Rec2020 output - I'm going to go back and try all this with pixels (photographic content) instead of a ramp made with the Gradient tool in AE. So direct render is out.Īfter Effects via Adobe Media Encoder - BEST case scenario - using elements created in AE (useless then for photographic/video content), you still get a dramatic gamma shift when attempting to make Rec2020 content, and HDR content bands so much as to make the entire effort useless - you've got high dynamic range, but something like 100 or fewer steps between darkest and lightest tones - useless for the effort we're undertaking! SO - After Effects can't make an HEVC file - it lacks that as a choice when exporting. I then took that EXR sequence and placed it into Premiere, and rendered both using Export as well as Add to Media Encoder Queue - exact same results. Here's the source (screen grab from Premiere):ĤK UHD material with Main10 (10 bit output) - matched sourceĤK UHD 10 bit Rec2020 - a SIGNIFICANT gamma shift (this from HEVC file placed into Premiere):Ī LOT of banding and a shift to green. Linearlzing the working space did make the black to white ramps look different (because linearized), but in general here were the results: I then rendered the results using Add to Adobe Media Encoder Queue, brought those resulting HEVC files into Premiere and compared the results on scopes - comparing to an EXR sequence rendered straight out of After Effects. as well as None selected (with all buttons off) 2020) - E (with Linearize, Blend Colors w/1.0 Gamma, Compensate for Scene Referred - all those on, as well as all those off) ITU-R BT.2020-1 (with Linearize, Blend Colors w/1.0 Gamma, Compensate for Scene Referred - all those on, as well as all those off) In After Effects, I tried different Working Color Spaces that might make sense: I made a ramp in AE using he Gradient tool (so no Compensate for Scene Referred interference) Open and compare, as you’ve seen in the above description. These settings are otherwise identical, but 11 is HDR and 12 is SDR.Īpply these two settings to the queued GradationTest and render. Navigate to the folder I provided, in MediaEncoderPresets, and select the two. In Adobe Media Encoder, in the Preset Browser, select Import Settings (the fifth icon under the words Preset Browser). Go to the Composition pulldown menu and select Add to Adobe Media Encoder Queue. Open the After Effects Project, and the GradationTest will be open. zip archive, which contains an After Effects project, and two Adobe Media Encoder settings. I've done a ton of testing with the Media Encoder presets to try to work around this, and after 40 or 50 settings and innumerable attempts, I can't get it to work and I'm confident the problem is with Media Encoder.Īttached is a. Want to prove it yourself? Here's a link to my Public Dropbox so you can download the After Effects file, media, and Adobe Media Encoder settings used to create this situation. And in fact, you can't access it UNTIL you turn on "Main10" which is what gives you 10 bits/channel. 6 bit, with 64 steps, seems to be OK, so I'd say I'm getting between 6 and 7 bits of detail out of this. There are a lot of these inconsistencies, where the width from one step to the next varies every few bars. If you look carefully at the 128 steps - 7 bit bar (the one under those words), you'll see some inconsistencies - it isn't a smooth blend. Notice I now have banding where I didn't before - the top three bars that were smooth before are now in discrete steps. Here's what happens when I take the exact same setting, and turn on the HDR switch: But my 8 bit gradations are still nice and smooth, so far so good. It is clipping the blacks, but OK, that's potentially resolvable with an Adjustment Layer. If I output enable Main10 (gives me 10 bits/channel instead of default 8), and enable Rec2020 and render it, I can get this: Just note that there is more and more banding the further down you go in the chart. This was made from an Illustrator file, when I did a blend with the specific number of steps (Blend maxes out at 1000 steps, so I couldn't do 1024 for 10 bit). Unfortunately, while the Rec2020 option now renders smoothly to SMPTE range, when the HDR switch is enabled, the same setting will render to less than 7 bits, producing a lot of banding artifacts. I’ve been experimenting with UHD HEVC encoding options for a while now, and was very interested in the new HDR options. Executive Summary: Adobe’s HEVC implementation renders footage to <7 bits when HDR is selected, even when set to deliver 10 bits.
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