On trying to get metadata into my AVIF files, I discovered a few things….
The AVIF files which darktable version 3.4.0 (compiled from source on Ubuntu 20.04 LTS) produces do have EXIF metadata. They do not appear to have IPTC —I may be wrong on that— nor XMP metadata. (Indeed, the WebP files which darktable produces also seem to lack IPTC/XMP metadata, although they do have EXIF metadata). Exiv2 vesion 0.27.3 cannot read nor write metadata to nor from an AVIF file —which makes me wonder how the metadata got into the AVIF files which darktable writes. Exiftool version 11.86, (library version 11.88, WTDickens?!?), does read, write, and copy metadata in/out of AVIF files, including, apparently, IPTC, and XMP metadata, (although I did not actually check on IPTC data yet, it does copy XMP data for certain). I mention this because I had previously suggested that ExifTool does not r/w/c metadata to/from AVIF files. So, thank you, darktable developers, for giving me my EXIF data in my AVIF (and, of course, WebP) files. Now if I can only find a viewer —other than Chrome, Chromium, & Firefox— which can view an AVIF, and also, which can display its metadata. ;-) Sincerely, Karim Hosein Top Rock Photography 754.999.1652 On Fri, 29 Jan 2021 at 14:10, Top Rock Photography < ka...@toprockphotography.com> wrote: > My only concern is that, although AVIF is not patent encumbered, he > refused to add the reading/writing of metadata data to AVIF, until he > speaks to a lawyer. That has been quite a long time ago and so, my AVIF > files made by darktable seem to have no metadata. > … > > Currently, Exiftool is no better (in that regard). Worse yet, aside from > the most popular browsers, (Firefox, Chrome/Chromium), I cannot find a > viewer for AVIF files. > > I have other issues on AVIF support, but this is not the thread for that. > > Sincerely, > > Karim Hosein > Top Rock Photography > 754.999.1652 > > > > >> >> a: How will this affect DT? >> b: Supplementary question: Would exiftool be an alternative for DT? >> >> ____________________________________________________________________________ darktable user mailing list to unsubscribe send a mail to darktable-user+unsubscr...@lists.darktable.org
