Open-source licences

FFmpeg in the Android app

Version 1.5 and later of the app use an FFmpeg build with no GPL or non-free parts: every FFmpeg library in it reports “LGPL version 3 or later”. These are the exact versions:

The FFmpeg libraries (libavcodec, libavdevice, libavfilter, libavformat, libavutil, libswresample and libswscale) are separate shared libraries in the app's lib/<processor>/ folder, loaded when the app runs, so you can replace them with your own build. In the app, the same notices are under side menu › Open-source licences.

Source code

The source code that corresponds to the FFmpeg build in the app:

• FFmpeg n8.1.2: ffmpeg-8.1.2.tar.xz from ffmpeg.org (also the n8.1.2 tag).
• FFmpegKit build scripts, wrapper code and the changes they make to FFmpeg before compiling: tag android-apple-8.1.2 (tarball). On Android the scripts add FFmpegKit's Storage Access Framework support to libavformat/file.c, libavutil/file.c and libavutil/file.h. The versions of the libraries below are in its scripts/source.sh.
• FFmpegKit for Android 2.2.3: the library project at commit defe2b4. Its 48 prebuilt libraries are byte for byte the ones in the package.
• FFmpegKit Flutter plugin 2.5.7: pub.dev.
• GNU FriBidi 1.0.13 and GNU libiconv 1.18, the two LGPL v2.1 libraries built into FFmpeg: FriBidi, libiconv-1.18.tar.gz.

To rebuild the libraries, run SUDO= ./build-all.sh android video in the FFmpegKit tag with Android NDK r29 (API level 24).

Build settings

FFmpeg's configure options, exactly as stored in the arm64-v8a libavutil library (shown one option per line). The armeabi-v7a, x86 and x86_64 builds use the same options except the processor and toolchain ones.

--cross-prefix=aarch64-linux-android-
--sysroot=/Users/me/Library/Android/sdk/ndk/29.0.13113456/toolchains/llvm/prebuilt/darwin-x86_64/sysroot
--prefix=/Users/me/StudioProjects/ffmpeg-kit-6.0.LTS/prebuilt/android-arm64/ffmpeg
--pkg-config=/opt/homebrew/bin/pkg-config
--enable-version3
--arch=aarch64
--cpu=armv8-a
--target-os=android
--enable-neon
--enable-asm
--enable-inline-asm
--ar=llvm-ar
--cc=aarch64-linux-android24-clang
--cxx=aarch64-linux-android24-clang++
--ranlib=llvm-ranlib
--strip=llvm-strip
--nm=llvm-nm
--extra-libs='-L/Users/me/StudioProjects/ffmpeg-kit-6.0.LTS/prebuilt/android-arm64/cpu-features/lib
-lndk_compat'
--disable-autodetect
--enable-cross-compile
--enable-pic
--enable-jni
--enable-optimizations
--enable-swscale
--disable-static
--enable-shared
--enable-pthreads
--enable-v4l2-m2m
--disable-outdev=fbdev
--disable-indev=fbdev
--enable-small
--disable-xmm-clobber-test
--disable-debug
--enable-lto
--disable-neon-clobber-test
--disable-programs
--disable-doc
--disable-htmlpages
--disable-manpages
--disable-podpages
--disable-txtpages
--disable-sndio
--disable-schannel
--disable-securetransport
--disable-xlib
--disable-cuda
--disable-cuvid
--disable-nvenc
--disable-vaapi
--disable-vdpau
--disable-videotoolbox
--disable-audiotoolbox
--disable-appkit
--disable-alsa
--disable-cuda
--disable-cuvid
--disable-nvenc
--disable-vaapi
--disable-vdpau
--enable-libfontconfig
--enable-libfreetype
--enable-libfribidi
--enable-libass
--enable-iconv
--enable-libtheora
--enable-libvorbis
--enable-libvpx
--enable-libwebp
--enable-libdav1d
--enable-libkvazaar
--enable-libsnappy
--disable-sdl2
--enable-libzimg
--disable-openssl
--enable-libharfbuzz
--enable-zlib
--enable-mediacodec

libavutil license: LGPL version 3 or later

Ask us for the source

Email meruappsdev@gmail.com and we will send you a complete copy of the source code for FFmpeg, FFmpegKit and the LGPL libraries above, for no more than the cost of sending it. This offer stands for at least three years after we last distribute a version of the app that contains this build.

Libraries inside the FFmpeg build

These come with FFmpegKit for Android. LLVM libc++ ships as its own library (libc++_shared.so); the rest are built into the FFmpeg libraries. Their full licence texts are in the app under Open-source licences.

Portions of this software are copyright © 2024 The FreeType Project (freetype.org). All rights reserved.

The rest of the app

The app is built with Flutter. Flutter and the Dart packages the app uses are listed, each with its licence text, in the app under side menu › Open-source licences.

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