tested-version:

• ffmpeg tag: n2.8.6 (af21d609a0ddeeddad4fdefecb19fd4e13744f80)
• x264: 90a61ec76424778c050524f682a33f115024be96

• Install git
• Install Android NDK (tested with ndk20、ndk21、ndk22), do not use NDK23 by now
• Install yasm, nasm (via brew install nasm yasm or apt install nasm yasm -y...)

1. $ export NDK=/path/to/your/android-ndk
2. $ ./build_android.sh
3. $ cd jni && $NDK/ndk-build
4. The libffmpeg.so is in the folder libs