Some exported images completely black
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.
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.
I've exported far larger images without a problem, and it's not about cropping the image into something smaller (that sometimes solves it), but changing the crop --- as in moving it, enlargening it or whatever.
I uninstalled darktable, removed local cache, and rebuilt it (git version 2.0rc2+40~g0d208c2-dirty).
Still same (bad) result.
Exporting file 151101_173549_Assi_ghat_01.NEF.xmp results in the black image "151101_173549_Assi_ghat_01.jpg".
I duplicated the image in darktable, and only changed area of crop --- moved the box; size is identical. And it (151101_173549_Assi_ghat_02.NEF.xmp) resulted in a "image with features" ("151101_173549_Assi_ghat_02.jpg"). Made no other changes. (Is it the cropping module that is at fault?)
The same results are reproduced each and every time I export these two images (01.NEF.xmp and 02.NEF.xmp).
From a batch of about 200 images, I've gotten this result (black image) in circa 10. I've yet to see a pattern why it happens to some, not others. (Which makes it all the more annoying.)
As NEF exceeds 39.1MB it is available here: https://www.dropbox.com/sh/4bzqme4zb4ftv2o/AAAkzzI8zQ6CQybWmgt9PXpRa?dl=0
#2 Updated by Roman Lebedev about 4 years ago
- % Done changed from 20 to 100
- Status changed from Triaged to Fixed
Applied in changeset darktable|8f02be02de9629adbbd89480f2858501dcdbb799.