External Libraries

FFmpegKitNext builds FFmpegKit, FFmpeg and optional external libraries. Enable optional libraries with --enable-LIBRARY, or use --full to enable the non-GPL set supported by the selected platform.

Dependencies listed below are enabled automatically by the build scripts when the parent library is enabled.

External Libraries

Library	Role	Auto-enabled dependencies
chromaprint	Audio fingerprinting through Chromaprint/AcoustID support.	-
dav1d	AV1 decoder.	-
fontconfig	Font discovery and font configuration for text/subtitle rendering.	expat, libiconv, libuuid, freetype
freetype	Font rasterization used by text and subtitle features.	zlib, libpng, libjxl
fribidi	Bidirectional Unicode text handling.	-
gmp	Multiple-precision arithmetic, also used by crypto dependencies.	-
gnutls	TLS/HTTPS support.	zlib, nettle, gmp, libiconv
harfbuzz	Complex text shaping.	freetype
kvazaar	HEVC/H.265 encoder.	-
lame	MP3 encoder through libmp3lame.	libiconv
libaom	AV1 encoder/decoder.	-
libass	ASS/SSA subtitle rendering.	expat, libuuid, freetype, fribidi, fontconfig, harfbuzz, libiconv
libiconv	Character set conversion.	-
libilbc	iLBC speech codec.	-
libjxl	JPEG XL image codec.	-
liblc3	LC3 audio codec.	-
libsvtav1	SVT-AV1 encoder.	-
libtheora	Theora video codec.	libogg, libvorbis
libvorbis	Vorbis audio codec.	libogg
libvpx	VP8/VP9 video codec.	cpu-features on Android
libwebp	WebP image codec.	giflib, jpeg, libpng, tiff
libxml2	XML parsing support for FFmpeg formats/protocols that need XML.	libiconv
opencore-amr	AMR-NB audio codec.	-
openh264	H.264 support through OpenH264.	cpu-features on Android
openssl	TLS/crypto support and dependency for srt.	-
opus	Opus audio codec.	-
sdl	SDL2 output device support.	Android links OpenSL ES
shine	Fixed-point MP3 encoder.	-
snappy	Snappy compression support.	zlib
soxr	High-quality audio resampling.	-
speex	Speex audio codec.	-
srt	Secure Reliable Transport protocol.	openssl
tesseract	OCR filter support.	leptonica, libwebp, giflib, jpeg, zlib, tiff, libpng
twolame	MPEG Layer II audio encoder.	libsndfile
vo-amrwbenc	AMR-WB audio encoder.	-
vvenc	VVC/H.266 encoder.	-
zimg	zscale and related resize/colorspace filtering.	-

GPL Libraries

These libraries require --enable-gpl.

Library	Role	Auto-enabled dependencies
libvidstab	Video stabilization filters through vid.stab (--enable-libvidstab).	-
rubberband	Time-stretching and pitch-shifting audio filters.	libsndfile, libsamplerate
x264	H.264 encoder.	-
x265	HEVC/H.265 encoder.	-
xvidcore	MPEG-4 Part 2 video encoder through libxvid.	-

Supplementary Packages

Supplementary packages are built only to satisfy dependencies of enabled libraries. They are not usually enabled directly as FFmpeg features.

Package	Used for
cpu-features	Android CPU feature detection support used by libraries such as libvpx and openh264.
expat	XML parsing dependency for fontconfig and libass.
giflib	GIF image support for libwebp, leptonica and tesseract.
jpeg	JPEG support through libjpeg-turbo.
leptonica	Image processing dependency for tesseract.
libogg	Ogg container dependency for libvorbis and libtheora.
libpng	PNG support used by image/font/subtitle dependencies.
libsamplerate	Sample-rate conversion dependency for rubberband.
libsndfile	Audio file I/O dependency for twolame and rubberband.
libuuid	UUID support used by fontconfig and libass.
nettle	Crypto dependency for gnutls; built against gmp in this project.
rapidjson	Header-only JSON parser used by the Linux and Web FFmpegKit C++ API/media information parser; downloaded by Linux and Web builds.
tiff	TIFF image support; depends on jpeg.
zlib	Compression support used by several libraries and platform builds.

Platform Libraries

Some options enable platform or system libraries instead of downloading a third-party source package.

• Android: android-zlib, android-media-codec
• iOS / iPadOS: AudioToolbox, AVFoundation, bzip2, libiconv, VideoToolbox, zlib
• macOS: AudioToolbox, AVFoundation, bzip2, Core Image, libiconv, OpenCL, OpenGL, VideoToolbox, zlib
• tvOS: AudioToolbox, bzip2, libiconv, VideoToolbox, zlib
• visionOS: AudioToolbox, bzip2, libiconv, VideoToolbox, zlib
• Linux: linux-* options link supported libraries from the host pkg-config environment, such as ALSA, VAAPI, V4L2 and system-provided codec/filter libraries. Linux builds also download rapidjson for FFmpegKit's C++ API.
• Web: web-libiconv, web-zlib. Web builds also download rapidjson for FFmpegKit's C++ API.