On Mon, Dec 29, 2014 at 6:49 PM, Bernhard <[email protected]> wrote: > I did not make it through the process of bug report by now. > Anyhow, since I use V1.6.1 from Pascal's stable PPA the following occurs: > > I import a file or directory of files in lighttable > There is a message "File {filename} not available" and the "broken file > icon" will appear in lighttable. > I try one of those broken files to open in darkroom > There is a message "Could not read white balance data of the camera" > > Sample file here > http://www.bilddateien.de/transfer/files/1995_01FM28.dng
Yeah, rawspeed just can't read this file. It seems to be 16bit data, marked as RGB but with 4 samples per pixel. So it could be a strangely encoded bayer pattern except as you found out normal image viewers open it fine which would suggest normal RGB. > I'm in discussion with Jacob about what can be called "a real RAW file" from > a scanner - as there is always some software in between that might give in > "it's own taste" ... A real RAW file would require actual demosaic of the bayer pattern, usually have >0 black point and <65535 white point, etc. That would make sense to stuff into a DNG as normal TIFF files don't need demosaic/etc and most software won't know what to do with a bayer pattern TIFF. >> There's probably no benefit from the DNG and the TIFF should be fine. > > That's probably the case - at least no difference in file size between DNG > and TIFF with TIFF compression on. Yeah, that makes sense, it's the same data. > btw: Gnome image viewer will open the file. It wouldn't be hard to teach rawspeed to open them but I don't see much point in generating them anyway. Cheers, Pedro ------------------------------------------------------------------------------ Dive into the World of Parallel Programming! The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net _______________________________________________ Darktable-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/darktable-users
