Is there a camera raw style colour mixer? Plugins?

First things first ... I came out of a long pro stills carreer, into video, about a decade ago. Including running our own full wetlab back in film days and also being one of the first studios in Oregon to go fully digital. Was vastly experienced in color digital imagery in both Lightroom and Photoshop.

Thought that video & stills would be a lot alike. 

Big mistake, they aren't. Still image processing is at most one image at a time, maybe at most a batch of twenty. From carefully crafted images, often in our case, full camera raw files.

Video post means the computer routinely handles 30 or more frames per second, so the sheer volume of work the system must do is magnitudes more than for stills.

And then ... quite often, the video images may be a bit less 'forgiving' than the still images, with 16 bit tiffs and all.

So everything about video image controls and corrections is very, very different from stills. You're pretty nearly starting over. And that was a huge shock for me at first.

Over on my blog, there's some posts especially if you go back a page, about the controls of the Lumetri panel and what they do exactly. Might be very useful for you to peruse.

rneilphotog.com

If you can apply the same correction to a number of clips at the same time, you save yourself a truckload of time from applying those piecemeal to the clips on a sequence. Whether it's in copy a Lumetri instance then pasting on a bunch of other clips. Selecting a group of clips in a project panel/bin, and pasting the Lumetri over the whole group. Which puts it on the "source" tab when you're on the sequence.

It's that sort of thinking you need to learn to do. Think strategically. And save yourself hours of work.

I suggest starting with a basic white balance in the Basic tab, then check the scopes ... RGB Parade probably ... to see if the shadows are similar or if you've got a shadow cast to correct also. Which would be done in the Creative tab's Shadow 'tint' control. Slide the "balance" slider below  those controls well over to the left, so the changing of the shadow control only affects the shadows.

Now perhaps use Exposure in Basic tab to set the middle of the image correctly, and trim a bit with Contrast, and/or Shadow and Highlight controls. Get your tonal ranges set for a more visually neutral image.

Do the above before doing any other work ... you want as much apples to apples here. And if you've got two or three cameras, do this to a couple clips each. Then pick one as the main cam, and work a bit with the Hue V whatever, to get again a more neutral image.

Now copy/paste to the rest of that cam's clips.

Now do the same WB and tonal neutralization to the second cam, then do the Hue V stuff to make that closer to the first cam. Not perfect, just closer. Copy/paste.

Now you can work down a sequence, and your clips are a lot closer to each other to begin with.

This ain't stills.

The Hue v Hue and other such curves are just ... the way they are. It's probably easier to use them applied to batches of clips than on a per-clip basis.

In other words, you have Cam A and Cam B ... check a couple clips, do the variuos curves if you choose that path to neutralize the color. Save as a named Lumetri preset. You can then apply this to all clips from Cam A in the Project panel/bin.

Now go to Cam B, and do the work to get a couple clips of that fairly close to Cam A, save as a named Lumetri preset. Apply to all of Cam B's clips.

Now ... you probably have a ton less to match down the sequence. And use the Basic tab and Color Wheels to do the rest of the work.

The other color plugin that I use occasionally is the Maxon Red Giant Colorista.

Neil