If the DNG Converter encounters a file that has problems, it will throw an alert error in the Conversion Status dialog as shown above. Jeff Schewe: "Another little known benefit of using the Adobe DNG Converter is the ability to do a simple verification that the raw file you are converting is not corrupted. Why save raw files that have been converted to DNG? So, I'll say "don't try this at home", while doing exactly that myself!" Now, it's possible that the camera vendors may be persuaded to document these private tags sometime before hell freezes over, and in that case, it's conceivable that other software may be able to use them".īarry Pearson: "Once I have at least 2 DNGs of each file in different places, I delete the original Raws, without embedding them first. It is not clear whether the " TIFF & TIFF- derived "raw"" formats satisfy the MakerNote principles above.ĭelete Proprietary files after using Adobe DNG?īruce Fraser: "The reason to embed the original raw file is to keep obscure bits of private metadata that only the proprietary raw converter understands. This discusses whether raw formats are TIFF-based or not. This allows an application that understands the MakerNote format for a particular camera to find the MakerNote data, along with the original byte order and file offset, and thus parse the MakerNote data correctly from the DNG file". This repackaging stores the source file's byte order and the original file offset to the MakerNote, along with the MakerNote data itself. These MakerNotes are often byte order or offset dependent, so what I'm doing to preserve this data safely is repackaging it into the DNGPrivateData tag. Thomas Knoll: "The code change in ACR/DNG 3.1 that preserves private MakerNotes applies to all formats that store their private data using the Exif MakerNote format, which includes Pentax. However, it's metadata that Camera Raw can not currently use so if you are satisfied with the way Camera Raw can convert your file, then the proprietary metadata may be meaningless to you". Is this important data? Hard to say since it's undocumented. " If your Raw file format is not NEF or CR2, some or most of the proprietary, undocumented metadata found in the private maker notes of the EXIF specification will be stripped out. As a result, if, at some time in the future Nikon grants Adobe permission to decrypt the WB data, it'll still be there in the DNG file waiting to be used, as will all the other undocumented metadata. It isn't decrypted, but it is safely moved. Even the Nikon D2X encrypted As Shot white balance is moved to the converted DNG file. " So, if you shoot NEF or CR2 you will, in essence, loose nothing by converting to DNG. Future updates to the Adobe DNG Converter will continue to add to the scope of what is preserved and migrated to DNG. Also, black masked pixels (the far outer edges usually cropped off by conversion software) for certain files, such as some CR2 files are also not preserved in DNG conversion. So some metadata will be migrated and some will be stripped. Additionally, Canon CRW files and Fuji RAF do not completely adhere to the TIFF-EP and EXIF spec. File formats from Kodak, Foveon and Leaf do not use EXIF private maker notes, so those files are not supported for migration. The file formats that do NOT use EXIF based private maker notes are not migrated. Jeff Schewe: "DNG Converter 3.1 and above does indeed move all EXIF private maker note from all TIFF-EP based raw file formats, not just NEF and CR2 files. Support of black masked pixels in 3.2 which was released TopicĬonversion other than Sigma / Foveon cameras It also contains some information about the quality of the information within DNG files. This table attempts to capture such information until it is published at a better location. Detailed information about that support's capability or about potential problems may appear in forums, and eventually disappear when the forums are tidied. What about bugs and deficiencies in key software products?ĭo DNG files contain all the original raw image data?ĭetailed technical documentation about Adobe's support of DNG tends to be fragmented.Do DNG files contain all the original raw image data?.This page continues to hold the full list that I have available, while the Using DNG safely page holds what I consider to be just the important, typically recent, subset. The latter was getting cluttered up with large numbers of reports about the completeness of the contents of DNG, and reports of problems with Adobe software, most of them duplicates or only of historical interest. This is an overflow page for the Using DNG safely page.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |