mLut issue when applying LUT

Question

mLut issue when applying LUT

I'm currently working on a wedding video on fcpx 10.4 and am trying to apply LUTs on my clips. Once I've applied the custom LUT, the clip looks fine until I render the clips. Once rendered, a small flickering square on the top left portion of the video flickers back from the non color graded clip to the color graded clip. It's only happens in the right upper quadrant of the clip. It happens to some clips and some render just fine. Can anyone help me out with this, or has experienced this issue? I've also used the original mLUT lots provided for free and they still have the same issue, so it can't be the custom LUTs I downloaded.

MacBook

Posted on Nov 19, 2019 8:36 PM

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Answer 1

fox_m

Level 6

12,511 points

Nov 20, 2019 10:47 AM in response to allgoldrondoe

Have you exported to ProRes? ProRes LT is usually good enough and uses

less memory. I don't use LUTs, but exporting to ProRes usually solves

the problems I run into with "unexpected" color shifts.

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Answer 2

Nov 20, 2019 12:02 PM in response to Tom Wolsky

So I’m using mLUTs with a custom third party LUT. But I tried the built in LUTs that comes with mLUT and it still causes the footage to flicker, so that rules out there is a problem with the custom LUT Maybe it mLUT itself? Is there any other LUT generator i can use to apply custom LUTs to my clips?

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Answer 3

Nov 20, 2019 6:12 PM in response to Tom Wolsky

Tom, I used the Custom LUT install in the color category of effects and it worked!! it does not give me that blinking glitch anymore like it did with mLUT so it must have been that. Thank you so much!

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Answer 4

Tom Wolsky

Level 10

151,831 points

Nov 20, 2019 12:19 PM in response to allgoldrondoe

The application has a Custom LUT instale in the Color category of the Effects Browser.

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Answer 5

Alchroma

Level 7

23,821 points

Nov 20, 2019 3:31 AM in response to allgoldrondoe

250860133

Al

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Answer 6

Nov 19, 2019 8:38 PM in response to allgoldrondoe

This is an example of a frame of a clip. Top left portion flickers in and out of the LUT.

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Answer 7

fox_m

Level 6

12,511 points

Nov 19, 2019 11:38 PM in response to allgoldrondoe

Are you exporting your video as H.264? FCPX 10.4.7?

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Answer 8

Tom Wolsky

Level 10

151,831 points

Nov 20, 2019 3:25 AM in response to allgoldrondoe

Is this only happening with mLUTs?

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Answer 9

Nov 20, 2019 6:48 AM in response to Tom Wolsky

I have not tried any other LUT generator.

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Answer 10

Nov 20, 2019 6:50 AM in response to fox_m

I have not tried exporting in H.264. I believe i exported through Apple devices and better quality as a rough draft to see whether the blinking was still there and it was.

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