QuickTime gamma shift [Prevent color shift on export from premiere on MACOS]

Apparently you're using the Transmit Out in Premiere?

The terminology matters because "reference monitor out" technically refers to an entirely separate process, using a breakout device to feed a "clean signal" to the monitor. Such as by BlackMagic (Decklink cards among others) or AJA.

If using Transmit Out, and!!!! the color space/setup of the monitor used matches the monitor used by the main app window, where Program monitor is located, the images should be very similar.

Note, no one has ever completely matched two monitors to each other. As has been demonstrated numerous times in pro colorist confabs by both colorists and color scientists.

And the ones I've seen were using matched Grade 1 Reference monitors, the expensive ones colorists use for Reference work. Fed a signal by a breakout device and calibrated and profiled with Calman or Lightspace first. And you could still see differences in the image. Smallish, but notably there.

Let's just draw a line under this one.

For those in a simialr situation, the colour management and viewer gamma curve options affect the Source and Program windows only, not the reference monitor out. So for colour grading make the ref monitor a full screen program window. Not ideal, but good progress.

Still unclear ... are you making the Program monitor full-screen, as can be toggled, or using the tool called Transmit Out in the Preferences, where you select a screen to be sent the signal?

Which leaves the Program monitor still functioning, of course. If so, and the monitors are both set correctly, the image should be the same or pretty close. You simply cannot totally match two monitors, as has been demonstrated by pro colorists and color science folks over and over.

Using a BlackMagic or AJA breakout device, whether card or external box, is of course an entirely different process. A third option.

By reference monitor I just mean the full screen third monitor, maybe this is a generic UK term. But no doubt we're all it. Also pretty sure that's not a Premiere term sorry, my best definition is the "video stream" button that you check for it the Playback settings.

Am sure you're aware it used to be a loop outside of editing app's, we had the Matrox or Blackmagic boxes to the CRT monitor. And am assuming we're still trying to extricate outselves from that

As there is no longer the Reference monitor in Pr2025, I'm wondering what you are referring to. Do you mean the Transmit Out option?

I've tried the viewer gamma fix and am left with a small snag. Is this applicable to just the source and program monitors, but NOT the reference monitor?
So to grade "properly" or at a best guess, I am full screening the program monitor instead of using a reference video stream output. Is that where we're at with this?

The Resolve NCLC tag uses an unspecified tag, that their devs found caused the Macs without Reference modes to use a display transform of 2.4.

However, on various systems and QC machines and such it can cause other, totally unexpected, behavior.

So it's also a workaround with some flaws.

But in reality, one of the first things colorists are taught is that no one will ever, by any deliverables method, see exactly what they saw on their Grade 1 Reference monitor fed via a breakout device in that semi-darkened room.

Most of the time, not even particularly close. The reality is that every screen varies from even identical units, and viewing conditions and firmware and OS and such add their own variables.

So how much is sweating over this going to actually be notable by the wide array of potential viewers? Maybe less than you assume.

Changing the Gamma is fine if you know it's going to be viewed on that gamma setting. Resolve embeds a piece of code into the file so that if it's going to be viewed in QuickTime it recognizes the code and views it correctly. Can't Adobe do something similar? Feel like Adobe is bolting on little half fix patches when this has already been addressed properly by their competition. 

DUUUUDE! THANK YOU FOR THIS! This is my fix! Ive been using the Gamma Compensation LUT to fix the shift on export but my viewer gamma in premiere was set to '2.4 Broadcast'. Once I chnaged it to 1.96 Quicktime BOOM, no more color shift and its mathcing in QT player, and my iphone. 

That is good advice if you work on an Apple computer without reference modes for the monitor ... but it may not give the best image on most other gear.

Sadly.