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Attila Bakos

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Posts posted by Attila Bakos

  1. Which display do you use to record patches from? We discussed earlier that you don't want to tell what you do with out-of-gamut colors, but maybe you can tell me if those are simply extrapolated or you use some other kind of sorcery, maybe recording a few values from real life? You can reply in private if that's better. The reason I ask is because I also do conversions the same way you do, with my own software, and the values my monitor can't show are extrapolated, which is always to be taken with a grain of salt. I could use some hint from someone with more experience. I'm no competition btw, if that matters.

  2. 42 minutes ago, markr041 said:

    The good news is that YouTube converts the HDR video, if it has the correct metadata, to an SDR version and shows the SDR version if it detects no ability to display the HDR video correctly. That is, if the video is HLG and the display cannot work with HLG videos then it plays the SDR version.

    And, in my experience, the SDR version of HLG videos converted by YouTube look good.

    I haven't tried it, but it seems you can also provide hints for the SDR downconversion with your own 3D luts. Check the "More control over SDR conversion" section here: https://support.google.com/youtube/answer/7126552?hl=en

  3. 17 minutes ago, Andrew Reid said:

    So they added F-LOG and IBIS to an X-T2 basically (if the rumours are to be believed)

    Exactly, and you don't really want to use F-Log with 8bit 4:2:0, I have found it to be unreliable even in 8bit 4:2:2 Prores. Sometimes even a simple S curve and a gamut conversion is enough to break it, I think it really needs 10bit, or some tweaking. Let's wait and see if the X-H1 gets it externally. My hopes are pretty low though.

  4. 16 hours ago, Sage said:

    - It won't.. The problem with that first effort was that I failed spectacularly :) I invested so much into it, and I almost gave up at that point

    Then how do you match with a monitor? You ignore the colors your monitor can't show?

  5. 4 hours ago, Sage said:

    Go you Attila! That's actually a pretty close description of my first process.

    What I've done since is the hush hush part  ;

    I'm actually a programmer but only a web programmer and I think the math required for this transformation is beyond my skills. I think I would even pay for someone to teach me that, I don't even know where to begin :) The other problem is the gamut of the displays available today. The one I have only covers sRGB, but even if I get one with Adobe RGB, is that enough for a such a conversion?

  6. 10 hours ago, Sage said:

    The software I'm referring to there is my own, geared to a very particular task

    Oh that's cool. I wish I had the skills to do something like that. In theory, could you use a wide gamut monitor, record thousands of patches with camera A, then use those measurements as reference, then measure the same patches in camera B and build a conversion LUT the way monitor calibration softwares work? Or is this a completely bad idea?

  7. 1 hour ago, Sage said:

    I can say, several pieces of software in chain. However, I will be coding something that will fine tune the process, and simplify it to one.

    Is that by any chance 3D LUT Creator? I tried to do profile matching before and I didn't find anything better for that purpose, but I'm interested in more experienced people's recommendations.

  8. 53 minutes ago, Django said:

    The RGB Histogram & Highlight warning is only available on stills shooting though.. and still no internal F-Log :((

    You can enable the highlight warning separately in the display custom settings, then it works in video mode too. But unfortunately you are correct about the RGB histogram, there is no way to show that in video mode.

    I few weeks ago made a video about F-Log, you might find it helpful:


    As you can see you can live without F-Log, and it's not without problems. I guess you would run into even more problems if it was recorded in-camera with 100Mbps H.264.

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