Amira Color Tool and your NLE

df_amiracolor_1I was recently alerted to the new Amira Color Tool by Michael Phillips’ 24p blog. This is a lightweight ARRI software application designed to create custom in-camera looks for the Amira camera. You do this by creating custom color look-up tables (LUT). The Amira Color Tool is available as a free download from the ARRI website (free registration required). Although the application is designed for the camera, you can also export looks in a variety of LUT file formats, which in turn, may be installed and applied to footage in a number of different editing and color correction applications. I tested this in both Apple Final Cut Pro X and Avid Media Composer | Software (v8) with good results.

The Amira Color Tool is designed to correct log-C encoded footage into a straight Rec709 offset or with a custom look. ARRI offers some very good instructions, white papers, sample looks and tutorials that cover the operation of this software. The signal flow is from the log-C image, to the Rec709 correction, and then to the CDL-based color correction. To my eye, the math appears to be floating point, because a Rec709 conversion that throws a shot into clipping, can be pulled back out of clipping in the look tab, using the CDL color correction tools. Therefore it is possible to use this tool for shots other than ARRI Amira or Alexa log-C footage, as long as it is sufficiently flat.

The CDL correction tools are based on slope, offset and power. In that model slope is equivalent to gain, offset to lift and power to gamma. In addition to color wheels, there’s a second video look parameters tab for hue intensities for the six main vectors (red, yellow, green, cyan, blue and magenta). The Amira Color Tool is Mac-only and opens both QuickTime and DPX files from the clips I tested. It worked successfully with clips shot on an Alexa (log-C), Blackmagic Cinema Camera (BMD Film profile), Sony F-3 (S-log) and Canon 1DC (4K Canon-log). Remember that the software is designed to correct flat, log-C images, so you probably don’t want to use this with images that were already encoded with vibrant Rec709 colors.

FCP X

df_amiracolor_4To use the Amira Color Tool, import your clip from the application’s file browser, set the look and export a 3D LUT in the appropriate format. I used the DaVinci Resolve setting, which creates a 3D LUT in a .cube format file. To get this into FCP X, you need to buy and install a LUT filter, like Color Grading Central’s LUT Utility. To install a new LUT there, open the LUT Utility pane in System Preferences, click the “+” symbol and navigate to where the file was saved.df_amiracolor_5_sm In FCP X, apply the LUT Utility to the clip as a filter. From the filter’s pulldown selection in the inspector, choose the new LUT that you’ve created and installed. One caveat is to be careful with ARRI files. Any files recorded with newer ARRI firmware are flagged for log-C and FCP X automatically corrects these to Rec709. Since you don’t want to double up on LUTs, make sure “log processing” is unchecked for those clips in the info tab of the inspector pane.

Media Composer

df_amiracolor_6_smTo use the custom LUTs in Media Composer, select “source settings” for the clip. Go to the color management tab and install the LUT. Now it will be available in the pull-down menu for color conversions. This color management change can be applied to a single clip or to a batch of clips within a bin.

In both cases, the source clips in FCP X and/or Media Composer will play in real-time with the custom look already applied.

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©2014 Oliver Peters

Comparing Color, Resolve, SpeedGrade and Symphony

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It’s time to talk about color correctors. In this post, I’ll compare Color, Resolve, SpeedGrade and Symphony. These are the popular desktop color correction systems in use today. Certainly there are other options, like Filmlight’s Baselight Editions plug-in, as well as other NLEs with their own powerful color correction tools, including Autodesk Smoke and Quantel Rio. Some of these fall outside of the budget range of small shops or don’t really provide a correction workflow. For the sake of simplicity, in this post I’ll stick with the four I see the most.

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Avid Technology Media Composer + Symphony

Although it started as a separate NLE product with dedicated hardware, today’s Symphony is really an add-on option to Media Composer. The main feature that differentiates Symphony from Media Composer in file-based workflows is an enhanced color correction toolset. Symphony used to be the “gold standard” for color correction within an NLE, combining controls “borrowed” from many other software and systems, like Photoshop, hardware proc amps and hardware versions of the DaVinci correctors. It was the first to use the color wheel control model for balance/hue offsets. A subset of the Symphony tools has been migrated into Media Composer. Basic correction features in Symphony include channel mixing, hue offsets (color balance), levels, curves and more.

Many perceive Symphony correction as a single level or layer of correction, but that’s not exactly true. Color correction occurs on two levels – segment and program track. Most of your correction is on individual clips and Symphony offers a relational grading system. This means you can apply grades based on single clips or all instances of a master clip, tape ID, camera, etc. All clips used from a common source can be automatically graded once the first instance of that clip is graded on the timeline. The program track grade allows the colorist to apply an additional layer of grading to a clip, a section of the timeline or the entire timeline. So, when the client asks for everything to be darker, a global adjustment can be made using the program track.

Symphony also offers secondary grading based on isolating colors via an HSL key and adjusting that range. Although Symphony doesn’t offer nodes or correction layers like other software, you can use Avid’s video track timeline hierarchy to add additional correction to blank tracks above those tracks containing the video clips. In this way you are using the tracks as de facto adjustment layers. The biggest weakness is the lack of built-in masking tools to create what is commonly referred to as “power windows” (a term originated by DaVinci). The workaround is to use Avid’s built-in Intraframe/Animatte effects tools to create masks. Then you can apply additional spot correction within the mask area. It takes a bit more work than other tools, but it’s definitely possible. Finally, many plug-in packages, like GenArts Sapphire, Boris Continuum Complete and Magic Bullet Looks include vignette filters that will work with Symphony.

The bottom line is that Symphony started it all, though by today’s standards is “long-in-the-tooth”. Nevertheless, the relational grading model – and the fact that you are working within the NLE and can freely move between color correction and editing/trimming – makes Symphony a fast unit to operate, especially in time-sensitive, long-form productions, like TV shows.

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Adobe SpeedGrade CC

If you are current as a Creative Cloud subscriber, then you have access to the most recent version of Adobe Premiere Pro CC and SpeedGrade CC. With the updates introduced late last year, Adobe added Direct Link interaction between Premiere Pro and SpeedGrade. When you use Direct Link to send your Premiere Pro timeline to SpeedGrade, the actual Premiere Pro sequence becomes the SpeedGrade sequence. This means codec decoding, transitions and Premiere Pro effects are handled by Premiere Pro’s effects engine, even though you are working inside SpeedGrade. As such, a project created via Direct Link supports features and codecs that would not be possible within a standalone SpeedGrade project.

Another unique aspect is that native and third-party transitions and effects used in Premiere Pro are visible (though not adjustable) when you are working inside SpeedGrade. This is an important distinction, because other correction workflows that rely on roundtrips don’t include NLE-based filters. You can’t see how the correction will be affected by a filter used in the NLE timeline. Naturally, in the case of SpeedGrade, this only works if you are working on a machine with the same third-party filters installed. When you return to Premiere Pro from SpeedGrade, the color corrections on clips are collapsed into a Lumetri filter effect that is applied to the clip or adjustment layer within the Premiere Pro sequence. Essentially this Lumetri effect is similar to a LUT that encapsulates all of the grading layers applied in SpeedGrade into a single effect in Premiere Pro. This is possible because the two applications share the same color science. The result is a render-free workflow with the easy ability to go back-and-forth between Premiere Pro and SpeedGrade for changes and adjustments. Unlike a standard LUT, Lumetri filters can carry masks, keyframes and are 100% precise.

As a color corrector, SpeedGrade is designed with a layer-based interface, much like Photoshop. Layers can be primary (fullscreen), secondary (keys and masks) or filters. A healthy selection of effects filters and LUTs are included. The correction model splits the signal into what amounts to a 12-way color wheel arrangement. There are lift/gamma/gain controls for the overall image, as well as for each of the shadow, middle and highlight ranges. Controls can be configured as wheels or sliders, with additional sliders for contrast, pivot, temperature (red vs. blue bias), magenta (red/blue vs. green bias) and saturation. There are no curves controls.

Overall, I like the looks I get with SpeedGrade, but I find it lacking in some ways. There are definite plusses and minuses. I miss the curves. It currently does not work with Blackmagic Design hardware. Matrox, Bluefish and AJA are OK. It’s got a tracker, but I find both tracking and masking to be mediocre. The biggest workflow shortcoming is the lack of a temporary memory register feature. You can save a whole grade, which saves the entire stack of grading layers applied to a clip as a Lumetri filter. You can apply grades from earlier timeline clips quite simply and SpeedGrade lets you open multiple playheads for comparison/correction between multiple shots on the timeline. You can access the nine grades ahead and the nine grades beyond the current playhead position. You can also copy the grade from the clip below mouse position to the clip under the playhead by pressing the C key. What you cannot do is store a random set of grades or just a single layer in a temporary buffer and then apply it from that buffer somewhere else in the timeline. Adding these two items would greatly speed up the SpeedGrade workflow.

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Blackmagic Design DaVinci Resolve

The DaVinci name is legendary among color correction products, but that reputation was earned with its hardware products, like the DaVinci 2K. Resolve was the software-based product built around a Linux cluster. When Blackmagic bought the assets and technology of DaVinci, all of the legacy hardware products were dropped, in favor of concentrating on Resolve as the software that had the most life for the future. There are now four versions, including Resolve Lite (free), Resolve (paid – software only), Resolve with a Blackmagic control surface and Resolve for Linux. The first three work on Mac and PC. You may download the free Lite version from the Blackmagic website or Apple’s Mac App Store. The Lite version has nearly all of the power of the paid software, but with these limitations: noise reduction, stereoscopic tools and the ability to output at a resolution above UltraHD requires a paid version.

I’m writing this based on Resolve 10, which has rudimentary editing features. It is designed as a standalone color corrector that can be used for some editing. Blackmagic Design doubled-down on the editing side with Resolve 11 (shown at NAB 2014). When that’s finally released this summer, you’ll have a powerful NLE built into the application. The demos at NAB were certainly impressive. If that turns out to be the case, Resolve 11 would function as an Avid Symphony or Quantel Rio type of system. That means you could freely move between creative editing and color correction, simply by changing tabs in the interface. For now, Resolve 10 is mainly a color corrector, with some very good roundtrip and conforming support for other NLEs. Specifically there is very good support for Avid and FCP X workflows.

As a color corrector, Resolve offers the widest set of correction tools of any of these systems. In the work I’ve done, Resolve allows for more extreme grading and is more precise when trying to correct problem shots. I’ve done corrections with it that would have been impossible with any other tool. The correction controls include curves, wheels, primary sliders, channel mixers and more. Corrections are node-based and can be applied to clips or an entire track. Nodes can be applied in a serial or parallel fashion, with special splitter/combiner and layer mixing nodes. The latter includes Photoshop-style blend modes. Unlike SpeedGrade, you can store the value of a single node in a buffer (using the keyboard copy function) and then paste the value of just that node somewhere else. This makes it pretty fast when working up and down a timeline. Finally, the tracker is amazing.

A few things bother me about Resolve, in spite of its powerful toolset. The interface almost presents too many tools and it becomes very easy to lose track of what was done and where. There is no large viewer or fullscreen mode that doesn’t hide the node tree. This forces a lot of toggling between workspace configurations. If you have two displays, you cannot use the second display for anything other than the scopes and audio mixer. (This will change with Resolve 11.) Finally, you can only use Blackmagic Design hardware to view the video output on a grading monitor.

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Apple Color

Some of you are saying, “Why talk about that? It was killed off a few years ago! Who uses that anymore?” Yes, I know. What people so quickly forget, was that when the software was FinalTouch (before Apple’s purchase), it was very expensive and considered to be very innovative. Apple bought it, added some features and cleaned up some of the workflow. As part of Final Cut Studio, it set the standard for round-tripping with an NLE. Unfortunately for many Mac users, it retained its less glossy, “Unixy” interface and thus, didn’t really catch on for many editors. However, it still works just fine on the newest machines and OS versions and remains a fast, high-quality color corrector.

Nearly all of the long-form jobs I’ve done – including feature films and TV shows up to even a few months ago – have been done with Color. There are two reasons that I prefer it. The first is that most of these jobs were cut using FCP 7, so it’s still the most integrated software for these projects. More importantly, there are several key features that make it faster than SpeedGrade and Resolve for projects that fall within a standard range of grading. In other words, the in-camera look was good and there were no huge problem areas, plus the desired grade didn’t swing into extreme looks.

Color is designed with 10 levels of grading per clip – primary in, eight secondaries and primary out. Since secondaries can be fullscreen or a portion of the image qualified by an HSL key or mask, each secondary layer can actually have two corrections – inside and outside of the mask. In addition to these, there’s a ColorFX layer for node-based filter effects, which can also include color adjustments. In reality, the maximum number of corrections to a single clip could be up to 19. The primary corrections can include value changes for RGB lift/gamma/gain and saturation levels, as well a printer lights. On top of this are lift/gamma/gain color wheels and luma controls. Lastly there are curves. The secondaries include custom mask shapes and hue/sat/luma curves. There’s a tracker, too, but it’s not that great.

Where Color still shines for me is in workflow. Each layer is represented by a labelled bar on the timeline under the clip. This makes it easy to apply only a single secondary adjustment to other clips on the timeline simply by sliding the corresponding secondary bar from one timeline clip to one or more of the others. For example, I used Secondary 3 to qualify a person’s face and brighten it. I could then simply drag the bar for S3 that appears under the first clip on the timeline over to every other clip with the same person and similar set-up. All without selecting each of these clips prior to applying the adjustment.

Color works with all cards that work with Final Cut Pro, so there’s no AJA versus Blackmagic issue as mentioned above. Dual monitors work well. You can have scopes and the viewer (or a fullscreen viewer) on one display and the full control interface on the other. Realistically, Color works best with up to 2K video and one of the standard Apple codecs (uncompressed or ProRes work best). A lot of the footage I’ve graded with it was ProResHQ or ProRes 4444 that came native from an ARRI Alexa or transcoded from a C300, RED or a Canon 5D/7D. But I’ve also done a film that was all native EX rewrapped as .mov from a Sony camera and Color had no issues. Log-profile footage grades very nicely in Color, so Alexa ProRes 4444 encoded as Log-C forms a real sweet spot for Apple Color.

©2014 Oliver Peters

NAB 2014 Thoughts

Whodathunkit? More NLEs, new cameras from new vendors and even a new film scanner! I’ve been back from NAB for a little over a week and needed to get caught up on work while decompressing. The following are some thoughts in broad strokes.

Avid Connect. My trip started early with the Avid Connect costumer event. This was a corporate gathering with over 1,000 paid attendees. Avid execs and managers outlined the corporate vision of Avid Everywhere in presentations that were head-and-shoulders better than any executive presentations Avid has given in years. For many who attended, it was to see if there was still life in Avid. I think the general response was receptive and positive. Avid Everywhere is basically a realignment of existing and future products around a platform concept. That has more impact if you own Avid storage or asset management software. Less so, if you only own a seat of Media Composer or ProTools. No new software features were announced, but new pricing models were announced with options to purchase or rent individual seats of the software – or to rent floating licenses in larger quantities.

4K. As predicted, 4K was all over the show. However, when you talked to vendors and users, there was little clear direction about actual mastering in 4K. It is starting to be a requirement in some circles, like delivering to Netflix, for example; but for most users 4K stops at acquisition. There is interest for archival reasons, as well as for reframing shots when the master is HD or 2K.

Cameras. New cameras from Blackmagic Design. Not much of a surprise there. One is the bigger, ENG-style URSA, which is Blackmagic’s solution to all of the add-ons people use with smaller HDSLR-sized cameras. The biggest feature is a 10” flip-out LCD monitor. AJA was the real surprise with its own 4K Cion camera. Think KiPro Quad with a camera built around it. Several DPs I spoke with weren’t that thrilled about either camera, because of size or balance. A camera that did get everyone jazzed was Sony’s A7s, one of their new Alpha series HDSLRs. It’s 4K-capable when recorded via HDMI to an external device. The images were outstanding. Of course, 4K wasn’t everywhere. Notably not at ARRI. The news there is the Amiraa sibling to the Alexa. Both share the same sensor design, with the Amira designed as a documentary camera. I’m sure it will be a hit, in spite of being a 2K camera.

Mac Pro. The new Mac Pro was all over the show in numerous booths. Various companies showed housings and add-ons to mount the Mac Pro for various applications. Lots of Thunderbolt products on display to address expandability for this unit, as well as Apple laptops and eventually PCs that will use Thunderbolt technology. The folks at FCPworks showed a nice DIT table/cart designed to hold a Mac Pro, keyboard, monitoring and other on-set essentials.

FCP X. Speaking of FCP X, the best place to check it out was at the off-site demo suite that FCPworks was running during the show. The suite demonstrated a number of FCP X-based workflows using third-party utilities, shared storage from Quantum and more. FCP X was in various booths on the NAB show floor, but to me it seemed limited to partner companies, like AJA. I thought the occurrences of FCP X in other booths was overshadowed by Premiere Pro CC sightings. No new FCP X feature announcements or even hints were made by Apple in any private meetings.

NLEs. The state of nonlinear editing is in more flux than ever. FCP X seems to be picking up a little steam, as is Premiere Pro. Yet, still no clear market leader across all sectors. Autodesk announced Smoke 2015, which will be the last version you can buy. Following Adobe’s lead, this year they shift to a rental model for their products. Smoke 2015 diverges more from the Flame UI model with more timeline-based effects than Smoke 2013. Lightworks for the Mac was demoed at the EditShare booth, which will make it another new option for Mac editors. Nothing new yet out of Avid, except some rebranding – Media Composer is now Media Composer | Software and Sphere is now Media Composer | Cloud. Expect new features to be rolled in by the end of this year. The biggest new player is Blackmagic Design, who has expanded the DaVinci Resolve software into a full-fledged NLE. With a cosmetic resemblance to FCP X, it caused many to dub it “the NLE that Final Cut Pro 8 should have been”. Whether that’s on the mark or just irrational exuberance has yet to be determined. Suffice it to say that Blackmagic is serious about making it a powerful editor, which for now is targeted at finishing.

Death of i/o cards. I’ve seen little mention of this, but it seems to me that dedicated PCIe video capture cards are a thing of the past. KONA and Decklink cards are really just there to support legacy products. They have less relevance in the file-based world. Most of the focus these days is on monitoring, which can be easily (and more cheaply) handled by HDMI or small Thunderbolt devices. If you looked at AJA and Matrox, for example, most of the target for PCIe cards is now to supply the OEM market. AJA supplies Quantel with their 4K i/o cards. The emphasis for direct customers is on smaller output-only products, mini-converters or self-contained format converters.

Film. If you were making a custom, 35mm film scanner – get out of the business, because you are now competing against Blackmagic Design! Their new film scanner is based on technology acquired through the purchase of Cintel a few months ago. Now Blackmagic introduced a sleek 35mm scanner capable of up to 30fps with UltraHD images. It’s $30K and connects to a Mac Pro via Thunderbolt2. Simple operation and easy software (plus Resolve) will likely rekindle the interest at a number of facilities for the film transfer business. That will be especially true at sites with a large archive of film.

Social. Naturally NAB wouldn’t be the fun it is without the opportunity to meet up with friends from all over the world. That’s part of what I get out of it. For others it’s the extra training through classes at Post Production World. The SuperMeet is a must for many editors. The Avid Connect gala featured entertainment by the legendary Nile Rodgers and his band Chic. Nearly two hours of non-stop funk/dance/disco. Quite enjoyable regardless of your musical taste. So, another year in Vegas – and not quite the ho-hum event that many had thought it would be!

Click here for more analysis at Digital Video’s website.

©2014 Oliver Peters

 

DaVinci Resolve 10

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Last NAB, Blackmagic Design caused everyone to perk up when it touted Resolve 10 as an online editor. Once it was released, it became a bit more obvious that Resolve was still primarily a color corrector, but one that also added editing features. This latest update has been out for a number of months (including a lengthy public beta period) and gone through several updates. Resolve 10 was a free update for owners of previous versions. No short review can do this program justice, due to the depth of its toolset, but let’s take a quick dive into what it has to offer. (Click any image to enlarge.)

df_r10_10_smDaVinci Resolve 10 comes in several versions for Mac and Windows, including Resolve Lite (free), Resolve Software ($995) and Resolve ($29,995), which includes the custom Resolve control surface. There are also Linux configurations. All versions will only work with Blackmagic video devices for I/O and monitoring, but these are not required for operation. In addition to mouse, trackpad and tablet control, Tangent Devices (Wave, Elements), JL Cooper (Eclipse) and Avid Artist control panels may be used as lower cost alternatives to the Resolve control surface. The free Lite version is most likely the biggest software bang-for-the-buck in the industry, but you’ll need the paid version for blur and noise reduction, 3D stereoscopic work, support for more than two GPUs and output at sizes bigger that UltraHD.

New in Resolve 10

df_r10_2_smSince Resolve 10 was a pretty thorough overhaul of the Resolve 9 interface, there’s a lot new in terms of minor changes throughout the application. Many functions are more streamlined and logical and will make more sense to the new user. Editing is the biggest new addition and most of the typical functions are there, including various edit modes, tracks, effects, titles, speed changes, transitions and audio. Although I really can’t envision starting any edit from scratch in Resolve 10, it’s easier than ever to make editorial changes when the client has last minute adjustments in mind. The point is that this can now be achieved in the grading session, without having to go back into an edit bay.

df_r10_9_smA big addition is the integration of an effects architecture, using the OpenFX plug-in format. Various developers are tweaking their OpenFX filters for compatibility with Resolve 10, but already I’ve been able to test the FilmConvert film emulation plug-in. Filters are applied to clips or a complete track as a node, so there are no third-party transition effects. However, since Resolve can render the timeline as a single file or as individual source clips, this means that the rendered clips will also have the applied effects baked into the rendered media. The application of an OpenFX filter to a node will slow down render speeds.

Resolve 10 also gained the ability to create DCPs straight from the timeline for cinema masters. However this only preps the project settings and does not cover the licensing fees that you need for an actual DCP export.

Nodes

df_r10_6_smEvery color corrector takes a different approach for how to build up a series of color correction adjustments. Resolve uses nodes, which have become fairly sophisticated. Although, it’s not a true compositor’s node tree, it does start to approach that. Node types include serial, parallel, splitters, combiners and layer mixers. These let a colorist not only string together a series of adjustments (serial nodes), but also split and recombine a signal, and create parallel node paths that are combined for a final output. The layer mixer node includes composite modes, similar to those used in Photoshop. While a lot of Resolve demos got very deep into node trees that dissect every aspect of a shot, I tend to take a simpler approach, sticking to curves and lift/gamma/gain controls. Nevertheless, if you need that power, it’s there in Resolve 10.

Strengths

df_r10_4_smDaVinci Resolve 10 – even the free Lite version – represents an amazing level of versatility. For example, many editors and DITs use it to prep media for an edit. It’s super simple to apply LUTs to log-profile camera files and spit out edit-ready, adjusted source files. Resolve is one of the fastest renderers I’ve encountered and it handles cross-format conversions quite well. For example, it can render Avid-compliant MXF media, which is relatively uncommon. The scaling function is second to none. After Effects used to be my preferred tool for upscaling images, but I’ve found that Resolve is even better. Not only is the quality great, but you have control over the smoothness or crispness of the scaled image.

df_r10_5_smYou can’t talk about Resolve without mentioning the tracker. If you apply a “power window” to a portion of a shot (like a person’s face), you need to track the movement. The tracker in Resolve is a very fast, point-cloud style tracker. These tracks are almost always dead-on, so you never think twice about using the tracker. One the things I especially like about Resolve is the image quality and processing. It uses 32-bit floating math. Essentially this means that you can crank up video in one node – even past the point of clipping – and then pull it back down (recovering detail without a clip) in the next node.

Weaknesses

User interfaces are a very subjective issue in color correction tools, just like they are for editing software. I find this to be a weakness, because I work with a dual-display system. With Resolve you can’t place the viewer on the secondary monitor, like you can with Adobe SpeedGrade CC or Apple Color. You can place the video scopes and the new audio mixer there, but the viewer is locked to the primary screen. If you use the enhanced viewer mode, it hides the node tree. This tends to make operation awkward if you don’t have a control surface nor an external broadcast monitor.

df_r10_3_smThe depth of Resolve’s color correction toolkit is amazing, but it’s almost too much. For example, you have both wheels and sliders for primary control. That makes it very adaptive to different working styles, but it also makes it easy to lose track of which tool you used to make adjustments. Some things don’t make sense to me. For instance, the maximum saturation level isn’t all that large and if you really want a shot dripping with chroma, it takes several serial nodes to do that.

A personal peeve, since I use dual 20” screens, is that something broke between Resolve 9 and Resolve 10. The earliest version of Resolve on the Mac was optimized for 1920×1080 screens (or larger), but then this was subsequently corrected for smaller resolutions, like laptops and the 20” Apple Cinemas. Apparently this has reverted a little with the latest version. With Resolve 9, the interface opened and was correctly scaled for the 20” display. With Resolve 10, the interface opens with the right edge running off the screen. You have to click the green “plus” button (one of the top three buttons in every Mac OS X window) to resize the window to fit the display.

Roundtrips with your editor

df_r10_8_smDaVinci Resolve 10 has the broadest support for roundtrips of any color correction tool, translating XML (Final Cut Pro 7 and Premiere Pro), FCPXML (Final Cut Pro X), EDL and AAF (Avid) list formats. This is a bi-directional roundtrip, so you can import sequences from your NLE into Resolve 10, but then also export NLE-compatible lists that properly relink to the rendered media. When Final Cut Pro X version 10.1 was released, compatibility was broken, but that’s recently been fixed with the latest updates from each company. However, it’s still not quite perfect. I tried two very simple sequences of a few shots each. One sequence used 1920×1080 ProRes HQ files from a Blackmagic Cinema Camera. The other used native, camera raw files from a RED EPIC (various sizes and frame rates). Both sequences were cut in FCP X and the FCPXML from each imported without issue into Resolve 10.

df_r10_7_smGoing the other way, back into FCP X, did present some issues. Both of the new FCPXMLs that were imported into FCP X reported error messages, although the clips and sequences imported correctly. The 1920×1080 files from the BMCC were fine. The EPIC files, which had been resized in the original FCP X timeline, were all interpreted by FCP X as 1280×720, even though Resolve 10 had correctly rendered the media as 1920×1080. These same timelines imported fine into Premiere Pro using standard XMLs.

Final thoughts

DaVinci Resolve 10 is currently the most popular color correction tool, largely because of the free version. It is powerful, though at times I feel that the correction tends to be a little harsher than with other grading applications. The interface could stand to be even more streamlined. Nevertheless, I’ve done grades that required extensive correction, which would have been impossible to achieve in any other color correction application.

It’s an essential tool that functions like a “Swiss Army knife” and as such, you owe it to yourself to spend some time learning it. The manual, written by noted colorist and author Alexis Van Hurkman, is easy to follow. Training resources include online tutorials at Color Grading Central, Ripple Training, Tao of Color and Mixing Light.

Originally written for Digital Video magazine / Creative PlanetNetwork.

©2014 Oliver Peters

NLE Tips – Week 3

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The Avid  – Resolve Roundtrip Workflow

Avid Media Composer has always been regarded as the best offline editing tool and its heritage was built upon a strong offline-to-online workflow. The file-based world has complicated things and various camera formats have made life even more complex for editors. Many have become quite fond of using Blackmagic Design’s DaVinci Resolve as a great companion to Media Composer. It’s cross-platform and even the free version will do most of what you need. Here’s a step-by-step example of how you might use the combo. Relinking varies a bit, based on file metadata and might need to be modified for your particular circumstances. This workflow is great with ARRI ALEXA files and will most likely work well with other similar camera formats. (Click images for an expanded view.)

df_nle3_4_smCreating edit proxies files with Resolve – ALEXA files are usually Apple ProRes 4444 or ProRes HQ QuickTime files that have been recorded with a Log-C gamma profile. So, they are big files with a flat appearance. To start, launch Resolve, load the ProRes camera clips into the Media Pool (Media or Edit tab) and select/edit all of the full clips to a new timeline. In the Color tab, select “track” instead of “clip” and apply a single node. In that node, apply an ARRI Log-C-to-Rec709 LUT. Go to the Deliver tab and pick the Avid roundtrip Easy Set-up. Make sure “Individual Source Clips” is selected (not a single file), define a render location and df_nle3_3_smdecide whether or not to add a file name prefix or suffix (not required). Render using the DNxHD 36 codec choice.

Moving to Media Composer for the creative cut – When the render process has been completed, you’ll have a folder containing Avid MXF media and a corresponding AAF file. This media has the LUT “baked in” and has been rendered with the very lightweight df_nle3_5_smDNxHD 36 codec. Drag the AAF file out of this folder to another location. Now drag this complete folder into any of your Avid MediaFiles/MXF subfolders. Unless you’ve already added extra folders there, you will typically find one existing folder (with Avid’s default label of “1”) that contains MXF media. Change the label of the new folder (the one that you’ve just dragged in) to another number, such as “2”.df_nle3_2_sm

Launch Media Composer, create a new project, open the first bin and import the AAF file that was created by Resolve. This bin will become populated by the color corrected, DNxHD 36 files created by Resolve. Voila, you are ready to edit your Oscar-winner! Cut until the project is locked. When you are done and are ready to move to the online or finishing phase of the edit, export an AAF file from Media Composer. Select “AAF Edit Protocol” and “Link to” media in the AAF options.df_nle3_10_sm

df_nle3_7_smReturning to Resolve for the final grade – Launch Resolve and start a new project. Import the AAF file that you exported from Media Composer. You’ll end up with a timeline that matches your Avid cut and it will be linked to the DNxHD 36 media. You will want to relink the files back to the original camera media – the ProRes HQ or ProRes 4444 files. To do this, delete all the media in the Resolve Media Pool (Edit tab), which will make the timeline clips appear offline. df_nle3_12_smNow, navigate to the folder with the original camera files and bring those into the Media Pool. Your timeline clips will now be relinked to this original camera media. You’ll recognize this because the clips on the timeline will be back to their original, flat, Log-C appearance. In some instances, Resolve may see some files as duplicate and might possibly relink to the wrong file. In that case, you’ll see an error icon on the timeline clip. Click on it and Resolve will present a dialogue window with the possible alternate media options. Pick the correct one and the clip should then be linked to the right shot. Color correct your timeline with the desired grade and any reframing.

df_nle3_6_smReturning to Media Composer to complete the edit – When you’ve completed the color grading, go to the Deliver tab and pick the Avid roundtrip Easy Set-up again, but this time pick a higher-quality codec (like DNxHD 175x). Make sure to set handle lengths (usually 2-5 sec.) and render (as “Individual Source Clips” again). The result will be a new folder of rendered MXF media with the “baked in” grade, plus a new corresponding AAF file. As before, drag out this AAF file and drag the folder of rendered media into the Avid MediaFiles/MXF subfolder. Relabel the folder of this new Resolve media with a different number (such as “3”).

df_nle3_11_smLaunch Media Composer, open your existing project and create a new bin. Import the new AAF file, which will now populate this bin with the high-quality media. This bin will also include the sequence that you sent over to Resolve, but now linked to the high-resolution media files. In many cases, you would simply use this sequence for any final effects, titles and other adjustments.

df_nle3_8_smRelinking the sequence in Media Composer – If for some reason the sequence that was “round-tripped” does not correctly reflect the edited cut as built in the offline stage, then you will need to relink a copy of that sequence to the new media. To do so, duplicate the sequence from your DNxHD 36 edit and move that copy into the bin with the 175x media. Close all other bins, except the 175x bin. Right-click the sequence and select “Relink” from the menu. Set your options to “Select Items In All Open Bins” and relink by “Timecode – Start” and “Source Name – Tape Name or Source File ID”. This will cause the sequence to be relinked to the new 175x final-quality media.df_nle3_9_sm

If everything worked correctly, you will have done a complete offline (creative cut) and online (finishing) workflow between Media Composer and Resolve, without the need for Avid’s traditional import or newer AMA processes!

©2014 Oliver Peters