$ emerge -vp ffmpeg

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

Calculating dependencies  ... done!
Dependency resolution took 2.16 s (backtrack: 0/20).

[ebuild   R    ] media-video/ffmpeg-6.1.1-r5:0/58.60.60::gentoo  USE="X alsa bzip2 dav1d encode gnutls gpl iconv lcms mp3 network opengl opus pic postproc pulseaudio sdl svg threads truetype v4l vaapi vdpau vorbis vulkan x264 xvid zlib (-amf) -amr -amrenc (-appkit) -bluray -bs2b -cdio -chromaprint -chromium -codec2 -cpudetection (-cuda) -debug -doc -fdk -flite -fontconfig -frei0r -fribidi -gcrypt -glslang -gme -gmp -gsm -hardcoded-tables -iec61883 -ieee1394 -jack -jpeg2k -jpegxl -kvazaar -ladspa -libaom -libaribb24 -libass -libcaca -libdrm -libilbc -libplacebo -librtmp -libsoxr -libtesseract -libv4l -libxml2 -lv2 -lzma (-mipsdspr1) (-mipsdspr2) (-mipsfpu) -modplug -nvenc -openal -opencl -openh264 -openssl -oss (-qsv) -rav1e -rubberband -samba -shaderc -snappy -sndio -soc -speex -srt -ssh -static-libs -svt-av1 -test -theora -twolame -verify-sig -vidstab (-vmaf) -vpx -webp -x265 -zeromq -zimg -zvbi" ABI_X86="32 (64) (-x32)" CPU_FLAGS_X86="aes avx avx2 fma3 mmx mmxext sse sse2 sse3 sse4_1 sse4_2 ssse3 -3dnow -3dnowext -fma4 -xop" FFTOOLS="aviocat cws2fws ffescape ffeval ffhash fourcc2pixfmt graph2dot ismindex pktdumper qt-faststart sidxindex trasher" 0 KiB

Total: 1 package (1 reinstall), Size of downloads: 0 KiB