Error:(19, 32) libavutil/avstring.h: No such file or directory

[ouyangfeng]

why cannot find the directory

/Users/liushengfan/develop/github/jni/AndroidFFmpeg/library/src/main/jni/aes-protocol.c
Error:(19, 32) libavutil/avstring.h: No such file or directory
compilation terminated.
make: *** [/Users/liushengfan/develop/github/jni/AndroidFFmpeg/library/build/intermediates/ndk/release/obj/local/arm64-v8a/objs/ffmpeg-jni//Users/liushengfan/develop/github/jni/AndroidFFmpeg/library/src/main/jni/aes-protocol.o] Error 1
Error:Execution failed for task ':library:compileReleaseNdk'.

com.android.ide.common.process.ProcessException: org.gradle.process.internal.ExecException: Process 'command '/Users/liushengfan/develop/sdk/android-sdk/sdk/android-ndk-r10/ndk-build'' finished with non-zero exit value 2