This may be helpful:

pixinsight.com/xisf/#Why_XISF

Regarding the geometry error - frames pulled via indi w/ Ekos and other clients (PixInsight included) are definitely different than those captured with TheSkyX on Linux (incl RPi) for at least the FLI drivers. As an example I get overscan margins w/ indi but not with TSX. It's probable that other cameras are similar. I wouldn't be surprised if this is the case.

PixInsight will error if the image geometry (matrix size, possibly pixel depth too) is not exactly the same between the calibrating frame and the frame to be calibrated - they can't line up.

Same binning? No subframe?

If all the images are taken in Ekos with the same settings then it shouldn't be an issue. Let me try with PixInsignt here in just a sec.

I would submit one of the flatfiles but it's too big to post... you want me to e-mail it?

Hi
Siril has a workaround for it:

HTH

I was kind of hoping a similar setting would be available to be set in Ekos.

If there is none, then how would I go about and change te fits files (in batch) to be compatible?

Marco

Just to add, I use same binning, etc.

And what's more, the flats and darks do not give me: ** Warning: The FITS format does not define an unambiguous orientation of pixel data. The coordinates read on the image may be wrong.

So it's just the lights that seem to contain the unambiguous orientation data.

Marco

Hi
The flat and dark frames are not debayered before stacking. You the combine them with the light frames which are.
HTH

**If you want colour, just use Siril? It's very quick and easy to use.

Is this bayer related? is there a FITS keyword to specify the orientation?

My lights are also RAW16 so they are not debayered. But I think that is not the point. PixInsight doesn't seem to be able to unambiguously determine the orientation.

Could it be that there is some information added in the keywords that causes this?

I do not think it is a bayer issue,

Possibly the darks and flats do not have coordinates data in them. You can check this by inspecting the fits header.

Can you share a few of each via dropbox, google drive, or similar?