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Premiere Changes Color Space of .R3D When Keyframing Scale/Position
This is a strange one.
The opening shot of my feature utilizes a post-zoom, aka keyframing the scale/position of the beginning/end of the shot. However, when the zoom/keyframes finish, there is a DRASTIC change in the color space (not displaying my final color grade – blueish shadows – but something completely out of left field – green shadows).
I can 100% confirm (well, 99% confirm) that the keyframes are causing the issue. I’ve deleted every other layer, effect, etc. with no change, but when I delete the keyframes, the desired color space comes back. As a matter of fact, the color space changes at the exact frame AFTER the final keyframe.
I’ve tried deleting rendered files, changing preview codec, clearing cache, and duplicating the sequence with no luck.
I’m guessing it has something to do with the .R3D or IPP2? Or maybe I’ve officially lost my mind while editing a feature film?
Just in case, here are some specs:
Project: shot on RED Helium (8k, 7:1 compression, HDRx) with a Low Light Optimized Filter.
Adobe PP CC 2021 Project Settings: Preview Frame Size: 5182×2160 (shot 2x anamorphic), Preview Format: Quicktime Apple ProRes 422 (max bit depth/render quality UNchecked), Mercury Playback Engine GPU Acceleration (Metal), Video Layers -> v1: .R3D’s + .AE Linked Comps, v2: Lumetri Adjustments, v3: Red Giant Denoiser, v4: FilmConvert Nitrate, v5: REC709 Conversion (supplied by RED)
Hardware: 2010 Mac Pro w/ 2 x 3.46 GHz 6-Core Intel Xeons, 96 GB DDR3 RAM, Radeon RX 580 8 GB GPU, 1 TB PCI SSD, 8 TB Ext. USB 3.0 Drive.
Thanks, y’all!
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7 Replies
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Can you test this theory in After Effects?
Also, use a Video Effect for the zoom and see what happens.I can’t see any transform to cause this other than your using a proxy or voodoo.
In most cases when it’s an integral edit such as intros I lean towards After Effects.
I treat it as a special VFX shot.
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<div>I will definitely try it in AE and let you know.
</div><div>I tried deleting the Scale/Position keyframes and applying the “Transform” video effect instead, but before I even attempted the zoom, the color space changed with just the effect applied.
Weird.
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Also, for what it’s worth, I’m not using any proxies during this specific shot. Just the aforementioned layers.
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AE Dynamic Linked Comps are raising the same issue. Both change color space/noise of the image.
Let the hair pulling continue.
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Just a point on technical terminology. You are seeing a change in the color correction, but not color space. Color space is something like Rec 709 or Rec 2020 and is based on the timeline. Obviously something wonky is happening, but technically it’s not a change in color space. Just to check, make sure there are no other keyframes at those points other than scale/position. What happens when you turn off GPU processing and go to a software-only render? Render just that clip and see what happens.
Also, turn off Nitrate and see what happens.
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Thanks for the clarification. Oh, the irony of the word “correction” in this situation.
I’ve checked every possible layer, frame by frame, and the only keyframes ending on the particular frame are the scale/position. Oddly enough, when I delete both scale/position keyframes the problem stops. BUT, if I only delete the scale keyframes and the problem stops. So, it doesn’t have to deal with the position keyframes, only the scale keyframes.
When I switched over to software-only rendering, the problem transferred over to both the keyframed clips AND the non-keyframed clips, even when rendered. Greener shadows, less noise/sharpness.
Even with the Nitrate Adjustment Layer deleted, the problem persisted. The problem exists on the original .R3D video file.
Why do I have a sneaky suspicion this has to do with my preview settings?
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I have a similar conversation going on in a neighboring forum, but since this is the issue at hand that I’ve just solved, I think it needs to be shared.
This same issue with the changing color of the Dynamic Linked AE comps was also happening with a post-zoom effect native in Premiere Pro. I reenact a zoom by scaling up the 8K footage in my 4K comp, however, the goofy color shift would end the second the scaling keyframes were finished.
After endlessly and aimlessly messing around with many settings, codecs, timelines, etc….I was able to relinquish the post-zoom debacle in Premiere Pro! Starting a new sequence in PP with the original source clip’s settings (8K sequence) and trying to recreate the same effect, the color shift was NOT present during the scaled zoom. I dropped the same clip into my working 4K timeline and SCALED TO FRAME SIZE to try it again….and it didn’t exist. I then noticed the kicker: my video files currently in use are NOT Scaled to Frame Size, but I rather MANUALLY decreased the scale to 50% to fit the sequence via the scale slider in the effects tab (don’t worry, it’s a one-take film so I wasn’t doing this hundreds of times). With that said, my existing clips’ scales read 50% (scaling down from 8k to 4K) and the newly successful zoom clip’s scale reads 100%, yet both yield the same quality. (I blame the hiccup on this being the first time for me shooting anamorphic, as there were a lot of odd sequence size calculations on my end dealing with the x2 post-stretch)
Could manually scaling vs. Scale to Frame Size be the issue to all of this? All of my AE clips are scaled to 50% via AE, and they were when I clicked “Replace with AE Comp.” I know AE’s “Fit to Comp” displays the proper scaling percentage, but apparently PP just automatically considers it 100%.
Considering I have over 70 linked AE comps, I really do not want to redo this massive amount of work (hell, or even re-link them all). Do any of you incredibly helpful geniuses have any input? Or is this scaling issue in PP unrelated to AE?
(I will attempt a render in AE later on tonight).
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