root ~ # ACCEPT_KEYWORDS=~amd64 emerge -pvt ffmpeg
These are the packages that would be merged, in reverse order:
Calculating dependencies... done!
[ebuild R ] media-video/ffmpeg-4.4.2:0/56.58.58::gentoo USE="X alsa bzip2 dav1d encode gnutls gpl iconv jpeg2k lzma mp3 network opengl opus postproc pulseaudio sdl svg theora threads truetype vorbis vpx webp x264 xvid zlib -amf -amr -amrenc (-appkit) -bluray -bs2b -cdio -chromaprint -chromium -codec2 -cpudetection -cuda -debug -doc -fdk -flite -fontconfig -frei0r -fribidi -gcrypt -gme -gmp -gsm -hardcoded-tables -iec61883 -ieee1394 -jack…