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Cratin24
Inspiring
January 8, 2024
Answered

Magenta Color Shift in Arri Alexa 35 Footage

  • January 8, 2024
  • 20 replies
  • 1908 views

Hello,

 

      I am currently editing a video utilizing footage from the ARRI Alexa 35 sho in LogC4.  I have applied the ARRI LUT conversion to Rec709.  When I am color-grading the footage and the clip is still, it will look like how I color-graded it, BUT when I hit play to watch the clip, it will tint the entire frame a slight pinkish/magenta. Once I hit pause, it will go back to what I originally color graded. I tried exporting a clip, to see if it renders out the shift, and it does. I attached a photo showing this shift.  In the photo, the image on the left is from a rendered out frame of the video, while the photo on the left is what the color grade looks like on a paused timeline. Any ideas what could be causing this?  I do not have two LUTS applied and my color space is Rec709.

 

Thanks,

Cratin

 

Adobe Premiere Pro 2024 Version 24.1.0

Windows PC with 24-Core 3.8GHz Threadripper

NVidia GeForce RTX 3080

 

 

This topic has been closed for replies.
Correct answer Cratin24

Hey, everyone!  It looks like updating the NVidia driver might have done the trick.  I'll drop back on if anything goes awry between now and the finish of the commercial!

20 replies

J
Jordan21785100x8ch
Participant
April 17, 2024

Hi @Cratin24 - was this footage shot in ArriRAW or ProRes? I know the Alexa 35 puts ProRes in an .mxf format as well so can be hard to differentiate.

 

I'm having the exact same issue as you, except using a an Apple M3 Max MacBook Pro, and working with ProRes footage shot on an Alexa 35. 

R Neil Haugen
R Neil Haugen
Legend
January 10, 2024

Thanks for posting. I'm continually amazed what poor drivers can do ...

Everyone's mileage always varies ...
    Fergus H
    Community Manager
    Fergus HCommunity Manager
    Community Manager
    January 10, 2024

    Thanks for the update! That's great info. 

      C
      Cratin24AuthorCorrect answer
      Inspiring
      January 10, 2024

      Hey, everyone!  It looks like updating the NVidia driver might have done the trick.  I'll drop back on if anything goes awry between now and the finish of the commercial!

        C
        Cratin24Author
        Inspiring
        January 9, 2024

        I am currently running Ver. 536.99.  I'm going to update the driver and see if anything changes.

          C
          Cratin24Author
          Inspiring
          January 9, 2024

          Let me go see what NVidia driver I am using, and I'll check back in.

          Fergus H
          Community Manager
          Fergus HCommunity Manager
          Community Manager
          January 9, 2024

          Also, in addition to Eric's advice, I would suggest you check what Nvidia driver version your system is using. Another member of the team - with a very similar computer configuration to yours - was unable to duplicate the problem you're seeing. Their system is using Nvidia driver 536.40. 

           

          If a driver update doesn't help, sending us a sample file would be the next step. We do have an ALEXA 35 in our test lab (ok, in it's my attic home office right now!) along with several other ARRI cameras and we've not yet been able to duplicate the issue you're seeing. 

           

          Regards,

          Fergus

            eric escobar
            Community Manager
            eric escobarCommunity Manager
            Community Manager
            January 9, 2024

            Is it possible for you to share a clip with us? Is this happening with all Arriraw LogC4 clips from the Arri Alexa 35 or just a recent batch?

              R Neil Haugen
              R Neil Haugen
              Legend
              January 9, 2024

              Thanks for popping in Eric ... 

              Everyone's mileage always varies ...
              C
              Cratin24Author
              Inspiring
              January 9, 2024

              Yes, I have tried turning off "Display Color Management" and it still did it. It doesn't happen with other footage I bring in.  Only ARRI footage that I have worked with recently.

               

              Win/NVidia Geforce 3080/Pr24

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