Perhaps a more complete list of packages depending on the existing libexiv2-4 API is (obviously including ones provided by the exiv2 package):
$ apt-cache rdepends libexiv2-4 libexiv2-4 Reverse Depends: libexiv2-4-dbgsym ufraw rawstudio qtpfsgui python-pyexiv2 merkaartor libkexiv2-3 krita-kde4 kphotoalbum hugin-tools gpscorrelate-gui gpscorrelate gnome-commander gimp-ufraw geeqie libstreamanalyzer0 libkexiv2-7 libexiv2-dev gwenview exiv2
Perhaps a more complete list of packages depending on the existing libexiv2-4 API is (obviously including ones provided by the exiv2 package):
$ apt-cache rdepends libexiv2-4 yzer0
libexiv2-4
Reverse Depends:
libexiv2-4-dbgsym
ufraw
rawstudio
qtpfsgui
python-pyexiv2
merkaartor
libkexiv2-3
krita-kde4
kphotoalbum
hugin-tools
gpscorrelate-gui
gpscorrelate
gnome-commander
gimp-ufraw
geeqie
libstreamanal
libkexiv2-7
libexiv2-dev
gwenview
exiv2