exiv2

Read and write EXIF, IPTC, and XMP metadata in image files

brewmacoslinux

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EXIF and IPTC metadata manipulation library and tools

exiv2

Display all metadata from an image file$ exiv2 print photo.jpg

Extract EXIF data and save to a file$ exiv2 -ea photo.jpg

Modify image metadata (set copyright)$ exiv2 -M"set Exif.Image.Copyright My Copyright" photo.jpg