I see that darktable is storing the file revision history in the XMP. When you discuss this matter with darktable, can I bring to your attention that XMP is also limited to 64k bytes. I won't close this issue as you may wish to discuss it further. stRef:originalDocumentID XmpText 32 3332781E8A87190381750F32CF4AD870ġ348 $ Regretfully, I do not believe Team Exiv2 can be of further help to you in this matter. stEvt:softwareAgent XmpText 33 Adobe DNG Converter 9.5 (Windows) stEvt:parameters XmpText 69 converted from image/x-pentax-raw to image/dng, saved to new location XmpText 35 smc PENTAX-DA L 18-55mm F3.5-5.6 AL XmpText 33 Adobe DNG Converter 9.5 (Windows) Putting the whole thing together with your files: 1344 $ exiv2 -pa IMGP0385_01.jpgġ345 $ exiv2 -pX IMGP0385.dng > IMGP0385_01.xmp # extract the XMP from the DNGġ346 $ exiv2 -iXX IMGP0385_01.jpg # put the XMP into the JPGġ347 $ exiv2 -pa IMGP0385_01.jpg # a little happiness The XMP can be extracted from the DNG using the command $ exiv2 -pX foo.dng > foo.xmp The XMP can be inserted into a JPEG use the exiv2 v0.26 command $ exiv2 -iXX foo.jpg There is something that can be quickly and easily done on the command-line, or by darktable. darktable can use the APIs in libexiv2 to delete uninteresting metadata to obtain a subset that fits into a 64k segment. How can this be solved? Some application (such as DNG Creator or darktable) has to filter the metadata to a limited subset in the JPEG. DNGs are Tiff files and have a limit of 1g of Exif data. Your DNG seems to contain too much Exif metadata to be stored in a JPEG. All Exif data must reside within a single APP1 segment which is limited to 64k bytes. No JPEG can ever store more than 64k of Exif metadata because of the design of the JPEG container. The reason for the message is because there is too much Exif data to be stored in the JPEG. IMGP0385.exv: Could not write metadata to file: Size of Exif JPEG segment is larger than 65535 bytes However when I run the command to extract the metadata, there is an error message: 1320 $ exiv2 -ea -verbose -force IMGP0385.dng The exiv2 command-line tool can copy metadata from a DNG to a JPEG. The resulting JPG contains an image with no metadata. So my speculation is that you have used darktable to successfully create a JPEG. And you've said that you are using darktable (which uses libexiv2 to do many things).
Darktable export problem code#
Exiv2 does not have code to convert DNG to JPEG. No errors can be seen in the terminal on opening darktable or exporting to JPEG Similar thread on the darktable bug report platform: CR2/PEF converted to DNG via Adobe DNG converter Ii libexiv2-14:amd64 0.25-2.1pmjdebruijn1~xenial amd64 EXIF/IPTC metadata manipulation libraryġ. Ii exiv2 0.25-2.1pmjdebruijn1~xenial amd64 EXIF/IPTC metadata manipulation tool Ii python-pyexiv2-doc 0.3.2-5ubuntu4build2 all Documentation for Python binding to Exiv2 Ii python-pyexiv2 0.3.2-5ubuntu4build2 amd64 Python binding to Exiv2 Ii libgexiv2-2:amd64 0.10.3-2 amd64 GObject-based wrapper around the Exiv2 library
Ii libexiv2-14:amd64 0.25-xenial~ppa2 amd64 EXIF/IPTC metadata manipulation library Ii exiv2 0.25-xenial~ppa2 amd64 EXIF/IPTC metadata manipulation tool Camera, date taken, shutter speed, aperture, exposure, ISO, etc. Looks like headroom=400 and requirement=768.JPEGs created from DNGs have no metadata from the original file. Am I right that it’s in darktablerc? If so, this is what I found: I started darktable from the command line as you said, but I wasn’t sure where to look for the output. How much memory headroom do you have for OpenCL? Can you start darktable with -d opencl from the CLI and post the output? Also share the OpenCL settings in preferences. ( Creative Commons, By-Attribution, Share-Alike) This problem first occurred in the middle of exporting multiple images, and all of them exported fine until it got to the one with the Blurs module.Īnyone have an idea what’s going on? My feeling is that the module is doing something that the GPU can’t handle, although my 580 with 8GB VRAM should be able to handle most things that darktable throws at it. I have never had any problems with exporting before, nor problems with openCL. I have found this with two images so far. Disabling the blurs module seems to allow the image to be exported fine.
Darktable export problem full#
The JPEG generated is completely black and darktable usually needs to be restarted to get full functionality back.
Darktable export problem driver#
I have found that the blurs module is causing a driver timeout error when I try to export images to JPEG. I can submit this on github as a bug, but I just wanted to see if anyone here could tell me if I was missing something obvious first.
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