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

Calculating dependencies ... done!
Dependency resolution took 1.23 s (backtrack: 0/20).

[ebuild  N     ] media-libs/libogg-1.3.6::gentoo  USE="-static-libs" 430 KiB
[ebuild  N     ] media-libs/libdvdcss-1.4.3:1.2::gentoo  USE="-doc" 380 KiB
[ebuild  N     ] dev-libs/libunibreak-8.0:0/8::gentoo  USE="-doc -man -static-libs -test" 1063 KiB
[ebuild  N     ] dev-lang/yasm-1.3.0-r2::gentoo  USE="nls" 1458 KiB
[ebuild  N     ] dev-libs/jansson-2.15.1:0/4::gentoo  USE="-doc -static-libs" 478 KiB
[ebuild  N     ] media-libs/dav1d-1.5.4:0/7::gentoo  USE="8bit 10bit asm -test -xxhash" 1015 KiB
[ebuild  N     ] media-libs/opus-1.6.1::gentoo  USE="-custom-modes -debug -deep-plc -doc -dred -hardened -osce -static-libs -test" CPU_FLAGS_X86="sse" 10228 KiB
[ebuild  N     ] media-libs/x264-0.0.20240513-r1:0/164::gentoo  USE="interlaced -opencl -static-libs" 822 KiB
[ebuild  N     ] media-libs/zimg-3.0.4-r1::gentoo  USE="-debug -static-libs -test" 319 KiB
[ebuild  N     ] media-libs/fdk-aac-2.0.3:0/2::gentoo  USE="-examples" 2839 KiB
[ebuild  N     ] dev-libs/libudfread-1.2.0-r1:0/3::gentoo  32 KiB
[ebuild  N     ] media-libs/libdvdread-7.1.1:0/8::gentoo  USE="css -static-libs" 101 KiB
[ebuild  N     ] media-libs/libvorbis-1.3.7-r2::gentoo  USE="-static-libs -test" 1176 KiB
[ebuild  N     ] media-libs/libass-0.17.5-r1:0/9::gentoo  USE="fontconfig libunibreak -test -verify-sig" 450 KiB
[ebuild  N     ] media-libs/libbluray-1.4.1:0/3::gentoo  USE="fontconfig truetype xml -aacs -bdplus -java -static-libs -utils" 458 KiB
[ebuild  N     ] media-libs/libvpx-1.16.0:0/12::gentoo  USE="highbitdepth -doc -postproc -static-libs -test" 5504 KiB
[ebuild  N     ] media-libs/speex-1.2.1-r2::gentoo  USE="vbr -utils -valgrind" CPU_FLAGS_X86="sse" 1019 KiB
[ebuild  N     ] media-libs/svt-av1-4.1.0:0/4::gentoo  USE="pgo -test -tools" CPU_FLAGS_X86="avx512vl" 47086 KiB
[ebuild  N     ] media-sound/lame-3.100-r3::gentoo  USE="frontend -debug -mp3rtp -sndfile -static-libs" CPU_FLAGS_X86="(-mmx)" 1489 KiB
[ebuild  N     ] media-libs/libdvdnav-7.0.0::gentoo  USE="-static-libs" 84 KiB
[ebuild  N     ] media-libs/libtheora-1.2.0-r1:0/2::gentoo  USE="encode -doc -examples -static-libs" 1786 KiB
[ebuild  N     ] media-video/handbrake-1.11.2-r1::gentoo  USE="fdk x265 -amf -gui -libdovi -numa -nvdec -nvenc -qsv -verify-sig" 26645 KiB

Total: 22 packages (22 new), Size of downloads: 104852 KiB