Am Samstag, 6. Februar 2016, 11:03:40 schrieb Matthias Bodenbinder: > Am 05.02.2016 um 11:34 schrieb Tobias Ellinghaus: > > I had a closer look at the samples from dpreview. The original file has > > only a single image embedded which is marked as a "rendered preview or > > reduced resolution [...] raw" according to DNG specs (NewSubFileType is > > 1). We ignore those. > > Hello Tobias, > > thanks for looking into that. The "original file" you are referring to is > the DNG file created by x3f_extract. So I took your feedback and create a > bug report for that tool saying that darktable is not reading their DNGs. > The answer I got is this: > > "This is not surprising. Almost no one, except Adobe, reads Linear RAW. The > thumbnail they refer to is there. But, there is also a Linear RAW, that > they probably do not read."
Well, the file size indicates that there is more than just the preview in the file, but the DNG decode doesn't even see it. So it gets ignored deeper down already (I guess it misses the COMPRESSION tag so it doesn't get passed to the point where it would be rejected). Anyway, at least the two Lightroom files are now supported in darktable, thanks to Pedro. > What does that tell me? I do not understand a word. Basically just that it's not supported, and that it's not that easy to add support I guess. Unless Pedro shines again. ;-) > I do not own a Sigma camera. So I do not really suffer / benefit from the > matter. But I know from other forums that Linux - Sigma users are looking > for a RAW workflow in the Linux world. As far as I know the x3f_extract > DNGs is the only potential way to handle Sigma RAW files with Linux. > > Matthias Tobias PS: Is anyone aware of a tool that can dissect DNGs or TIFF in general and makes it easy to see what tags are set, what images are included, ...? Currently I always have to add random printf to the rawspeed code to get some insights, which sucks.
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