What is Exiv2?
Exiv2 is a cross-platform library for handling image metadata. With this application, you can view Exif, IPTC, and XMP metadata, as well as ICC Profiles embedded in digital images in various formats. Due to its free nature, Exiv2 is included in many projects, including KDE and GNOME desktops, as well as applications like GIMP and DarkTable.
Exiv AVIF support
On June 15th, 2021, Exiv2 v0.27.4 was released. All BMF formats are supported, including AVIF, JXL, and HEIF.