Hi Timur, On 04.04.2018 21:06, Timur Irikovich Davletshin wrote:
> 1. DT relies only on libexiv2 in extraction of EXIF metadata. > 2. exiv2 fails to extract vendor specific information from DNG file > (converted via Adobe DNG Converter) when compared with exiftool. But > original NEF data is there. > 3. As last resort for lens detection DT relies on Exif.Photo.LensModel, > which is just ASCII string encoded by converter. > 4. Converter writes ambiguous data in Exif.Photo.LensModel without. No > vendor, no exact model, just '18.0-55.0 mm f/3.5-5.6'. > 5. Feeding vague data to lensfun gives no good results. > 6. Native DNG by Pentax use non-standard vendor specific Exif.Pentax* > namespace. > 7. Focus distance information is also vendor specific. > > If not mistaken problem should be fixed on very root... which is > libexiv2. But it's just MHO. I didn't check it, but that sounds like the right direction. I guess it could be confirmed by dumping the metadata using the libexiv2 command line tool (exiv2) and comparing the output to what exiftool gives. cheers, Simon ___________________________________________________________________________ darktable developer mailing list to unsubscribe send a mail to [email protected]
