编译没保错，但是没有安卓目录怎么回事

问题遇到的现象和发生背景

./build_android.sh 后没有报错，只有一个warnning,跟视频上的一样，

问题相关代码，请勿粘贴截图

License: GPL version 2 or later
Creating configuration files ...
libavutil/avconfig.h is unchanged
libavcodec/bsf_list.c is unchanged
libavformat/protocol_list.c is unchanged

WARNING: /usr/ffmpeg/android-ndk-r14b/toolchains/x86-4.9/prebuilt/linux-x86_64/bin/i686-linux-android-pkg-config not found, library detection may fail.
Makefile:206: tests/Makefile: No such file or directory
make: *** No rule to make target 'tests/Makefile'. Stop.
Makefile:206: tests/Makefile: No such file or directory
make: *** No rule to make target 'tests/Makefile'. Stop.
Makefile:206: tests/Makefile: No such file or directory
make: *** No rule to make target 'tests/Makefile'. Stop.
build ffmpeg for x86 finished

运行结果及报错内容

我的解答思路和尝试过的方法

没有看见目录下生成了Android目录，也无从拷贝

我想要达到的结果

换个版本的ndk吧