nix web.sh

FFmpegKitNext uses these Web entrypoints:

• Recommended Nix wrapper: ./nix-web.sh -p PROFILE [OPTION]... [VAR=VALUE]...
• Direct script: ./scripts/start-web.sh [OPTION]... [VAR=VALUE]...

The build options are the same for both entrypoints. The Nix wrapper also supports -p, --profile and --list-profiles.

By default, the Web build enables wasm32, WebAssembly SIMD and pthreads. No optional external libraries are enabled by default.

Usage with Nix:

./nix-web.sh -p web-wasm32-emscripten [OPTION]... [VAR=VALUE]...

Usage without Nix:

./scripts/start-web.sh [OPTION]... [VAR=VALUE]...

Specify environment variables as VARIABLE=VALUE to override default build options.

General Options

Option	Description
-h, --help	Display help and exit
-v, --version	Display version information and exit
-d, --debug	Build with debug information
-s, --speed	Optimize for speed instead of size
-f, --force	Ignore warnings
--jobs=N	Number of jobs to run, default is auto
--package-name=name	Set FFmpegKit package name in the native build
--no-ffmpeg-kit-protocols	Disable custom ffkitmem and ffkitstream protocols

Nix Wrapper Options

Option	Description
-p PROFILE, --profile PROFILE	Nix develop profile to use
--list-profiles	List local Nix develop profiles

Licensing Options

Option	Description
--enable-gpl	Allow building GPL libraries. Created binaries will be licensed under GPL v3.0

Architectures

Option	Description
--disable-wasm32	Do not build wasm32

Web Options

Option	Description
--static	Build static archives and link one main WebAssembly module
--enable-pthreads	Build with Emscripten pthread support. Enabled by default
--disable-pthreads	Build FFmpeg core without pthread support. Requires --skip-ffmpeg-kit
--enable-relaxed-simd	Add -mrelaxed-simd for experimental optimized builds

Platform Libraries

--enable-web-libiconv
--enable-web-zlib

Common External Libraries

Each option enables the matching external library.

--full
--enable-chromaprint
--enable-dav1d
--enable-fontconfig
--enable-freetype
--enable-fribidi
--enable-gmp
--enable-gnutls
--enable-harfbuzz
--enable-kvazaar
--enable-lame
--enable-libaom
--enable-libass
--enable-libjxl
--enable-liblc3
--enable-libsvtav1
--enable-libilbc
--enable-libtheora
--enable-libvorbis
--enable-libvpx
--enable-libwebp
--enable-libxml2
--enable-opencore-amr
--enable-openh264
--enable-openssl
--enable-opus
--enable-sdl
--enable-shine
--enable-snappy
--enable-soxr
--enable-speex
--enable-srt
--enable-tesseract
--enable-twolame
--enable-vo-amrwbenc
--enable-vvenc
--enable-zimg

--full enables all non-GPL external libraries. With --enable-gpl, it also enables GPL libraries.

GPL Libraries

These options require --enable-gpl.

--enable-libvidstab
--enable-rubberband
--enable-x264
--enable-x265
--enable-xvidcore

Custom Libraries

Custom library indexes start at 1 and must be consecutive.

Option	Description
--enable-custom-library-[n]-name=value	Name of the custom library
--enable-custom-library-[n]-repo=value	Git repository of the source code
--enable-custom-library-[n]-repo-commit=value	Git commit to download
--enable-custom-library-[n]-repo-tag=value	Git tag to download
--enable-custom-library-[n]-package-config-file-name=value	Package config file installed by the custom build script
--enable-custom-library-[n]-ffmpeg-enable-flag=value	Library name used by FFmpeg configure
--enable-custom-library-[n]-license-file=value	License file path relative to the library source folder

Advanced Options

Option	Description
--reconf-LIBRARY	Run autoreconf before building LIBRARY
--redownload-LIBRARY	Download LIBRARY even if it is already downloaded
--rebuild-LIBRARY	Build LIBRARY even if it is already built
--skip-LIBRARY	Skip LIBRARY during the build
--disable-lib-LIBRARY	Disable LIBRARY after enabled-library resolution
--version-LIBRARY=n	Override default LIBRARY version
--no-output-redirection	Print build output directly instead of redirecting detailed output to build.log
--no-workspace-cleanup-LIBRARY	Keep LIBRARY workspace files after the build
--extra-cflags=value	Append extra C compiler flags
--extra-cxxflags=value	Append extra C++ flags
--extra-ldflags=value	Append extra linker flags