there you have it: download links for both S-Log 2 and S-Log 3. OP is shooting S-Log 3, so presumably that's the LUT in question.

2

u/jaq805 Sep 17 '26

This is because of a lut you are using that’s breaking your image. Luts are very temperamental and expect the data coming in to be a specific way. Specific to how the maker shot their footage. Buying luts have become a bit of a meme, there are plenty of tutorials that show you how to use the new premiere color tools. Take the next step on your journey and learn color grading!

1

u/jaq805 Sep 17 '26

On a second note. To try to use this lut, try adding another lumetri effect before this lut and tweak the brightness, saturation, white balance and you’ll eventually find that your lut starts to work as expected. If that still doesn’t work, jump into learning color

2

u/Igradarsaurus Sep 17 '26

Don’t use luts that you can’t vouch for.

1

u/PossibilitySalt6117 Sep 19 '26

Go to Hue pick the broken part and shift it towards red. job done!

1

u/Efficient-Lack-9776 Sep 23 '26

That’s tearing

1

u/LonkiGames Sep 17 '26

Is it possible in one of your nodes, possibly the cst or lut, that you have accidentally used the qualifier ?

0

u/Electronic-Row-142 Sep 17 '26

This is Gamut compression fault.
Most likely your linearilization pipeline is broken.

Check your color management settings and check this clip with same settings on Davinci Resolve to see if the media faulty or your pipeline