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

An update to Premiere Pro that makes this issue easier to handle will be coming later in 2023. We will update this thread with more information when it is available. 

Regards,

Fergus

That Vimeo from Baselight is one look at the issue. It's not necessarily accepted as an accurate view, though, by many of the other folks out there in color management. One significant misreading is typically cited. Whether by Steve Shaw at LightIllusions or others.

That video assumes that the original Rec.709 standard from many years ago is still the entire standard. But it hasn't been for years! Not since flat-panel digital monitors replaced CRT monitors. The digital monitors had a very different image from the 'native' digital signal. They therefore required either the additional spec of a display gamma or a change to the camera transform process.

Adding a display transform to the Rec.709 standard was thought simpler.

Bt.1886 was appended to the Rec.709 standard years ago. And the traditional broadcast/network/streaming processes for years now have included the expectations below for Rec.709:

• sRGB primaries
• camera transform of 1.95
• display transform of 2.4 (dark room viewing) or 2.2 (bright room viewing) {added as Bt.1886}
• 100 nits screen brightness in moderately-dark-room grading

This workflow was the accepted manner of working with NCLC tags of 1-1-1, and the monitors were carefully calibrated and profiled to the above display specs. It's what both Resolve in "auto" mode and Premiere Pro applied to Rec.709 files.

Apple chose to return to the original Rec.709 spec and ignore the Bt.1886 appended specification. Think of this as "the real Rec.709," ... but Apple changed that years ago. And applied throughout professional workflows.

Until ... ColorSync reverted.

Been dealing with this for years. Best I've figured out is to make sure directors and clients use VLC to do their official reviews (esp if reviewing color). Not ideal, but I've got nothing better! arkalmed is on to the real fix there, just need to make engineers aware of it.