- 引入工程，编写cmake和app.build
- fftool文件夹里的文件暂没引入
编译安装app，报错
error: 'type-name' cannot be signed or unsigned
源代码是这个unsigned avutil_version(void);
直接从编译好的include里面拖过来的
我将我以前的工程里面的moudle拖过来使用，一切正常按照我的想法运行的。
#CMAKELIST.TXT 内容
cmake_minimum_required(VERSION 3.4.1)
include_directories(
${CMAKE_SOURCE_DIR}/
${CMAKE_SOURCE_DIR}/include
)
#定义全局 my_source_path 变量
file(GLOB my_source_path
${CMAKE_SOURCE_DIR}/*.cpp
${CMAKE_SOURCE_DIR}/*.c
)
add_library(
native-lib
SHARED
${my_source_path})
add_library(avcodec SHARED IMPORTED)
add_library(avdevice SHARED IMPORTED)
add_library(avfilter SHARED IMPORTED)
add_library(avformat SHARED IMPORTED)
add_library(avutil SHARED IMPORTED)
add_library(swresample SHARED IMPORTED)
add_library(swscale SHARED IMPORTED)
set_target_properties(avcodec PROPERTIES IMPORTED_LOCATION ${CMAKE_SOURCE_DIR}/../jniLibs/${ANDROID_ABI}/libavcodec.so)
set_target_properties(avdevice PROPERTIES IMPORTED_LOCATION ${CMAKE_SOURCE_DIR}/../jniLibs/${ANDROID_ABI}/libavdevice.so)
set_target_properties(avfilter PROPERTIES IMPORTED_LOCATION ${CMAKE_SOURCE_DIR}/../jniLibs/${ANDROID_ABI}/libavfilter.so)
set_target_properties(avformat PROPERTIES IMPORTED_LOCATION ${CMAKE_SOURCE_DIR}/../jniLibs/${ANDROID_ABI}/libavformat.so)
set_target_properties(avutil PROPERTIES IMPORTED_LOCATION ${CMAKE_SOURCE_DIR}/../jniLibs/${ANDROID_ABI}/libavutil.so)
set_target_properties(swresample PROPERTIES IMPORTED_LOCATION ${CMAKE_SOURCE_DIR}/../jniLibs/${ANDROID_ABI}/libswresample.so)
set_target_properties(swscale PROPERTIES IMPORTED_LOCATION ${CMAKE_SOURCE_DIR}/../jniLibs/${ANDROID_ABI}/libswscale.so)
find_library(
log-lib
log)
target_link_libraries( # Specifies the target library.
native-lib
avcodec
avdevice
avfilter
avformat
avutil
swresample
swscale
# Links the target library to the log library
# included in the NDK.
${log-lib})
当我不使用ffmpeg的时候，自己写一些cpp代码，返回string一切正常
可引入ffmpeg并使用的时候就出错了。
