there is no libzimg-dev anymore, I guess the name is somehow changed, which package contain this? It was there in 16.04.
Weird, as the launchpad still lists it as a valid package (even though it seems to have not been updated since early 2018 according to the changelog), you can follow this link and download the .deb file yourself if that helps: https://launchpad.net/~mc3man/+archive/ubuntu/bionic-media/+sourcepub/9055776/+listing-archive-extra
Edit 2: For this package, you'll need to run the following two commands to add the PPA to get the package through apt-get:
sudo add-apt-repository ppa:mc3man/bionic-media sudo apt-get update
sudo apt-get install libzimg-dev
Edit: That download link should be for 18.04, just make sure you properly get the 64 bit version if you have a 64 bit install of Ubuntu or 32bit for 32 bit Ubuntu.
Hope this helps you out! :)