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Justin223649821pmf
Participant
November 4, 2025
Question

My c-log 3 footage is being interpreted as rec. 709

  • November 4, 2025
  • 1 reply
  • 175 views

I use a Canon c200 for my job. We shoot in c-log 3 and use Premiere 25.5 Build 13 on 2021 MacBook Pros running Sequoia 15.6.1. When the footage is imported to Premiere, it is interpreted as rec. 709 footage, so when I switch to "Wide Gamut (tone mapped) in Lumetri color, there is a subtle difference, but the automatic log footage detection doesn't work. I have to manually go to the clip and do a color space override. I'm wondering if Canon's c200 is supported with the automatic log footage detection or if this is a bug with the new ACES color management workflow.

    1 reply

    R Neil Haugen
    R Neil Haugen
    Legend
    November 4, 2025

    I would need to see basically the entire Lumetri panel Settings tab to see how the many CM settings are set. Open ("twirl down") all sections, do screengrabs, and drag/drop the screen grabs DIRECTLY onto the text reply area, don't 'attach' them.

     

    So we can see the pictures as part of your post without having to open them separately.

     

    And I would note, in the one pic of the camera media, HDR is turned off, well ... that leaves Rec.709 as the only other option. It's either Rec.709, or HDR in either PQ or HLG, and you aren't using the HDR formats.

     

    So really, I'm wondering if you aren't quite getting what to expect. If you have auto detect log and auto tonemapping, and a sequence set to Rec.709 as you show, then Premiere will not show a "log" image, but one remapped to Rec.709 by algorithms made from and with assistance of the manufacturer. (Not a LUT based operation, thankfully.)

     

    So ... what do you expect to see, and what are you seeing? Screengrabs and specific descriptive statements, please.

     

    Which doesn't hav

    Everyone's mileage always varies ...
    J
    Justin223649821pmfAuthor
    Participant
    November 5, 2025

    Thanks for this, it actually helped. I did some additional research and from what I could fine, HDR video recording is only supported on the C-200 when shooting in C-RAW which in turn is only able to be done on a C-fast card. Since we only shoot on SDs, it makes sense that I wouldn't be able to activate HDR mode and would thus be interpreted by Premiere as a rec.709 file.

      R Neil Haugen
      R Neil Haugen
      Legend
      November 6, 2025

      If it is actually encoded in real logarithmic math, and not the pseudo-log some cameras and drones do, then ... it shouldn't matter whether the file is tagged Rec.709 or not, it should be usable on an HLG sequence in Premiere.

       

      So it would be nice to get a short clip, and be able to test it here myself. A link to a dropbox/wetransfer, or via the forum's private messaging service would work.

      Everyone's mileage always varies ...
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