@kmilos The more I learn about images, the less I know. It’s an endless mess of overlapping/duplicated standards that do the same job in much the same way. What’s the point of this mess? I smell business self-interest and brand loyalty over consumer choice and open standards.
I have worked with Peter to decode the metadata in both AVIF and HEIC files. The Canon CR3 file is also ISOBMFF, however the metadata structures are 100% different. JP2000 uses yet another scheme. So, although those files are all ISOBMFF, the internal structure of the metadata depends on the file formats.
Let’s try to get a sufficient spread of test files to be confident that when everything is delivered, darktable users will be happy. I’d like test images now to avoid bug reports later!