报错：
More than one file was found with OS independent path 'lib/arm64-v8a/libswscale.so'. If you are using jniLibs and CMake IMPORTED targets, see https://developer.android.com/studio/preview/features#automatic_packaging_of_prebuilt_dependencies_used_by_cmake
原因分析：
打包两次？
解决方法，在build.gradle增加
android{
packagingOptions {
pickFirst 'lib/arm64-v8a/*'
}
}
