When processing DNGs from ML RAW video using Adobe Camera RAW (in either AE, Photoshop, or LR) the color/luma of the resulting footage shifts when the objects in the scene change. I'm a little surprised I haven't come across any discussion of this yet given how much of an issue it's been for me and how much I've noticed it in others' footage.
This can be seen subtly at 1:20 here (the luma of the water changes when the dark subjects cross the foreground): https://vimeo.com/66480704
Here's a shot where it's especially noticeable (watch the luma of the building in the background): https://docs.google.com/file/d/0B1keq-qyTGDNT21mR0hmWVFFc2s/edit?usp=sharing
This issue only occurs if you change the Camera RAW settings sliders (Clarity, Highlights, Vibrance, etc.) from their default/neutral states. It therefore seems like Camera RAW uses the color/luma values of the ENTIRE image to determine how to apply the demosaicing algorithm to any given pixel. In other words - the settings sliders aren't absolute controls, but rather they adapt based on the average color/luma of the frame. This phenomenon/method obviously wouldn't be an issue when processing still photos because the average color/luma of the frame doesn't change. But with video, it does.
Has anyone found a method to overcome this?
This can be seen subtly at 1:20 here (the luma of the water changes when the dark subjects cross the foreground): https://vimeo.com/66480704
Here's a shot where it's especially noticeable (watch the luma of the building in the background): https://docs.google.com/file/d/0B1keq-qyTGDNT21mR0hmWVFFc2s/edit?usp=sharing
This issue only occurs if you change the Camera RAW settings sliders (Clarity, Highlights, Vibrance, etc.) from their default/neutral states. It therefore seems like Camera RAW uses the color/luma values of the ENTIRE image to determine how to apply the demosaicing algorithm to any given pixel. In other words - the settings sliders aren't absolute controls, but rather they adapt based on the average color/luma of the frame. This phenomenon/method obviously wouldn't be an issue when processing still photos because the average color/luma of the frame doesn't change. But with video, it does.
Has anyone found a method to overcome this?