118 [root@lasagna ~]  emerge -pqv '=media-video/ffmpeg-4.2.3::gentoo'
 * WARNING: The FEATURES variable contains one or more values that
 * should be disabled under normal circumstances: keepwork
[ebuild   R   ] media-video/ffmpeg-4.2.3  USE="X alsa amr amrenc bluray bzip2 ch
romaprint codec2 encode fontconfig frei0r gcrypt gme gmp gnutls gpl gsm iconv jp
eg2k kvazaar ladspa libass libcaca libilbc libressl librtmp libsoxr lzma mp3 net
work openal openh264 opus pic postproc rubberband sdl snappy speex ssh svg theor
a threads truetype twolame vaapi vdpau vorbis vpx wavpack x264 x265 xvid zimg zl
ib zvbi (-appkit) -bs2b -cdio -chromium -cpudetection (-cuda) -dav1d -debug -doc
 -fdk -flite -fribidi -hardcoded-tables -iec61883 -ieee1394 -jack -libaom -libar
ibb24 -libdrm -libtesseract -libv4l -libxml2 -lv2 (-mipsdspr1) (-mipsdspr2) (-mi
psfpu) (-mmal) -modplug -opencl -opengl -openssl -oss -pulseaudio -samba -srt -s
tatic-libs -test -v4l -vidstab -webp -zeromq (-altivec%)" CPU_FLAGS_X86="3dnow 3
dnowext aes avx fma3 fma4 mmx mmxext sse sse2 sse3 sse4_1 sse4_2 ssse3 xop -avx2
" FFTOOLS="aviocat cws2fws ffescape ffeval ffhash fourcc2pixfmt graph2dot ismind
ex pktdumper qt-faststart sidxindex trasher" VIDEO_CARDS="-nvidia" 

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