On Tue, Nov 24, 2015 at 10:40 AM, Kristian Niemi
<kristian.ni...@gmail.com> wrote:
> Hi,
Hi.

> (1) Using a current build of dev-darktable, on export, I currently sometimes
> get completely black images. Not always, but sometimes. It is not limited to
> camera, exposure, or some such.
Well, without more info i would guess that your computer does not have
enough memory.

> I do not know how to reproduce it --- but it does seem that opening the
> image in darktable and changing (for instance) cropping slightly at times
> solves the problem. At times not.
Which makes image smaller, so it would require slightly less memory.

> Example images (NEF + XMP) available @
> https://www.dropbox.com/sh/4bzqme4zb4ftv2o/AAAkzzI8zQ6CQybWmgt9PXpRa?dl=0 As
> shown in the jpg, all but one of the example files export completely black
> images. Included one which does not export completely black as reference.
>
>
> (2) Sometimes, the exposure shown in darktable is very different (like +2EV)
> from what is actually exported. I don't have an example image available, but
> can provide one later today.
Can't say anything here without reproduction steps.

> (3) I like the latest development of the exposure module, with the
> manual/automatic modes etc. ---But in automatic mode, how do I tell the
> module what part of the image it should measure?
That feature is not implemented for exposure mode = "automatic".

> Currently, I've yet to find
> how to select a specific part of the image, always having to resort to whole
> image being source of exposure measurement. (Obviously, using blend isn't an
> option here, as that would lead to only parts of the image being exposed
> with given settings.)
Indeed, blend is not the solution here.

> Kind regards,
> Kristian
Roman.

>
>
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