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pienkie01
Participating Frequently
August 1, 2024
해결됨

Is it possible to embed Rec.2100 color profile in DNxHR MXF OP1a exports?

  • August 1, 2024
  • 1 답변
  • 632 조회

Pretty much as the subject says. I've searched far and wide, but found no answer.

 

I need to export a UHD HDR file for broadcast with the DNxHR codec, but they also want the colorspace  embeded. I mannaged to do this successfully with HVEC, Prores and XAVC MXF, but with the same project settings, sequence settings and source settings I can't manage to for DNxHR MFX OP1a. It's not even an option in the export settings where the other codec I've mentioned do have it as options. I've tried exporting directly from Premiere and by sending to Media Encoder with no luck.

 

Latest version Premierre Pro, updated GPU drivers, tried both hardware and software rendering.

 

Is it a limitation of Premiere Pro or does the format not support embedded profiles?

 

Attached are the properties of the resulting file exports.

    이 주제는 답변이 닫혔습니다.
    최고의 답변: R Neil Haugen

    Just did an export to DNxHR HQX ... checked the file in MediaInfo, the only color space listed was YUV, which is expected as the two encoding style options are RGB (the 12-bit format) and YUV (all 10 & 8 bit). Both RGB and YUV encoded file types can be either SDR or some form of HDR depending on stuff.

     

    From my understanding, DNxHR is intended to work with either SDR or HDR, so it doesn't have a normally embedded status for either Rec.709 or any HDR format. This is what I've heard being around colorists for some years now. But I could be wrong ... though the coloritsts I work for/with/teach all set DNxHR per clip as their sequence needs.

    1 답변

    R Neil Haugen
    R Neil Haugen답변
    Legend
    August 1, 2024

    Just did an export to DNxHR HQX ... checked the file in MediaInfo, the only color space listed was YUV, which is expected as the two encoding style options are RGB (the 12-bit format) and YUV (all 10 & 8 bit). Both RGB and YUV encoded file types can be either SDR or some form of HDR depending on stuff.

     

    From my understanding, DNxHR is intended to work with either SDR or HDR, so it doesn't have a normally embedded status for either Rec.709 or any HDR format. This is what I've heard being around colorists for some years now. But I could be wrong ... though the coloritsts I work for/with/teach all set DNxHR per clip as their sequence needs.

    Everyone's mileage always varies ...
      P
      pienkie01작성자
      Participating Frequently
      August 1, 2024

      "depending on stuff." 🤣 That's the way I would have put it too.

       

      Thank you for your answer. I think the broadcast engineers were looking for an easy way the interpretation could be triggered by an embedded profile. Seems it will have to be done manually or with a much cleverer algorythm.  Or a different format and/or codec.

      R Neil Haugen
      R Neil Haugen
      Legend
      August 1, 2024

      DNxHR is an interesting ... thing. A wonderful codec, technically. And it can be about any bit/color depth, full or legal, SDR or HDR ... and that itself leads I think to confusion when using it.

       

      Take the full/legal thing. According to Avid, the creator of it, they allow either full or legal for both the YUV and RGB iterations of the codec. Typically, "by the Book ..." ... RGB is always full, YUV (Y/Cb-Cr) is always legal. Adobe's lead color scientist requires Premiere to go "By The Book!" ... and always be full with RGB, never full with YUV. I've had discussions with him about this.

       

      Well ... that may be "normal by the Book" behavior ... but it's not the actual, practical, accepted usage of this codec, in many professional situations. And as someone who works for/with/teaches pro colorists, this decision ticks them off at times. Understandably so.

       

      Because by design, DNx allows things that might not be normally done.

       

      And I think one of the design choices was to allow the codec to carry pretty much any color data/depth. And so I don't think they expect a Rec.709 or HLG or whatever 'tag' in the file header. Which can also be confusing. And not particularly expected behavior.

       

      Now, if Fergus or Warren or someone has more accurate knowledge, yea, yippee and welcome. But I think that's the deal here.

       

       

      Everyone's mileage always varies ...
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