Building ImageMagick with support for HEIC images
iPhones now produce .heic images. ImageMagick, which I often use for image conversion, supports these in newer versions. However its support is new enough that the version of ImageMagick in Ubuntu/Debian repositories doesn't include it.
I didn't find good instructions about building ImageMagick with .heic support included, so I'm writing some! These steps worked for both ImageMagick 6 and 7 in an Ubuntu Bionic Docker container.
apt-get install build-essential \ libde265-dev \ autoconf \ git-core \ libheif-dev apt-get build-dep imagemagick ./configure --with-heic make -j4 make install ldconfig magick --version # You should see heic on the Delegates line