Under linux mint 17.4, you can choose any OS, even cygwin.

1. download android ndk, in this document, I used “android-ndk-r14b”
2. download ffmpeg source, http://www.ffmpeg.org/download
3. unzip ndk
4. make standalone compiler

   • $NDK/build/tools/make-standalone-toolchian.sh --platform=android-21 --install-dir=~/home/android_toolchain

   • “android-21” means minimum sdk, 21 is android 6.0 marshmallow
5. make android build script
   • in $FFMPEG directory,

   • NDK=/home/kjkim/android-ndk-r14b
     SYSROOT=$NDK/platforms/android-21/arch-arm
     TOOLCHAIN=/home/kjkim/android_toolchain
     function build_one
     {
     ./configure \
         --prefix=$PREFIX \
         --enable-shared \
         --disable-static \
         --disable-doc \
         --disable-ffmpeg \
         --disable-ffplay \
         --disable-ffprobe \
         --disable-ffserver \
         --disable-avdevice \
         --disable-doc \
         --disable-symver \
         --cross-prefix=$TOOLCHAIN/bin/arm-linux-androideabi- \
         --target-os=linux \
         --arch=arm \
         --enable-cross-compile \
         --sysroot=$SYSROOT \
         --extra-cflags="-Os -fpic $ADDI_CFLAGS" \
         --extra-ldflags="$ADDI_LDFLAGS" \
         $ADDITIONAL_CONFIGURE_FLAG
     make clean
     make
     make install
     }
     CPU=arm
     PREFIX=$(pwd)/android/$CPU
     ADDI_CFLAGS="-marm"
     build_one