Blackmagic Forum

please decouple the DCP creation from the [timeline setting] in the color page, those settings are used for two different tasks ad they are conflicting..

put a checkbox with the option to use either:
1) [timeline setting] (as for now)
2) nothing (the operator will use the color page for that)
30 duplicate the [ofx color transform] so the operator can take advantage of it.

You can export a DCP from Color? You don't need to go to Deliver?

Jim Simon wrote:You can export a DCP from Color? You don't need to go to Deliver?

not that I know of, you have to go n delivery, besides, the issues mention ed will remain.

waltervolpatto wrote:please decouple the DCP creation from the [timeline setting] in the color page

Well, now I'm confused. If you can't create a DCP from Color, what does that above mean?

Even when you're not in RCM, the timeline color setting serve two purposes:

In delivery, for the creation of the dcp
In color for the color transformations back and forth, especially at the node level.

Those are incompatible.

I'm still lost. I'm just gonna beg off this one.

Jim Simon wrote:I'm still lost. I'm just gonna beg off this one.

It is complicate.

1) lets say that you set the timeline color to rec709/gamma2.4. When you export a DCP, resolve will implicitly convert rec709/gamma2.4 to XYZ/2.4 all is good, IF AND ONLY IF you where looking and coloring to a rec709/gamma2.4 screen, if by any chance you where correcting on a P3DCI white point projector, the conversion will be wrong.

2) but, let’s say that you want to use that setting in the color phase. I have an Alexa camera, and my color space is AlexaLogC. Let’s say that I want to take advantage of the very convenient right click menu in a node that convert the color space I use for my coloring to (for example) linear light. Very simple, I do right click, [linear] (or Lab, or whatever) and do my correction/effect, whatever.
What really is happening under the hood, resolve use the Timeline setting to go from the coloring space to [linear] in my example, and if I want to do it correctly, I have to set the [timeline color] to AlexaLogC.
Same for the default in [ofx color space transform]... they obey to [timeline coilor] setting and in my case, if i want to uniform a timeline color space I need to set it up to AlexaLogC.

If you have the color space in AlexaLogC and you got to the final display (let’s say P3DCI) with a look/LUT/whatever, and you attempt to do a DCP, the math in the delivery page will be AlexaLogC to XYZ/2.6..... being completely wrong....

There is that....

waltervolpatto wrote:lets say that you set the timeline color to rec709/gamma2.4.

Ahhh.

That's one of the reasons I prefer ACES. I find the ODT a simpler method.

Jim Simon wrote:

waltervolpatto wrote:lets say that you set the timeline color to rec709/gamma2.4.

Ahhh.

That's one of the reasons I prefer ACES. I find the ODT a simpler method.

ODT might also generate non visual matches on some ODT combinations....