Auto ETTR and Post Deflicker

[brapodam]

How do I do it properly? I tried it one day for a sunset time lapse, but post deflicker decided to decrease the exposure so much that everything became underexposed. If anyone's interested, here's a tiff file exported by ufraw (no edits, only the exposure change from post deflicker). https://docs.google.com/file/d/0BzFGDdZw7pVwcDRaWWpsQXhwOTA/edit?usp=sharing It's the first frame of the entire time lapse sequence, shot about 20 minutes before sunset time.

Is it that the post deflicker target was too low? I had it at the default of -4EV (I think the first frame was about -2EV)

Or should I use a higher percentage highlight ignore in Auto ETTR because my shot included a lot of the sky?

Anyone?? I'm pretty sure the combination of Auto ETTR and post deflicker is not supposed to produce such massively underexposed images.

[a1ex]

Post some images (DNG + sidecar).

[brapodam]

Post some images (DNG + sidecar).

Sure, I've uploaded a couple of random DNGs and their UFRAW sidecars from the test I did. Original DNGs seemed slightly underexposed (I had set Auto ETTR to always on though) already and yet post deflicker does further exposure reduction

https://drive.google.com/folderview?id=0BzFGDdZw7pVwbkN1bFlNMFZ1UXM&usp=sharing

[a1ex]

Something's fishy, it's a lot more underexposed than what I'm getting...

I'm setting post deflicker at -3EV, but that's because my modified version of ufraw tends to output darker images than normal.

You can try to write a script that adjusts the all the exposures from sidecar files by the same amount.