Hawaiki AutoGrade

The color correction tools in Final Cut Pro X are nice. Adobe’s Lumetri controls make grading intuitive. But sometimes you just want to click a few buttons and be happy with the results. That’s where AutoGrade from Hawaiki comes in. AutoGrade is a full-featured color correction plug-in that runs within Final Cut Pro X, Motion, Premiere Pro and After Effects. It is available from FxFactory and installs through the FxFactory plug-in manager.

As the name implies, AutoGrade is an automatic color correction tool designed to simplify and speed-up color correction. When you install AutoGrade, you get two plug-ins: AutoGrade and AutoGrade One. The latter is a simple, one-button version, based on global white balance. Simply use the color-picker (eye dropper) and sample an area that should be white. Select enable and the overall color balance is corrected. You can then tweak further, by boosting the correction, adjusting the RGB balance sliders, and/or fine-tuning luma level and saturation. Nearly all parameters are keyframeable, and looks can be saved as presets.

AutoGrade One is just a starter, though, for simple fixes. The real fun is with the full version of AutoGrade, which is a more comprehensive color correction tool. Its interface is divided into three main sections: Auto Balance, Quick Fix, and Fine-Tune. Instead of a single global balance tool, the Auto Balance section permits global, as well as, any combination of white, black, and/or skin correction. Simply turn on one or more desired parameters, sample the appropriate color(s) and enable Auto Balance. This tool will also raise or lower luma levels for the selected tonal range.

Sometimes you might have to repeat the process if you don’t like the first results. For example, when you sample the skin on someone’s face, sampling rosy cheeks will yield different results than if you sample the yellowish highlights on a forehead. To try again, just uncheck Auto Balance, sample a different area, and then enable Auto Balance again. In addition to an amount slider for each correction range, you can also adjust the RGB balance for each. Skin tones may be balanced towards warm or neutral, and the entire image can be legalized, which clamps video levels to 0-100.

Quick Fix is a set of supplied presets that work independently of the color balance controls. These include some standards, like cooling down or warming up the image, the orange and teal look, adding an s-curve, and so on. They are applied at 100% and to my eye felt a bit harsh at this default. To tone down the effect, simply adjust the amount slider downwards to get less intensity from the effect.

Fine-Tune rounds it out when you need to take a deeper dive. This section is built as a full-blown, 3-way color corrector. Each range includes a luma and three color offset controls. Instead of wheels, these controls are sliders, but the results are the same as with wheels. In addition, you can adjust exposure, saturation, vibrance, temperature/tint, and even two different contrast controls. One innovation is a log expander, designed to make it easy to correct log-encoded camera footage, in the absence of a specific log-to-Rec709 camera LUT.

Naturally, any plug-in could always offer more, so I have a minor wish list. I would love to see five additional features: film grain, vignette, sharpening, blurring/soft focus, and a highlights-only expander. There are certainly other individual filters that cover these needs, but having it all within a single plug-in would make sense. This would round out AutoGrade as a complete, creative grading module, servicing user needs beyond just color correction looks.

AutoGrade is a deceptively powerful color corrector, hidden under a simple interface. User-created looks can be saved as presets, so you can quickly apply complex settings to similar shots and set-ups. There are already many color correction tools on the market, including Hawaiki’s own Hawaiki Color. The price is very attractive, so AutoGrade is a superb tool to have in your kit. It’s a fast way to color-grade that’s ideal for both users who are new or experienced when it comes to color correction.

(Click any image to see an enlarged view.)

©2018 Oliver Peters

Advertisements

FCPX Color Wheels Take 2

Prior to version 10.4, the color correction tools within Final Cut Pro X were very basic. You could get a lot of work done with the color board, but it just didn’t offer tools competitive with other NLEs – not to mention color plug-ins or a dedicated grading app like DaVinci Resolve. With the release of 10.4, Apple upped the game by adding color wheels and a very nice curves implementation. However, for those of us who have been doing color correction for some time, it quickly became apparent that something wasn’t quite right in the math or color science behind these new FCPX color wheels. I described those anomalies in this January post.

To summarize that post, the color wheels tool seems to have been designed according to the lift/gamma/gain (LGG) correction model. The standard behavior for LGG is evident with a black-to-white gradient image. On a waveform display, this appears as a diagonal line from 0 to 100. If you adjust the highlight control (gain), the line appears to be pinned at the bottom with the higher end pivoting up or down as you shift the slider. Likewise, the shadow control (lift) leaves the line pinned at the top with the bottom half pivoting. The midrange control (gamma) bends the middle section of the line inward or outward, with no affect on the two ends, which stay pinned at 0 and 100, respectively. In addition to luminance value, when you shift the hue offset to an extreme edge – like moving the midrange puck completely to yellow – you should still see some remaining black and white at the two ends of the gradient.

That’s how LGG is supposed to work. In FCPX version 10.4, each color wheel control also altered the levels of everything else. When you adjusted midrange, it also elevated the shadow and highlight ranges. In the hue offset example, shifting the midrange control to full-on yellow tinted the entire image to yellow, leaving no hint of black or white. As a result, the color wheels correction tool was unpredictable and difficult to use, unless you were doing only very minor adjustments. You ended up chasing your tail, because when one correction was made, you’d have to go back and re-adjust one of the other wheels to compensate for the unwanted changes made by the first adjustment.

With the release of FCPX 10.4.1 this April, Apple engineers have changed the way the color wheels tool behaves. Corrections now correspond to the behavior that everyone accepts as standard LGG functionality. In other words, the controls mostly only affect their part of the image without also adjusting all other levels. This means that the shadows (lift) control adjusts the bottom, highlights (gain) will adjust the top end, and midrange (gamma) will lighten or darken the middle portion of the image. Likewise, hue offsets don’t completely contaminate the entire image.

One important thing to note is that existing FCPX Libraries created or promoted under 10.4 will now be promoted again when opened in 10.4.1. In order that your color wheel corrections don’t change to something unexpected when promoted, Projects in these Libraries will behave according to the previous FCPX 10.4 color model. This means that the look of clips where color wheels were used – and their color wheel values – haven’t changed. More importantly, the behavior of the wheels when inside those Libraries will also be according to the “old” way, should you make any further corrections. The new color wheels behavior will only begin within new Libraries created under 10.4.1.

These images clarify how the 10.4.1 adjustments now work (click to see enlarged and expanded views).

©2018 Oliver Peters

Blackmagic Design DaVinci Resolve 14

DaVinci Resolve has made its mark as one of the premier color correction applications for the film and video industries. With the introduction of Resolve 14*, it’s clear that Blackmagic Design has set its sights higher. Advanced editing functions and the inclusion of the Fairlight audio engine put Resolve on track to be the industry’s latest all-in-one post-production powerhouse. I’ve reviewed Resolve in the past as a grading application, but my focus here is editing. Right at the start, let me paraphrase the judges on History Channel’s Forged in Fire series – ‘This NLE can cut!’ If you have no prior allegiances to other editing platforms, then using Resolve as your NLE of choice is a no-brainer.

(*This review was originally written right after the release of Resolve 14 in late 2017.)

DaVinci Resolve 14 comes in two flavors, DaVinci Resolve 14 (free) and DaVinci Resolve Studio ($299). Upgrades have been free to date. It’s the only NLE to support three operating systems: macOS, Windows, and Linux. Mac users also have the option to download Resolve (free) or purchase Resolve Studio through the Apple Mac App Store. These versions are basically the same as those on Blackmagic Design’s website, but with some differences, due to the requirement that App Store software be sandboxed.

Resolve offers the majority of the same features as Resolve Studio. The primary limitations are that exports are capped at UltraHD (3840×2160), and that features such as stereo3D, lens distortion correction, noise reduction, and collaboration require Resolve Studio. Regardless of the version, Resolve is a very deep application that’s been battle-tested through years of high-pressure, enterprise-grade deployment. But is that enough to sway loyal Final Cut Pro X, Premiere Pro, or Media Composer editors to switch? There’s certainly interest, as Stephen Mirrione pointed out in my recent Suburbicon interview, so I wouldn’t be surprised to hear news of a TV show or small feature film being edited with Resolve in the coming year.

The all-in-one concept

Creating a single application that’s good at many different tasks can be daunting and more often than not has been unsuccessful. In the case of Resolve, Blackmagic Design has taken a modal approach by splitting the interface into five pages: Media (ingest/import), Edit, Color, Fairlight (audio mixing), and Deliver (export/output).

The workflow follows a logical, left-to-right path through these five stages of post-production. With each page/mode change, the user interface is reconfigured to best suit the task at hand. The Edit page sports a standard source/record/bin/track layout similar to Media Composer, Premiere Pro, or Final Cut Pro 7. Color switches to the familiar tools and nodes of DaVinci color correction. The Fairlight mixing page isn’t just a mimic of the Fairlight interface. The engineers completely swapped out the audio guts of Resolve and replaced it with the Fairlight audio engine.

Not only is the interface that of a respected DAW, but it is also possible to expand your system with Fairlight’s audio acceleration card, as well as add a Fairlight mixing desk. This means that in a multi-suite facility, you can have task-specific rooms optimized for editing, color grading, or audio mixing – all using the exact same software application without the need for roundtrips or other list translations.

But does it work?

I put both versions of Resolve 14 through the paces and the application is reasonably solid, given how much has changed from version 12 (there was no version 13). General media management, editing, and audio processing is top notch. If you want audio/video output, Blackmagic Design Decklink or UltraStudio hardware is required. There is also a Cinema viewer function for fullscreen viewing on your computer display. With dual displays, the edit interface can be on one along with fullscreen video on the other.

The Fairlight mode will likely require a bit of rethinking by editors used to mixing audio in other NLEs, since it uses a DAW-style interface. Many well-known physical mixing consoles, like those from Solid State Logic, feature channel strips with built-in EQs, compressors, etc. That’s how Fairlight treats these software channels or tracks. Each track can have its own combination of Fairlight audio processing functions. Stick with those and you’ll be happy, although other audio filters on your computer, like Apple AU plug-ins, are accessible. Mixing and audio editing is good with subframe accuracy and the 14.1 update added linked groups to lock faders together. The pace of Fairlight integration was quite fast, but it’s still a bit rough. I encountered a number of application crashes only in the Fairlight page, while scrubbing audio.

Whether or not you like the editing is more a function of personal style and preference. The user interface design is a lot like Final Cut Pro X, except with bins and tracks. Interface windows, tabs, and panels can be opened or pulled down into various screen configurations, but you don’t have freeform control over size and position. Clearly Premiere Pro is king in that department. Some design choices aren’t consistent. For example, you can’t enable a single-viewer layout when using two displays.

Multicam editing is solid, but I experienced a small bit of latency in the viewer when cutting camera angles on-the-fly. It’s minor and may or may not bother you. You can sync clips by various methods, such as timecode or waveform, but oddly, it seemed to be too lax. In my tests, it would frequently sync clips that it shouldn’t have when a sync relationship didn’t exist.

There are a number of things in Resolve’s design that take getting used to. For example, a Resolve project is locked to the frame rate you picked when that new project was created – same as with Avid. This means you can’t mix sequences with different frame rates within the same project. There are no adjustment layers, although you can fake it in the Color page by using clip and program-based corrections. Color management via LUTs (look-up tables) is much deeper than any other NLE. You can set color management with LUTs to be global, which is best when the project uses only one camera type. Conversely, input LUTs may be applied singly or in a batch to specific cameras in a bin. But, when you do that, the LUT process doesn’t show up in the color correction node (only its result), when you switch to the Color page. On the plus side, real time performance has been improved from previous versions and the built-in effects include filters that you don’t often find in the basic build of other NLEs, like glow and watercolor effects. In addition to great built-in effects, third-party OpenFX packages, like Boris Continuum Complete and Sapphire are also available.

Collaboration

Resolve uses bin-locking like Avid Media Composer. The first editor to open a bin has read/write permission to it. Any other editor can open that same bin in a read-only mode. For example, in a long-form project, separate bins might be organized for Act 1, Act 2, and so on. Different editors can separately work on parts of the film at the same time. Since this all happens in a single database file, it always reflects the most current state of the project.

To set up shared projects, a different PostgreSQL database is required, which is installed through the custom options of the installer. Make sure you are using the most recent version when upgrading Resolve, since the older versions of PostgreSQL are no longer compatible with the newest OS versions. One machine on the network hosts this database and then other workstations connect to that database to access the Resolve projects. Only that host machine needs to have PostgreSQL software installed on it. The process of adding and connecting shared databases has been improved and simplified with the release of 14.1.1 (and later), which now includes an additional server set-up utility application.

In testing collaboration features, I initially ran into set-up problems. These were eventually fixed when I disabled the macOS firewall on the host machine, which was blocking access from the other connected Macs to its shared database. This took some back and forth with Blackmagic Design’s helpful support engineers until we figured out why I was getting the connection errors. Since I had to return the additional “dongle” (USB license key) before this was fixed, I wasn’t able to test two editors simultaneously editing within the same open project. However, the ability to open any shared project from any qualified computer on the network was just fine.

DaVinci Resolve Micro Panel

I also tested the smaller, bus-powered DaVinci Resolve Micro panel. The Micro panel is just the right size for an editor or a DIT on set. It’s smaller than the Mini (tested previously in another review), because it doesn’t have the upward slanting portion in the back; therefore, it’s a better physical fit between your computer keyboard and display. You don’t have to shuffle desk real estate between tools, as you do with the Micro panel. In spite of not having the extra controls and LCD displays of the Mini, the Micro panel combines most of the control functions you need for fast grading. If you are an editor who is heavy into color correction, then this is a must-have for Resolve.

I took an instant liking to the Micro. You can use both hands to quickly and intuitively work the trackballs and knob controls, making for faster and better correction. It’s tactile, with next and previous clip buttons to quickly advance through the timeline, so you can keep your eyes on the screen. I grade in Resolve, Avid, Premiere Pro, and Final Cut Pro X, and all of that is with a mouse. Using the panel easily resulted in faster grading by a factor at least 3X or 4X. I also achieved better-looking corrections with fewer steps or processes than grading in any of these other applications.

Conclusion

Overall, there’s a lot to love about Resolve, in spite of a few rough edges. In general, it seems more stable under macOS Sierra than with High Sierra. If you use Resolve on a Mac, then you are stuck dealing with Apple’s platform changes. For example, recent Macs that use an Nvidia GPU are at a disadvantage under High Sierra, because Nvidia is just now developing drivers for CUDA under this OS. I experienced a number of crashes running Resolve 14 on my 2014 MacBook Pro until I manually changed the Resolve hardware configuration under Resolve’s preferences from CUDA to using Metal. When I installed what was supposed to be the newest CUDA driver, I still received a prompt that no CUDA-compliant card was present. But, it’s working fine using Metal. Macs with AMD GPUs should be fine.

Resolve 14 is a dense tool, with a lot of depth in various menus, which some may find daunting. This review would be a lot longer if I went even deeper into the many specific features of this application. Yet, it is easy for new users to hit the ground running and then learn as they go. For many, this is their mythical “Final Cut Pro 8”. In any case, DaVinci Resolve 14 is the best incarnation of the all-in-one concept to date. If you add Blackmagic Design’s Fusion visual effects software into the mix (also available in free and paid versions), the result is a combination that’s tough to beat at any price.

Blackmagic Design’s engineers have shown impressive development over a very short period of time, so I fully expect Blackmagic to give the three “A” companies a run for their money. Even if you use another tool as your main editing application, Resolve is a great addition to the toolbox. Using it becomes addictive. Give it a try and you might just find it becomes your first choice.

©2017, 2018 Oliver Peters

What’s up with Final Cut’s Color Wheels?

NOTE: The information presented here has been superseded by the release of FCPX 10.4.1 in April 2018. With that release the color wheels model has been changed. Please read the linked blog post for updated information.

Apple Final Cut Pro X 10.4 introduced new, advanced color correction tools to this editing application, including color wheels, curves, and hue vs. saturation curves. These are tools that users of other NLEs have enjoyed for some time – and, which were part of Final Cut Studio (FCP 7, Color). Like others, my first reaction was, “Super! They’ve added some nice advanced tools, which will improve the use of FCPX for higher-end users.” But, as I started to primarily use the Color Wheels with real correction work, I quickly realized that something wasn’t quite right in how they operated. Or at least, they didn’t work in a way that we’ve come to understand.

In trying to figure it out, I reached out to other industry pros and developers for their thoughts. Naturally this led to some spirited discussions at forums like those at Creative COW. However, other editors have noticed the same problems, so you can also find threads in the Facebook FCPX group and at FCP.co. It is certainly easy to characterize this as just another internet kerfuffle, surrounding Apple’s “think different” approaches to FCPX. But those arguments fall flat when you actually try to use the tools as intended.

The FCPX Color Wheels panel includes four wheels – Master, Shadows, Midtones, and Highlights. The puck in the center of each wheel is a hue offset control to push hues in the direction that you move the puck. The slider to the right of the wheel controls the brightness of that range. The left slider controls the saturation. One of the main issues is that when you adjust luminance using one of these controls, the affected range is too broad. Specifically, in the case of the Midtones control, as you adjust the luminance slider up or down, you are affecting most of the image and not just the midrange levels. This is not the way this type of control normally works in other tools, and in fact, it’s not how FCPX’s Color Board controls work either.

“What’s the big deal?” you might ask. Fair enough. I see two operational issues. The first is that to properly grade the image using the Color Wheels, you end up having to go back-and-forth a lot between wheels, to counteract the changes made by one control with another. The second is that using the Midtones slider tends to drive highlights above 100 IRE, where they will be clipped if any broadcast limiting is used. This doesn’t happen with other color tools, notably Apple’s own Color Board.

A lot of the discussion focuses on luma levels and specifically the Midtones slider, since it’s easy to see the issue there. However, other controls are also affected, but that’s too much to dissect in a single post. Throughout this post, be sure to click on the images to see the full view. I have presented various samples against each other and you will only get the full understanding if you open the thumbnail (which is small but also cropped) to the full image. I have compared the effect using five different tools – the Color Board, the Color Wheels, a color corrector plug-in that I built as a Motion template using Motion effects, Rubber Monkey Software FilmConvert (the wheels portion only), and finally, the Adobe Lumetri controls in Premiere Pro.

I am using three different test images – a black-to-white ramp, a test pattern, and a demo video image. The ramp without correction will appear as a diagonal line (0-100 IRE) on the scope, which makes it easy to analyze what’s happening. The video image has definite shadow and highlight areas, which lets us see how these controls work in the real world. For example, if you want to brighten the area of the shot where the man is in the shadows, but don’t want to make the highlights any brighter, this would normally be done using a Midtones control. Be aware that these various tools certainly aren’t calibrated the same way and some have a greater range of control than others. The weakest of these is FilmConvert’s wheels, since this plug-in has additional level controls in other parts of its interface.

Color science models

In the various forum threads, the argument is made that Apple is simply using a different color science method or a different weighing of some existing models. That’s certainly possible, since not all color correctors are built the same way. The most common approaches are Lift/Gamma/Gain and Shadows/Mids/Highlights. Be careful with naming. Just because something uses the terminology of Shadows, Midtones, and Highlights, does not mean that it also uses the SMH color science model. Many tools use the Lift/Gamma/Gain model, but in fact, call the controls shadows (Lift), mids (Gamma), and highlights (Gain). Another term you may run across is Set-up in some correction tools. This is typically used for control of shadows (equal to Lift), but can also function is an offset control that raises the level of the entire image. Avid Symphony employs this solution. Finally, both Symphony and Adobe SpeedGrade use what has been dubbed a 12-way color corrector. Each range is further subdivided into its own subset of shadows, mids, and highlights controls.

An LGG model provides broad control of shadows and highlights, with the midtones control working like a curve that covers the whole range, but with the largest effect in the middle. An SMH model normally divides the levels into three distinct, precisely overlapping ranges. This is much like a three-band audio equalizing filter. A number of the color correctors add a luma range control, which gives the user the ability to change how much of the image a specific range will affect. In other words, how broad is the control of the shadows, mids, or highlights control? This is like a Q control in an audio equalizer, where you change the shape of the envelope at a certain frequency.

Red Giant’s Magic Bullet Looks offers both color correction models with two different tools – the 4-way color corrector (SMH) and the Colorista color corrector (LGG). When you adjust the midrange control of their 4-way, the result is a graceful S-shaped curve to the levels on the waveform.

To study the effect of an LGG-based corrector, test the ramp. The shadows control (Lift) will raise or lower the dark areas of the image without changing the absolute highlights. The diagonal line of the ramp on the waveform essentially pivots, hinged at the 100 IRE point. Conversely, change the highlights control (Gain) pivots the line pinned to 0 IRE (at black). When you adjust the midtones control (Gamma), you create a curve to the line, which stays pinned at 0 and 100 IRE at either end. In this way you are effectively “expanding” or “compressing” the levels in the middle portion of your image without changing the position of your black or white points.

How the various color correction tools react

Looking at the luma control for the Midtones, two things are clear. First, all of these tools are using the LGG color science model. It’s not clear what the Color Wheels are using, but it isn’t SMH, as there is no bulge or S-curve visible in the scope. Second, the Color Wheels quickly drive the image levels into clipping, while the other tools generally keep black and while levels in place. In essence, the Midtones control affects the image more like a master or offset control would, than a typical mids or Gamma control. Yet, clearly Apple’s Color Board controls adhere to the standard LGG model. The concern, of course, is clipping. In the test image of the man walking on the village street, the sunlit building walls on the opposite side of the street will become overexposed and risk being clipped when the Color Wheels are used.

What about color? As a simple test, I next shifted the Midtones puck to the yellow. Bear in mind that the range of each of these controls is different, so you will see varying degrees of yellow intensity. Nevertheless, the way the control should work is that some pure black and white should be preserved at the top and bottom of the video levels. All of these tools maintain that, except for the Color Wheels. There, the entire image is yellow, effectively making the hue offset puck function more like a tint control.

One other issue to note, is that the Color Wheels offer an extraordinarily control range. The hue offset control RGB intensity values go from 0 (center of the wheel) to 1023. However, the puck icon can only go to the rim of the wheel, which it hits at about 200. With a mouse (or numerical entry), you can keep going well past the stop of the wheel icon – five times farther, in fact. The image not only becomes very yellow in this case, but you can easily lose the location of your control, since the GUI position in no longer relevant.

The working theory

The big question is why don’t the Color Wheels conform to established principles, when in fact, the Color Board controls do? Until there is some further clarification from Apple, one possible explanation is with HDR. FCPX 10.4 introduced High Dynamic Range (HDR) features. One of the various HDR standards is Rec. 2020 PQ. In that color space, the 0-100 IRE limitations of Rec. 709 are expanded to 0-10,000 nits. 0-100 nits is roughly the same brightness as we are used to with Rec. 709.

Looking at this image of the man walking along the street – where I’ve attempted to get a pleasing look with all of the tools – you’ll see that the Color Wheels in Rec. 709 don’t react correctly and will drive the highlights into a range to be clipped. However, in the bottom pane, which is the same image in Rec. 2020 PQ color space, the grade looks pretty normal. And, in practice, the Color Wheels controls work more or less the way I would have expected them to work. Yes, the same controls work differently in the different color spaces – properly in 2020 PQ and not in 709.

But why is that the case? I have no answer, but I do have a wild guess. Maybe, just maybe, the Color Wheels were designed for – or intended to only be used for – HDR work. Or maybe there’s conversion or recalibration of the controls that hasn’t taken place yet in this version. If the tool is only calibrated for HDR, then its range and weighing will be completely wrong for Rec. 709 video. If you increase the Midtones luma of the ramp in both Rec. 709 and Rec. 2020 PQ, you’ll see a similar curve. In fact, if you overlay a screen shot of each waveform, placing the full Rec. 709 scope image over the bottom portion of the Rec. 2020 PQ scale, you’ll notice that these sort of align up to about 100 IRE and nits. It’s as if one is simply a slice out of the other.

Regardless of why, this is something where I would hope Apple will provide a white paper or other demonstration of what the best practices will be for using this tool effectively. If it isn’t intentional, and actually is a mistake, then I presume a fix will be forthcoming. In either case, put in your feedback comments to Apple.

A word about HDR

Over the course of testing this tool and this theory, I’ve done a bit of testing with the HDR color spaces in FCPX. If you want to know more about HDR, I would encourage you to check out these contrary blog posts by Stu Maschwitz and Alexis Van Hurkman. I tend to side with Stu’s point-of-view and am not a big fan of HDR.

The way Apple has implemented these features in Final Cut Pro X 10.4 is to allow the user to set and override color spaces. If you set up your project to be Rec. 2020 PQ (and set preferences to “show HDR as raw values”), then the viewer and a/v output (direct from the Mac, not through a hardware i/o device) are effectively dimmed through the Mac’s color profile system. When you grade the image based on the 0-10,000 nits scale, you’ll end up seeing an image that looks pleasing and essentially the same as if you were working in Rec. 709. However – and I cannot over-emphasize this – you are not going to be able to produce an image that’s truly compatible with Dolby Vision and actually look correct as HDR, unless you have the correct AJA i/o hardware and a proper display. And by display, I mean a top-end Dolby, Canon, or Sony unit, costing tens of thousands of dollars.

As I understand the PQ specs, the bulk of the higher range is for the highlights that are normally constrained or clipped in our current video systems. However, that 10,000 nits scale is weighed, so that about 50% of the image value is in the first 100 nits, making it of comparable brightness to the current 100 IRE. The rest of that range is for brighter information, like specular highlights. You don’t necessarily get more brightness in the shadow detail. Therefore, if you are grading a shot in FCPX in a 2020 PQ color space and you only have the computer display to go by, you’ll grade by eye as much as by scope. This means that to get a pleasing image, you will end up making the average appearance of the image brighter than it really should be. When this is viewed on a real HDR monitor, it will be painfully bright. Having a higher-nits computer display, like on the iMac Pro (up to 500 nits), won’t make much difference, unless maybe, you crank the display brightness to its maximum (ouch!).  “Mine goes the 11!”

Right now, HDR is the wild, wild west. If you are smart, you’ll realize that you don’t know what you don’t know. While it’s nice to have these new features in FCPX, they can be very dangerous in the wrong hands.

But that’s another matter. Right now, I just hope Apple (or one of the usual suspects, like Ripple Training, LumaForge, or Larry Jordan) will come out with more elaboration on the Color Wheels.

©2018 Oliver Peters

Chromatic

Since its introduction six years ago, Apple Final Cut Pro X has only offered the Color Board as its color correction/grading tool. That’s in addition to some automatic correction features and stylized “look” effects. The Color Board interface is based on color swatches and puck sliders, instead of traditional color wheels, leaving many users pining for something else. To answer this need, several third-party, plug-in developers have created color corrector effects modules to fill the void. The newest of these is Chromatic from Coremelt – a veteran Final Cut plug-in developer.

The toolset

Chromatic is the most feature-rich color correction module currently available for FCPX. It offers four levels of color grading, including inside and/or outside of a mask, overall frame, and also a final output correction. When you first apply the Chromatic Grade effect to a clip, you’ll see controls appear within the FCPX inspector window. These are the final output adjustments. To access the full toolset, you need to click on the Grade icon, which launches a custom UI. Like other grading tools that require custom interfaces, Chromatic’s grading toolset opens as a floating window. This is necessitated by the FCPX architecture, which doesn’t give developers the ability to integrate custom interface panels, like you’ll find in Adobe applications. To work around this limitation, developers have come up with various ingenious solutions, including floating UI windows, HUDs (heads up displays), and viewer overlays. Chromatic uses all of these approaches.

The Chromatic toolset includes nine correction effects, which can be stacked in any order onto a clip. These include lift/gamma/gain sliders, lows/mids/highs color wheels, auto white balance, replace color, color balance/temperature/exposure/saturation, three types of curves (RGB, HSL, and Lab), and finally, color LUTs. As you use more tools on a clip, these will stack into the floating window like layers. Click on any of these tools within the window to access those specific controls. Drag tools up or down in this window to rearrange the order of operation of Chromatic’s color correction processes. The specific controls work and look a lot like similar functions within DaVinci Resolve. This is especially true of HSL Curves, where you can control Hue vs. Sat or Hue vs. Luma.

Masking with the power of Mocha

Corrections can be masked, in order to effect only specific regions of the image. If you select “overall”, then your correction will affect the entire image. But is you select “inside” or “outside” of the mask, then you can grade regions of the image independent of each other. Take, for example, a common, on-camera interview situation with a darkened face in front of a brightly exposed exterior window. Once you mask around the face, you can then apply different correction tools and values to the face, as opposed to the background window. Plus, you can still apply an overall grade to the image, as well as final output adjustment tweaks with the sliders in the inspector window. That’s a total of four processes, with a number of correction tools used in each process.

To provide masking, Coremelt has leveraged its other products, SliceX and TrackX. Chromatic uses the same licensed Mocha planar tracker for fast, excellent mask tracking. In our face example, should the talent move around within the frame, then simply use the tracker controls in the masking HUD to track the talent’s movement within the shot. Once tracked, the mask is locked onto the face.

Color look-up tables (LUTs)

When you purchase Chromatic, you’ll also get a LUT (color look-up table) browser and a default collection of looks. (More looks may be purchased from Coremelt.) The LUT browser is accessible within the grading window. I’m not a huge fan of LUTs, as these are most often a very subjective approach to a scene that simply doesn’t work with all footage equally well. All “bleach bypass” looks are not equal. Chromatic’s LUT browser also enables access to any other LUTs you might have installed on your system, regardless of where they came from, as long as they are in the .cube format.

LUTs get even more confusing with camera profiles, which are designed to expand flat-looking, log-encoded camera files into colorful Rec709 video. Under the best of circumstances these are mathematically correct LUTs developed by the camera manufacturer. These work as an inverse of the color transforms applied as the image is recorded. But in many cases, commonly available camera profile LUTs don’t come from the manufacturers themselves, but are actually reverse-engineered to function closely to the manufacturer’s own LUT. They will look good, but might not yield identical results to a true camera LUT.

In the case of FCPX, Apple has built in a number of licensed camera manufacturer LUTs for specific brands. These are usually auto-detected and applied to the footage without appearing as an effect in the inspector. So, for instance, with ARRI Alexa footage that was recorded as Log-C, FCPX automatically adds a LogC-to-Rec709 LUT. However, if you disable that and then subsequently add Chromatic’s LogC-to-Rec709 LUT, you’ll see quite a bit of difference in gamma levels. Apple actually uses two of these LUTs – a 2D and a 3D cube LUT. Current Alexa footage defaults to the 3D LUT, but if you change the inspector pulldown to the regular LogC LUT, you’ll see similar gamma levels to what Chromatic’s LUT shows. I’m not sure if the differences are because the LUT isn’t correct, or whether it’s an issue of where, within the color pipeline, the LUT is being inserted. My recommendation is to stick with the FCPX default camera profile LUTs and then use the Chromatic LUTs for creative looks.

In use

Chromatic is a 1.0 product and it’s not without some birthing issues. One that manifested itself is a clamping issue with 2013 Mac Pros. Apparently this depends on which model of AMD D-series GPU your machine has. On some machines with the D-500 chips, video will clamp at 0 and 100, regardless of whether or not clamping has been enabled in the plug-in. Coremelt is working on a fix, so contact them for support if you have this or other issues.

Overall, Chromatic is well-behaved as custom plug-ins go. Performance is good and rendering is fast. Remember that each tool you use on a clip is like adding an additional effects filters. Using all nine tools on a clip is like applying nine effects filters. Performance will depend on a lot of circumstances. For example, if you are working with 4K footage playing back from a fast NAS storage system, then it will take only a few applied tools before you start impacting performance. However, 1080p local media on a fast machine is much more forgiving, with very little performance impact during standard grading using a number of applied tools.

Coremelt has put a lot of work into Chromatic. To date, it’s the most comprehensive grading toolset available within Final Cut Pro X. It is like having a complete grading suite right inside of the Final Cut timeline. If you are serious about grading within the application and avoiding a roundtrip through DaVinci Resolve, then Chromatic is an essential plug-in tool to have.

©2017 Oliver Peters

Blackmagic Design DaVinci Resolve Panels

I started my editing career in the era of linear editing suites, where dedicated control panels ruled. CMX keyboards, Grass Valley switchers, ADOs – you name it. These enabled operational speed and experienced editors could drive these rooms like a virtuoso pianist. Much of that dexterity has been lost, thanks to the ubiquity of software-based user interfaces for applications running on general purpose computers and controlled by a mouse. But Grant Petty and Blackmagic Design have set out to change that. At the beginning of March, he introduced two new color correction control panels as companion tools to the company’s DaVinci Resolve editing and grading solution. According to Petty more people are using Resolve to edit than to color correct. By introducing these new panels, he hopes to get more of these users involved in the color correction side of Resolve.

Blackmagic Design now offers three DaVinci Resolve panels: Advanced ($29,995), Mini ($2,995) and Micro ($995). Obviously, the Advanced panel is for serious, dedicated color correction facilities with the traffic to support that investment. It’s a large, three-module console with four trackball/ring controls in the center section. The Mini and Micro panels are designed to be more portable than the Advanced panel. The Mini is essentially a three-trackball subset of the center section of the larger panel. The Micro is the trackball section of the Mini, without the Mini’s tilted backplane. If you are an editor who uses Resolve for color correction, but that’s less than 50% of your workload, then the Micro is probably the right panel for you. If you color correct more than 50%, then the Mini is the better bet. However, these panels are designed for more than just editors. If you work as a DIT (digital imaging technician) in the field or on-set, you most likely use Resolve, making these panels the perfect addition to your toolkit.

Taking the Mini for a spin

Blackmagic Design loaned me a Resolve Mini panel for about two weeks for this review. I have to say, it was love at first sight. These panels continue with Blackmagic’s modern industrial design style. This has earned them an international Design Team of the Year award from the Red Dot Awards last year. The Mini panel is a well-constructed metal console with precision trackballs, rings, knobs and buttons. (The panel also uses some high-impact plastic in its construction.) With packaging, it weighs 24 pounds, thus it’s more “transportable” than portable. If you want something to toss into a gig bag, then the Micro would be the panel to buy. The Mini is better for facility use; however, it’s easy enough to move between rooms as needed.

The smaller Micro is bus-powered over USB, but the Mini includes several connection and power options. Communications can be over ethernet or USB/USB-C. Power options include standard AC wall power, 12 volt 4-pin, or ethernet PoE. Like other Blackmagic Design products, you have to supply your own power chord, but the Mini does include a USB-to-USB-C adapter chord. To run the panel, you need to install Resolve Studio (paid) or Resolve (free), version 12.5.5 or later. And yes, these panels only work with Resolve. Connection is drop-dead easy. Just power it up and plug in the USB cable to any available USB port on your computer (or looped off of a connected device, like a monitor). Then select the panel in Resolve’s preferences. This ease of installation is refreshing, without any of the finickiness of other protocols, like EUCON. The one downside for editors is that this panel only controls the color mode of Resolve. There are no dedicated controls for editing, importing or exporting. So you won’t be able to shed the keyboard and mouse completely.

Everything at your fingertips

The main section of the panel includes three trackballs for hue control and rings for luminance control. Generally these correspond to shadow, mids and highlight ranges of the image. Across the top of this flat section are twelve knobs for additional color controls. Push in the knobs to reset their adjusted values. On the right are buttons to move through nodes, clips and stills, along with play/stop buttons. The slanted backplane of the Mini panel features two five-inch, high-resolution LCD menu/control displays, fifteen buttons on either side, eight soft keys across the top, and eight knobs under the displays. The buttons on the left select the portion of the interface that you need to deal with, like primary correction, tracking, sizing, blurs, etc. The buttons on the right are to add nodes, copy and paste, move through stills and keyframes, and toggle the computer display to a full screen viewer.

Resolve’s primary color correction window is pretty deep, requiring paging through different sections of the control window, such as primary bars, primary wheels, log, raw and more. There’s actually a fourth control wheel for offset in addition to lows, mids and highs. Much of this is exposed to the panel. For example, you can use the knobs to adjust the primary bars, while also moving the trackballs, which would normally adjust the primary wheels. Across the bottom of Resolve’s primary window are additional controls for contrast, saturation and more, which spread across two pages of that interface window. These controls are all active on the Mini by using the twelve knobs located above the trackballs. In some cases, you’ll need to change the part of the interface that appears on the two LCDs. This is enabled by the two arrow keys in the upper left corner of the panel. However, switching pages on the panel is required less often than when you only use the mouse with the interface.

The offset function (the fourth primary wheel and fourth trackball on the Advanced panel) can be accessed by selecting the offset key located above the middle trackball. In that mode, the left ring controls temperature, middle ring controls tint and right ring controls level. The right trackball controls color balance.

Resolve is built around controls that may or may not be present in other applications. For example, it is designed as a YRGB system, meaning you can gang level and color controls, but can also correct Y (luminance) lift/gamma/gain levels independent of color (RGB). In addition to standard three-wheel color corrections, you also have contrast/pivot control, as well as some photographic-style enhancements. These include color boost (like a vibrance control), mid detail (softens or sharpens the image), plus blurs. In you are using Resolve Studio, then temporal noise reduction is active. From what I can tell, this is the only control not active when using the panel with the free version of Resolve.

Resolve uses an elaborate curves system, which you would think would be difficult to implement with knobs and buttons. However, Blackmagic has done a wonderful job. The normal curve levels (ganged or independent channels) can be adjusted by six of the knobs under the LCD displays. These work at preset intervals of 0, 20, 40, 60, 80 and 100% along the curve path from dark to light. If you use hue curves, you start with one of six preset colors selected from the panel. Then an “input hue” knob lets you change the selected color left or right within its hue range, based on the last color knob selected. Custom curves also offer a YSFX tool. This is an adjustment to shrink and even invert the curve range. The extreme opposite setting results in a negative image.

There are plenty of other tools. Resolve has a powerful point-cloud tracker, which can also be accessed from the Mini. One handy feature is the ability to automatically add a node with a preset box or circle window. Once applied, then you adjust the window. Although you can step through keyframes, it still requires the mouse to add or delete keyframes. You also have to delete nodes via mouse and not from the panel. Some keys, like FX and User are available for future expansion.

In practice

I spent about a week with the panel, working on and off with some test projects. Needless to say, I enjoyed the process, but there are a few things I wish were different.  The Mini panel is really designed for full-time color grading. If you have a desk layout for editing, then there probably isn’t enough extra space to situate the Mini is an optimal location. For instance, if you wanted to place the panel between your keyboard and display, then the Micro would be a better option. There is no power switch, so the panel is always on. Fortunately, it’s fan-less and quiet, even when on. There are no illumination controls for the displays or the backlit keys. That’s fine in a normally lit room, but might be too bright for some, if you keep the light level very low in the suite.

I’d like to see more versatile transport control. Resolve supports faster-than-real-time playback and scrubbing, but the control panel only gives you 1X play in the forward or reverse directions. It would be nice to have better transport control from the panel. Resolve functions, like adding LUTs, can’t be handled from the panel. The controls to select HSL qualifiers for secondary color correction include eyedroppers, but you still need to use the mouse to graphically pick the right area of the screen. It would be nice if you could do this with the trackball. These are minor points and by no means deal breakers.

A dedicated color correction panel will not only make you a faster colorist – it will also make you a better one. More controls are front and center, which means you are likely to discover and use processes that you would otherwise miss if you simply relied on the mouse or a pen and tablet. You have two hands to control the panel. As with any other tactile task, such as audio mixing with a mixing board, your hands will soon know instinctively what to adjust without having to look at the panel. You can stay more focused on your video display and the scopes. Grading is not only faster, but it’s more intuitive.

Some are going to baulk at the price, no matter how reasonable these portable panels are. To place that into context, at $2,995, the Mini is still less expensive than a decked out Mac Pro or MacBook Pro, which might be your main editing/grading workstation. Plus they work with the free version of Resolve. So if color correction is part of your business model and Resolve is your color correction tool of choice, then either of these two DaVinci Resolve panels is easily justified. The more I’ve been using the Resolve Mini, the more I like it. It’s the Porsche of small grading control panels – solid, stylish and powerful.

Originally written for Digital Video magazine / Creative Planet Network

©2017 Oliver Peters

More LUTs from IWLTBAP

df1316_iwltbap_1

With more cameras shooting in some form of a log or flat color profile and more editing software being able to integrate color look-up tables (LUTs), numerous developers have designed their own LUT packages. Some, like Koji, strive to duplicate the colorimetry of certain film stocks, while others, such as SpeedLooks from LookLabs, create stylized “look” files that give you a range of creative color correction choices.

One new developer offering a package of easy to use LUTs is French filmmaker IWLTBAP. Through the website, you can pick up a comprehensive package of LUTs in the 32x32x32 .cube format, which are compatible with most modern editing and compositing software applications. If you edit in Adobe Premiere Pro CC, the Lumetri Color panel lets you browse and add any .cube LUTs you’ve saved on your hard drives. If you cut in Apple Final Cut Pro X, then the addition of a LUT plug-in, like Color Grading Central’s LUT Utility, enables you to add third-party LUTs to any clip on the timeline.df1316_iwltbap_4

I took these LUTs for a spin and like most LUT packages, they come in a groups. First you have Utility LUTs, which are designed to convert color spaces from log to Rec709 (the standard video color space) or in the opposite direction. These are organized by camera type, since not all manufacturers use the same logarithmic values. Then the color correction or “look” LUTs are grouped into Standard and Log versions.

The Standard LUTs are to be applied to images that are already in Rec709 color space, while the Log versions can be used as a one-step LUT to be applied to generic log images. For example, you could apply both a Log-to-Rec709 Utility LUT and a second LUT from the Standard group to achieve your result. Or simply apply the single Log version to that same clip and end up with similar results. The dual-LUT approach gives you more incremental control over the Log conversion based on camera models, whereas the single-step solution is designed for generic log images. However, both can yield the desired grade, depending on the clip. In addition to the paid LUT package, IWLTBAP offers two Bonus LUTs, which are available as a free download from the website.

df1316_iwltbap_2There are over 80 LUTs in each group and these are organized by color style and number. The numbers don’t really mean anything. In other words, they aren’t an attempt to mimic a film stock number. As you ascend in numbers, the next step is a more aggressive or somewhat different version of the previous. The key is the prefix and suffix for each. These LUT files carry a STD or LOG suffix so you know whether these are from the Log or Standard group. Then there’s a prefix: C for cold, H for hot, W for warm, F for film, and X for creative. Each style has several variations within that general look. For example, the LUT file labelled “F-9490-STD.cube” is a LUT with a filmic curve designed for a Rec709 image.

df1316_iwltbap_7When working with LUTs, it’s often hard to know what result you get until you try it. Then if you don’t like the look, you have to continue to slowly browse through your LUT files – applying each, one at a time – until you get the right look. Often that can lead to a lot of trial and error. The IWLTBAP package ships with lightweight Windows and Mac preview applications, however, the developer warns of some occasional instability on some machines. The easiest solution is to use their web-based LUT previewer. Simply upload a reference JPEG from your clip and then toggle through the LUTs to preview how those will affect the shot.

df1316_iwltbap_6I ran some tests on Blackmagic Design camera footage in both FCPX and Premiere Pro CC and got some really pleasing results. In the case of FCPX, if you use LUT Utility, you have to copy the .cube files into LUT Utility’s Motion Templates folder. This is found under Effects/CGC. Files stored there become visible in the LUT Utility pulldown menu. Note that only the first 50 or so files in that folder can be accessed, so be selective. If you apply two instances of the LUT Utility to a clip, then you can apply a Log-to-Rec709 conversion in the first and then the creative look LUT in the second. This plug-in has a mix slider, so you can adjust the intensity of the LUT to taste. As an effects plug-in, you can also place other effects, such as color correction in-between the two LUT Utility effects as part of that stack of effects. Doing this gives you nice control over color within FCPX with very little overhead on the application’s performance.

df1316_iwltbap_3If you are an FCPX user that has adopted Color Grading Central’s ColorFinale grading tool as your go-to color correction plug-in, then all of this LUT management within the application can be simply handled from the ColorFinale interface itself. Stack layers of LUTs and other color tools all inside the ColorFinale panel. LUT choices can be added or removed using the integrated LUT Manager and then relaunching FCPX to activate them as part of ColorFinale.

If you are a Premiere Pro CC editor, then the latest version was enhanced with the Lumetri Color panel. This control is organized as a stack of color modules, which include two entry points to add a LUT – in the Basic and the Creative tabs. In my testing of the new URSA footage, I applied a Log-to-Rec709 LUT for the URSA in Basic and then one the “look” LUTs, like the free Aspen standard version, in Creative. You still have all the other color control in the Lumetri panel to fine-tune these, including the intensity level of the LUT.

df1316_iwltbap_5LUTs are a creative tool that should be thought of as a stylistic choice. They aren’t an instant fix and shouldn’t be the only tool you use to color correct a clip. However, the LUTs from IWLTBAP provide a good selection of looks and moods that work well with a wide range of shots. Plus the package is very affordable and even more so if you get it after reading this blog! Readers who are interested can get 25% off of the retail price using the discount code DIGITALFILMS. Or by using this direct link.

Last but not least, check out the free, downloadable 4K film grain clip. It’s a ten second ProRes file that can be overlaid or blended to add grain to your shot.

©2016 Oliver Peters