These are the packages that would be merged, in order:

Calculating dependencies ... done!
Dependency resolution took 0.96 s (backtrack: 0/20).

[ebuild  N     ] media-libs/openh264-2.3.1-r3:0/7::gentoo  USE="plugin -test -utils" CPU_FLAGS_X86="avx2" 58889 KiB

Total: 1 package (1 new), Size of downloads: 58889 KiB