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

Calculating dependencies ... done!
Dependency resolution took 1.00 s (backtrack: 0/20).

[ebuild  N     ] media-video/mjpegtools-2.2.1-r2:1/2.2::gentoo  USE="png -dv -gtk -quicktime -sdl -sdlgfx -static-libs" CPU_FLAGS_X86="mmx" 2272 KiB

Total: 1 package (1 new), Size of downloads: 2272 KiB