$ equery u ffmpeg
+X
-abi_x86_32
+alsa
-amr
-amrenc
-bluray
-bs2b
+bzip2
-cdio
-celt
-chromaprint
-chromium
+cpu_flags_x86_3dnow
+cpu_flags_x86_3dnowext
+cpu_flags_x86_aes
+cpu_flags_x86_avx
+cpu_flags_x86_avx2
+cpu_flags_x86_fma3
+cpu_flags_x86_fma4
+cpu_flags_x86_mmx
+cpu_flags_x86_mmxext
+cpu_flags_x86_sse
+cpu_flags_x86_sse2
+cpu_flags_x86_sse3
+cpu_flags_x86_sse4_1
+cpu_flags_x86_sse4_2
+cpu_flags_x86_ssse3
+cpu_flags_x86_xop
-cpudetection
-debug
-doc
+encode
-fdk
+fftools_aviocat
+fftools_cws2fws
+fftools_ffescape
+fftools_ffeval
+fftools_ffhash
+fftools_fourcc2pixfmt
+fftools_graph2dot
+fftools_ismindex
+fftools_pktdumper
+fftools_qt-faststart
+fftools_sidxindex
+fftools_trasher
-flite
-fontconfig
-frei0r
-fribidi
-gcrypt
-gme
-gmp
-gnutls
+gpl
-gsm
+hardcoded-tables
+iconv
-iec61883
-ieee1394
-jack
+jpeg2k
-kvazaar
-ladspa
-libass
-libcaca
-libilbc
-librtmp
-libsoxr
-libv4l
-lzma
-modplug
+mp3
+network
-nvenc
-openal
+opengl
-openh264
-openssl
-opus
-oss
-pic
+postproc
-pulseaudio
-rubberband
-samba
-schroedinger
+sdl
-snappy
-sofalizer
-speex
-ssh
-static-libs
-test
-theora
+threads
+truetype
-twolame
-v4l
+vaapi
+vdpau
+vorbis
-vpx
-wavpack
-webp
+x264
-x265
+xcb
+xvid
-zeromq
+zimg
+zlib
-zvbi