# ffmpeg_build

**Repository Path**: louisZzz/ffmpeg_build

## Basic Information

- **Project Name**: ffmpeg_build
- **Description**: 在MacOS上编译FFMPEG
- **Primary Language**: Unknown
- **License**: Not specified
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 0
- **Created**: 2018-12-12
- **Last Updated**: 2022-02-17

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

## 前提
1. 系统OSX
2. ffmpeg版本号n4.4


## 静态库和动态库CMakeList文件


    #本文件是最终版本
    cmake_minimum_required(VERSION 3.10)


    find_library(log-lib log)

    add_library(avutil STATIC IMPORTED)
    set_target_properties(avutil PROPERTIES IMPORTED_LOCATION ${CMAKE_SOURCE_DIR}/src/main/cpp/libs/${ANDROID_ABI}/libavutil.a)

    #
    add_library(avcodec STATIC IMPORTED)
    set_target_properties(avcodec PROPERTIES IMPORTED_LOCATION ${CMAKE_SOURCE_DIR}/src/main/cpp/libs/${ANDROID_ABI}/libavcodec.a)



    #
    #
    add_library(avformat STATIC IMPORTED)
    set_target_properties(avformat PROPERTIES IMPORTED_LOCATION ${CMAKE_SOURCE_DIR}/src/main/cpp/libs/${ANDROID_ABI}/libavformat.a)





    include_directories(src/main/cpp src/main/cpp/libs/${CMAKE_ANDROID_ARCH_ABI}/include/)

    add_library(ffmpeg_jni
            SHARED
            src/main/cpp/ffmpeg_jni.cpp)

    #target_link_libraries(ffmpeg_jni ${log-lib} avcodec avformat avutil swresample swscale )
    target_link_libraries(ffmpeg_jni  ${log-lib} avformat  avcodec avutil m z )


### 1. 静态库报错


    src/libavcodec/cscd.c:96: error: undefined reference to 'uncompress'
    src/libavcodec/dxa.c:250: error: undefined reference to 'uncompress'
    src/libavcodec/exr.c:203: error: undefined reference to 'uncompress'
    src/libavcodec/exr.c:697: error: undefined reference to 'uncompress'
    src/libavcodec/exrenc.c:329: error: undefined reference to 'compress'
    src/libavcodec/flashsv.c:126: error: undefined reference to 'inflateInit_'
    src/libavcodec/flashsv.c:258: error: undefined reference to 'deflateInit_'
    src/libavcodec/flashsv.c:260: error: undefined reference to 'deflateBound'
    src/libavcodec/flashsv.c:261: error: undefined reference to 'deflateEnd'
    src/libavcodec/flashsv.c:190: error: undefined reference to 'inflateReset'
    src/libavcodec/flashsv.c:157: error: undefined reference to 'inflate'
    src/libavcodec/flashsv.c:159: error: undefined reference to 'deflateInit_'
    src/libavcodec/flashsv.c:165: error: undefined reference to 'deflate'
    src/libavcodec/flashsv.c:166: error: undefined reference to 'deflateEnd'
    src/libavcodec/flashsv.c:168: error: undefined reference to 'inflateReset'
    src/libavcodec/flashsv.c:177: error: undefined reference to 'inflate'
    src/libavcodec/flashsv.c:206: error: undefined reference to 'inflate'
    src/libavcodec/flashsv.c:209: error: undefined reference to 'inflateSync'
    src/libavcodec/flashsv.c:210: error: undefined reference to 'inflate'
    src/libavcodec/flashsv.c:107: error: undefined reference to 'inflateEnd'
    src/libavcodec/flashsv2enc.c:361: error: undefined reference to 'compress2'
    src/libavcodec/flashsv2enc.c:373: error: undefined reference to 'deflateInit_'
    src/libavcodec/flashsv2enc.c:382: error: undefined reference to 'deflate'
    src/libavcodec/flashsv2enc.c:391: error: undefined reference to 'deflate'
    src/libavcodec/flashsv2enc.c:392: error: undefined reference to 'deflateEnd'
    src/libavcodec/flashsvenc.c:174: error: undefined reference to 'compress2'
    src/libavcodec/flashsvenc.c:174: error: undefined reference to 'compress2'
    src/libavcodec/flashsvenc.c:174: error: undefined reference to 'compress2'
    src/libavcodec/lcldec.c:615: error: undefined reference to 'inflateInit_'
    src/libavcodec/lcldec.c:134: error: undefined reference to 'inflateReset'
    src/libavcodec/lcldec.c:134: error: undefined reference to 'inflateReset'
    src/libavcodec/lcldec.c:634: error: undefined reference to 'inflateEnd'
    src/libavcodec/lclenc.c:151: error: undefined reference to 'deflateInit_'
    src/libavcodec/lclenc.c:71: error: undefined reference to 'deflateBound'
    src/libavcodec/lclenc.c:81: error: undefined reference to 'deflateReset'
    src/libavcodec/lclenc.c:92: error: undefined reference to 'deflate'
    src/libavcodec/lclenc.c:165: error: undefined reference to 'deflateEnd'
    src/libavcodec/lscrdec.c:141: error: undefined reference to 'inflateInit_'
    src/libavcodec/lscrdec.c:216: error: undefined reference to 'inflateEnd'
    src/libavcodec/lscrdec.c:226: error: undefined reference to 'inflateEnd'
    src/libavcodec/mscc.c:232: error: undefined reference to 'inflateInit_'
    src/libavcodec/pngenc.c:1092: error: undefined reference to 'deflateInit2_'
    src/libavcodec/pngenc.c:532: error: undefined reference to 'deflateBound'
    src/libavcodec/pngenc.c:862: error: undefined reference to 'deflateBound'
    src/libavcodec/pngenc.c:520: error: undefined reference to 'deflateReset'
    src/libavcodec/tiffenc.c:179: error: undefined reference to 'compress'
    src/libavcodec/zmbvenc.c:269: error: undefined reference to 'deflateReset'
    clang++: error: linker command failed with exit code 1 (use -v to see invocation)
    ninja: build stopped: subcommand failed.

- 解决方案：增加libz.so，**动态库不需要**

### 2.静态库必须按照顺序进行导入

    - 案例分析 : avcodec 模块 ( 音视频编解码 ) 需要依赖 avformat 模块 ( 音频封装格式 ) ; 因此 , 导入 FFMPEG 函数库时 , avcodec 模块 必须在 avformat 模块之后 ;
    #错误例子
    target_link_libraries(ffmpeg_jni ${log-lib} avcodec avutil avformat )

    - 推荐顺序 : ① avfilter , ② avformat , ③ avcodec , ④ avutil , ⑤ swresample , ⑥ swscale 
    #静态库引入
    avfilter
    avformat
    avcodec
    avutil
    swresample
    swscale