~ $ equery u ffmpeg [ Legend : U - final flag setting for installation] [ : I - package is installed with flag ] [ Colors : set, unset ] * Found these USE flags for media-video/ffmpeg-3.3.1: U I + + X : Add support for X11 + + abi_x86_32 : 32-bit (x86) libraries + + alsa : Add support for media-libs/alsa-lib (Advanced Linux Sound Architecture) - - amr : Enables Adaptive Multi-Rate Audio support - - amrenc : Enables Adaptive Multi-Rate Audio encoding support with media-libs/vo-amrwbenc. + + bluray : Enable playback of Blu-ray filesystems - - bs2b : Enables media-libs/libbs2b based Bauer stereo-to-binaural filter. + + bzip2 : Use the bzlib compression library - - cdio : Enables audio CD grabbing with dev-libs/libcdio. - - celt : Adds Xiph CELT audio decoding support via media-libs/celt - - chromaprint : Enables audio fingerprinting support with media-libs/chromaprint. - - cpu_flags_x86_3dnow : Use the 3DNow! instruction set - - cpu_flags_x86_3dnowext : Use the Enhanced 3DNow! instruction set + + cpu_flags_x86_aes : Enable support for Intel's AES instruction set (AES-NI) + + cpu_flags_x86_avx : Adds support for Advanced Vector Extensions instructions + + cpu_flags_x86_avx2 : Adds support for Advanced Vector Extensions 2 instructions + + cpu_flags_x86_fma3 : Use the Fused Multiply Add 3 instruction set ([fma] in cpuinfo) - - cpu_flags_x86_fma4 : Use the Fused Multiply Add 4 instruction set + + cpu_flags_x86_mmx : Use the MMX instruction set + + cpu_flags_x86_mmxext : Use the Extended MMX instruction set (a subset of SSE) ([mmxext] or [sse] in cpuinfo) + + cpu_flags_x86_sse : Use the SSE instruction set + + cpu_flags_x86_sse2 : Use the SSE2 instruction set + + cpu_flags_x86_sse3 : Use the SSE3 instruction set ([pni] in cpuinfo, NOT ssse3) + + cpu_flags_x86_sse4_1 : Enable SSE4.1 instruction support + + cpu_flags_x86_sse4_2 : Enable SSE4.2 instruction support + + cpu_flags_x86_ssse3 : Use the SSSE3 instruction set (NOT sse3/pni) - - cpu_flags_x86_xop : Enable the XOP instruction set - - cpudetection : Enables runtime CPU detection (useful for bindist, compatibility on other CPUs) - - debug : Enable extra debug codepaths, like asserts and extra output. If you want to get meaningful backtraces see https://wiki.gentoo.org/wiki/Project:Quality_Assurance/Backtraces - - doc : Add extra documentation (API, Javadoc, etc). It is recommended to enable per package instead of globally + + encode : Add support for encoding of audio or video files + + fdk : Use external fdk-aac library for AAC encoding + + fftools_aviocat : cat's a URL to another one, useful for dumping streams. + + fftools_cws2fws : converts cws files (Macromedia Flash, compressed) to fws ones (Macromedia Flash, uncompressed). + + fftools_ffescape : Escapes an input string, adopting the av_get_token() escaping logic. + + fftools_ffeval : A simple expression evalutor. + + fftools_ffhash : Computes a file's digest using libavutil algorithms. + + fftools_fourcc2pixfmt : Shows the relationships between rawvideo pixel formats and FourCC tags. + + fftools_graph2dot : A tool to convert a libavfilter graph to a dot file. + + fftools_ismindex : A tool for creating smooth streaming manifests. + + fftools_pktdumper : Dumps packets as demuxed by libavformat. + + fftools_qt-faststart : Rearranges a Quicktime file to facilitate network streaming. + + fftools_sidxindex : Write an MPD file for fragmented MP4 files with a sidx index at the start of the file. + + fftools_trasher : Writes burts of random data into a file. Great for testing error robustness/resilience/concealment. - - flite : Adds a text-to-speech filter based on app-accessibility/flite. + + fontconfig : Support for configuring and customizing font access via media-libs/fontconfig - - frei0r : Enable frei0r wrapping in libavfilter - - fribidi : Enables fribidi support in the drawtext filter. - - gcrypt : Enables gcrypt support: Needed for rtmp(t)e support if openssl, librtmp or gmp is not used. - - gme : Enables support for media-libs/game-music-emu for playing various video game music formats. - - gmp : Add support for dev-libs/gmp (GNU MP library) - - gnutls : Add support for net-libs/gnutls (TLS 1.0 and SSL 3.0 support) + + gpl : Build GPL code. Should be enabled unless you require LGPL binaries. - - gsm : Add support for the gsm lossy speech compression codec + + hardcoded-tables : Use pre-calculated tables rather than calculating them on the fly. + + iconv : Enable support for the iconv character set conversion library - - iec61883 : Support for FireWire DV/HDV input device using media-libs/libiec61883. - - ieee1394 : Enable FireWire/iLink IEEE1394 support (dv, camera, ...) - - jack : Add support for the JACK Audio Connection Kit - - jpeg2k : Support for JPEG 2000, a wavelet-based image compression format - - kvazaar : Enables media-libs/kvazaar based HEVC encoder. - - ladspa : Enable the ability to support ladspa plugins + + libass : SRT/SSA/ASS (SubRip / SubStation Alpha) subtitle support - - libcaca : Add support for colored ASCII-art graphics - - libilbc : Enables iLBC de/encoding via media-libs/libilbc. + + libressl : Use dev-libs/libressl as SSL provider (might need ssl USE flag), packages should not depend on this USE flag - - librtmp : Enables Real Time Messaging Protocol using librtmp (media-video/rtmpdump) in addition to FFmpeg's native implementation. - - libsoxr : Enables audio resampling through media-libs/soxr. - - libv4l : Uses media-libs/libv4l for video4linux instead of direct calls. Adds support for more devices via the userspace library. + + lzma : Support for LZMA (de)compression algorithm - - modplug : Add libmodplug support for playing SoundTracker-style music files + + mp3 : Add support for reading mp3 files + + network : Enables network streaming support - - nvenc : Adds support for NVIDIA Encoder (NVENC) API for hardware accelerated encoding on NVIDIA cards. + + openal : Add support for the Open Audio Library + + opengl : Add support for OpenGL (3D graphics) - - openh264 : Enables H.264 encoding suppoprt via media-libs/openh264. + + openssl : Enables dev-libs/openssl support. Adds support for encrypted network protocols (TLS/HTTPS). - - opus : Adds (decoding) support for the Opus codec via media-libs/opus. - - oss : Add support for OSS (Open Sound System) - - pic : Force shared libraries to be built as PIC (this is slower) + + postproc : Build and install libpostproc. - - pulseaudio : Add support for PulseAudio sound server - - rubberband : Adds time-stretching and pitch-shifting audio filter based on media-libs/rubberband. - - samba : Add support for SAMBA (Windows File and Printer sharing) - - schroedinger : Enable Dirac video support (an advanced royalty-free video compression format) via libschroedinger (high-speed implementation in C of the Dirac codec). + + sdl : Add support for Simple Direct Layer (media library) - - snappy : Enable app-arch/snappy support. Required for e.g. Vidvox Hap encoder. - - sofalizer : Enables Sofalizer filter - - speex : Add support for the speex audio codec (used for speech) - - ssh : Enable SSH/sftp support via net-libs/libssh. - - static-libs : Build static versions of dynamic libraries as well - - test : Workaround to pull in packages needed to run with FEATURES=test. Portage-2.1.2 handles this internally, so don't set it in make.conf/package.use anymore - - theora : Add support for the Theora Video Compression Codec + + threads : Add threads support for various packages. Usually pthreads + + truetype : Add support for FreeType and/or FreeType2 fonts - - twolame : Enables MP2 encoding via media-sound/twolame as an alternative to the internal encoder. + + v4l : Enable support for video4linux (using linux-headers or userspace libv4l libraries) - - vaapi : Enable Video Acceleration API for hardware decoding + + vdpau : Enable the Video Decode and Presentation API for Unix acceleration interface + + vorbis : Add support for the OggVorbis audio codec - - vpx : Enables vp8 codec support using libvpx: Decoding vp8 does not require this to be enabled but libvpx can also be used for decoding; encoding vp8 requires this useflag to be enabled though. - - wavpack : Add support for wavpack audio compression tools + + webp : Enables WebP encoding with media-libs/libwebp. + + x264 : Enable h264 encoding using x264 + + x265 : Enables HEVC encoding with media-libs/x265. + + xcb : Support the X C-language Binding, a replacement for Xlib + + xvid : Add support for xvid.org's open-source mpeg-4 codec - - zeromq : Enables net-libs/zeromq support with the zmq/azmq filters. - - zimg : Enables media-libs/zimg based scale filter. + + zlib : Add support for zlib (de)compression - - zvbi : Enables media-libs/zvbi based teletext decoder.