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

Calculating dependencies ... done!
Dependency resolution took 2.42 s (backtrack: 0/20).

[ebuild  N     ] dev-build/b2-5.5.3::gentoo  USE="-examples" 1198 KiB
[ebuild  N     ] dev-libs/libunibreak-8.0:0/8::gentoo  USE="-doc -man -static-libs -test" 1063 KiB
[ebuild  N     ] media-libs/alsa-topology-conf-1.2.5.1-r1::gentoo  USE="-verify-sig" 12 KiB
[ebuild  N     ] media-libs/alsa-ucm-conf-1.2.16.1::gentoo  USE="-verify-sig" 83 KiB
[ebuild  N     ] dev-lang/duktape-2.7.0-r3:0/2.7.0::gentoo  1003 KiB
[ebuild  N     ] media-libs/giflib-6.1.3:0/7::gentoo  USE="-doc -static-libs" 460 KiB
[ebuild  N     ] sys-libs/mtdev-1.1.7::gentoo  295 KiB
[ebuild  N     ] media-libs/x264-0.0.20240513-r1:0/164::gentoo  USE="interlaced -opencl -static-libs" 822 KiB
[ebuild  N     ] media-libs/openh264-2.6.0:0/8::gentoo  USE="plugin -test -utils" CPU_FLAGS_X86="avx2" 58900 KiB
[ebuild   R    ] sys-libs/zlib-1.3.2-r1:0/1::gentoo  USE="minizip* -static-libs -verify-sig" 1290 KiB
[ebuild  N     ] acct-group/rtkit-0-r3::gentoo  0 KiB
[ebuild  N     ] media-libs/rnnoise-0.4.1_p20250222:0/0.4.1::gentoo  USE="-doc -examples" CPU_FLAGS_X86="avx2 sse4_1" 57312 KiB
[ebuild  N     ] app-text/hunspell-1.7.2-r1:0/1.7::gentoo  USE="ncurses nls readline -static-libs" L10N="-af -bg -ca -cs -cy -da -de -de-1901 -el -en -eo -es -et -fo -fr -ga -gl -he -hr -hu -ia -id -is -it -kk -km -ku -lt -lv -mi -mk -ms -nb -nl -nn -pl -pt -pt-BR -ro -ru -sk -sl -sq -sv -sw -tn -uk -zu" 1501 KiB
[ebuild  N     ] dev-lang/yasm-1.3.0-r2::gentoo  USE="nls" 1458 KiB
[ebuild  N     ] acct-group/polkitd-0-r3::gentoo  0 KiB
[ebuild  N     ] acct-group/plugdev-0-r3::gentoo  0 KiB
[ebuild  N     ] virtual/minizip-1.3.1:0/1::gentoo  USE="-static-libs" 0 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/xvid-1.3.7-r2::gentoo  USE="-examples" 683 KiB
[ebuild  N     ] acct-user/rtkit-0-r3::gentoo  0 KiB
[ebuild  N     ] acct-user/polkitd-0-r3::gentoo  0 KiB
[ebuild  N     ] dev-cpp/expected-lite-0.10.0::gentoo  USE="-test" 57 KiB
[ebuild  N     ] dev-cpp/ada-4.0.0:0/4::gentoo  513 KiB
[ebuild  N     ] dev-libs/qr-code-generator-1.8.0-r1:0/1::gentoo  USE="-test" 195 KiB
[ebuild  N     ] net-libs/tdlib-1.8.66:0/1.8.66::gentoo  USE="tde2e -test" 5650 KiB
[ebuild  N     ] dev-cpp/expected-1.3.1::gentoo  24 KiB
[ebuild  N     ] dev-cpp/ms-gsl-4.2.1::gentoo  USE="-test" 61 KiB
[ebuild  N     ] dev-cpp/range-v3-0.12.0-r1::gentoo  USE="-test" 570 KiB
[ebuild  N     ] net-libs/libssh-0.12.2:0/4::gentoo  USE="sftp zlib -debug -examples -fido2 -gssapi -mbedtls -pcap -server -static-libs -test -verify-sig" 742 KiB
[ebuild  N     ] media-libs/x265-4.3:0/217::gentoo  USE="10bit 12bit cet -numa -test -vmaf" 2005 KiB
[ebuild  N     ] dev-libs/crc32c-1.1.2-r2::gentoo  USE="-test" 30 KiB
[ebuild  N     ] kde-frameworks/extra-cmake-modules-6.31.0::gentoo  USE="-doc -test" 339 KiB
[ebuild  N     ] dev-libs/double-conversion-3.4.0:0/3::gentoo  USE="-test" 6871 KiB
[ebuild  N     ] dev-libs/md4c-0.6.0::gentoo  USE="md2html -test" 263 KiB
[ebuild  N     ] dev-libs/libcbor-0.14.0:0/0.14::gentoo  USE="-doc -test" 310 KiB
[ebuild  N     ] dev-cpp/abseil-cpp-20260107.1:0/2601.1.0-cpp20::gentoo  USE="-debug -test -test-helpers" 2251 KiB
[ebuild  N     ] media-libs/alsa-lib-1.2.16.1::gentoo  USE="python -debug -doc -verify-sig" PYTHON_SINGLE_TARGET="python3_14 -python3_12 -python3_13 (-python3_15)" 1104 KiB
[ebuild  N     ] dev-libs/boost-1.91.0-r2:0/1.91.0::gentoo  USE="bzip2 context nls python stacktrace zlib -debug -doc -icu -lzma -mpi -numpy -test -test-full -tools -zstd" PYTHON_TARGETS="python3_14 -python3_12 -python3_13" 199785 KiB
[ebuild  N     ] dev-libs/protobuf-34.2:0/34.2.0::gentoo  USE="libprotoc (libupb) protobuf protoc zlib -conformance -debug -emacs -examples -test" 6872 KiB
[ebuild  N     ] x11-libs/xcb-util-renderutil-0.3.10::gentoo  256 KiB
[ebuild  N     ] dev-cpp/cppgir-2.0_p20260518::gentoo  USE="-doc -test" 157 KiB
[ebuild  N     ] x11-libs/xcb-util-wm-0.4.2::gentoo  279 KiB
[ebuild  N     ] x11-libs/xcb-util-0.4.1::gentoo  262 KiB
[ebuild  N     ] x11-libs/xcb-util-image-0.4.1::gentoo  283 KiB
[ebuild  N     ] dev-cpp/cld3-3.0.13_p20220331:0/3.0.13_p20220331::gentoo  701 KiB
[ebuild  N     ] x11-apps/xprop-1.2.8::gentoo  144 KiB
[ebuild  N     ] x11-libs/libXv-1.0.13::gentoo  USE="-doc" 275 KiB
[ebuild  N     ] x11-libs/xcb-util-cursor-0.1.6::gentoo  267 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     ] app-arch/lz4-1.10.0-r1:0/1.10.0-meson::gentoo  USE="-static-libs -test" 379 KiB
[ebuild  N     ] x11-libs/libpciaccess-0.19::gentoo  USE="zlib -static-libs" 64 KiB
[ebuild  N     ] media-libs/dav1d-1.5.4:0/7::gentoo  USE="8bit 10bit asm -test -xxhash" 1015 KiB
[ebuild  N     ] net-libs/libsrtp-2.6.0:2/1::gentoo  USE="openssl -debug -doc -nss -static-libs -test" 626 KiB
[ebuild  N     ] x11-apps/xset-1.2.6::gentoo  143 KiB
[ebuild  N     ] dev-libs/libevdev-1.13.7::gentoo  USE="-doc -test" 462 KiB
[ebuild  N     ] x11-misc/xkeyboard-config-2.48::gentoo  USE="-test" 931 KiB
[ebuild  N     ] x11-libs/libXcomposite-0.4.7::gentoo  USE="-doc" 267 KiB
[ebuild  N     ] x11-libs/libXdamage-1.1.7::gentoo  260 KiB
[ebuild  N     ] x11-libs/libXtst-1.2.5::gentoo  USE="-doc" 285 KiB
[ebuild  N     ] media-libs/libwebp-1.6.0:0/7::gentoo  USE="gif jpeg opengl png tiff -static-libs -swap-16bit-csp" CPU_FLAGS_X86="avx2 sse2 sse4_1" 4196 KiB
[ebuild  N     ] media-libs/libass-0.17.5-r1:0/9::gentoo  USE="fontconfig libunibreak -test -verify-sig" 450 KiB
[ebuild  N     ] media-video/ffmpeg-8.1.3:0/60.62.62::gentoo  USE="X alsa bzip2 cairo dav1d drm fontconfig gmp gnutls gpl jpeg2k libass opengl openssl opus ssh truetype vpx x264 x265 xml xvid zlib -amf -amr -amrenc (-appkit) -bluray -bs2b -cdio -chromaprint -chromium -codec2 -cuda-clang -doc -dvd -fdk -flite -frei0r -fribidi -gcrypt -gme -gsm -iec61883 -ieee1394 -jack -jpegxl -kvazaar -ladspa -lame -lcms -libaom -libaribb24 -libcaca -libilbc -liblc3 -libplacebo -librtmp -libsoxr -lv2 -lzma -modplug -nvenc -ocr -openal -opencl -opencolorio -openh264 -openmpt -pulseaudio -qrcode -qsv -quirc -rabbitmq -rav1e -rist -rubberband -samba -sdl -snappy -sndio -soc -sofa -speex -srt -svg -svt-av1 -theora -twolame -v4l -vaapi -vdpau -verify-sig -vidstab -vmaf -vorbis -vulkan -webp -zeromq -zimg -zvbi" 11458 KiB
[ebuild  N     ] media-libs/tg_owt-0_pre20260803:0/20260803::gentoo  USE="X -screencast" 11858 KiB
[ebuild  N     ] x11-libs/libxkbcommon-1.13.2::gentoo  USE="X -doc -static-libs -test -tools -wayland" 1215 KiB
[ebuild   R    ] app-text/xmlto-0.0.28-r11::gentoo  USE="text* -latex" 125 KiB
[ebuild  N     ] x11-misc/xdg-utils-1.2.1-r11::gentoo  USE="X dbus -doc -gnome -perl -plasma" 287 KiB
[ebuild  N     ] kde-frameworks/kf-env-6:6::gentoo  0 KiB
[ebuild  N     ] dev-libs/libfido2-1.17.0:0/1::gentoo  USE="-hidapi -nfc -smartcard -static-libs -test" 694 KiB
[ebuild  N     ] sys-auth/polkit-126-r3::gentoo  USE="nls pam -elogind -examples -gtk -introspection -kde (-selinux) (-systemd) -test" 446 KiB
[ebuild  N     ] dev-libs/libinput-1.32.0:0/10::gentoo  USE="-doc -lua -test" INPUT_DEVICES="-wacom" LUA_SINGLE_TARGET="lua5-4" 944 KiB
[ebuild  N     ] sys-apps/hwloc-2.12.2:0/15::gentoo  USE="X cairo cpuid pci -cuda -debug -doc -l0 -nvml -rocm (-selinux) -static-libs -svg -udev -valgrind -xml" VIDEO_CARDS="-nvidia" 5504 KiB
[ebuild  N     ] sys-auth/rtkit-0.14::gentoo  USE="(-selinux) (-systemd)" 41 KiB
[ebuild  N     ] dev-cpp/toomanycooks-1.6.1::gentoo  228 KiB
[ebuild  N     ] media-libs/openal-1.25.2::gentoo  USE="alsa dbus (-coreaudio) -debug -gui -jack -oss -pipewire -portaudio -pulseaudio -sdl -sndio" CPU_FLAGS_X86="sse sse2 sse4_1" 1107 KiB
[ebuild  N     ] dev-qt/qtbase-6.11.2-r2:6/6.11.2::gentoo  USE="X concurrent dbus gui icu libinput network nls opengl sql sqlite ssl udev widgets xml (zstd) -accessibility -brotli -cups -custom-cflags -eglfs -evdev -gles2-only -gssapi -gtk -io-uring (-journald) -libproxy -mysql -oci8 -odbc -postgres -renderdoc -sctp -syslog -test -tslib -vulkan -wayland" 49398 KiB
[ebuild  N     ] dev-qt/qttools-6.11.2:6/6.11.2::gentoo  USE="assistant linguist opengl qdbus widgets (zstd) -custom-cflags -designer -distancefieldgenerator -gles2-only -kmap2qmap -pixeltool -qdoc -qml -qmlls -qtattributionsscanner -qtdiag -qtplugininfo -vulkan" LLVM_SLOT="22 -17 -18 -19 -20 -21" 9992 KiB
[ebuild  N     ] dev-qt/qttranslations-6.11.2:6/6.11.2::gentoo  USE="-custom-cflags" 1652 KiB
[ebuild  N     ] dev-qt/qtshadertools-6.11.2:6/6.11.2::gentoo  USE="-custom-cflags -test" 1189 KiB
[ebuild  N     ] dev-qt/qtimageformats-6.11.2:6/6.11.2::gentoo  USE="-custom-cflags -mng -test" 2003 KiB
[ebuild  N     ] dev-qt/qtsvg-6.11.2:6/6.11.2::gentoo  USE="-custom-cflags -test" 2287 KiB
[ebuild  N     ] dev-qt/qtdeclarative-6.11.2-r1:6/6.11.2::gentoo  USE="jit network opengl sql ssl widgets -accessibility -custom-cflags -qmlls -svg -vulkan -wayland" 37872 KiB
[ebuild  N     ] kde-frameworks/kcoreaddons-6.31.0:6/6.31::gentoo  USE="dbus -debug -test" 2470 KiB
[ebuild  N     ] net-im/telegram-desktop-7.1.2-r1::gentoo  USE="X dbus fonts -enchant -screencast -wayland -webkit" 79570 KiB

Total: 83 packages (81 new, 2 reinstalls), Size of downloads: 601459 KiB

The following USE changes are necessary to proceed:
 (see "package.use" in the portage(5) man page for more details)
# required by net-im/telegram-desktop-7.1.2-r1::gentoo
# required by =net-im/telegram-desktop-7.1.2-r1 (argument)
>=media-video/ffmpeg-8.1.3 opus vpx
# required by kde-frameworks/kcoreaddons-6.31.0::gentoo
# required by net-im/telegram-desktop-7.1.2-r1::gentoo
# required by =net-im/telegram-desktop-7.1.2-r1 (argument)
>=dev-qt/qtbase-6.11.2-r2 icu
# required by x11-misc/xdg-utils-1.2.1-r11::gentoo
# required by kde-frameworks/kf-env-6::gentoo
# required by kde-frameworks/kcoreaddons-6.31.0::gentoo
# required by net-im/telegram-desktop-7.1.2-r1::gentoo
# required by =net-im/telegram-desktop-7.1.2-r1 (argument)
>=app-text/xmlto-0.0.28-r11 text
# required by virtual/minizip-1.3.1::gentoo[-static-libs]
# required by net-im/telegram-desktop-7.1.2-r1::gentoo
# required by =net-im/telegram-desktop-7.1.2-r1 (argument)
>=sys-libs/zlib-1.3.2-r1 minizip

 * In order to avoid wasting time, backtracking has terminated early
 * due to the above autounmask change(s). The --autounmask-backtrack=y
 * option can be used to force further backtracking, but there is no
 * guarantee that it will produce a solution.