首先，前提是將FFmpeg編譯生成庫，具體的FFmpeg編譯暫不做分享(涉及l(fā)ibfdk_aac,x264文章待續(xù)......)。
Android Studio2.2已經(jīng)可以通過cmake建立JNI項目，而且native debug也很方便，于是通過cmake移植FFmpeg至android平臺。

• 新建android項目，在src/main/目錄下，創(chuàng)建JniLibs目錄。并將動態(tài)庫添加到此目錄下，同時將FFMpeg編譯生成的include頭文件拷貝到cpp目錄下.

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• JNI頭文件生成
  編寫native方法，alt+enter 生成頭文件,實現(xiàn)簡單調(diào)用

  
  
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• 在JNI中涉及一以C與C++的混合調(diào)用，不要忘記添加extern "C"{},否則編譯會報錯

  
  
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• 因為只編譯armeabi-v7a平臺的動態(tài)庫，在CMakelists.txt文件中，通過配置文件添加依賴庫，注意build.gradle中不要忘記添加ndk配置，否則會鏈接失敗。

  
  
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• 以下為CMakelists.txt文件中的詳細配置

set(include-headers ${CMAKE_SOURCE_DIR}/src/main/cpp/include)       //定義變量，設(shè)置頭文件路徑
include_directories(${include-headers})//引用變量包含頭文件,否則編譯過程中找不到頭文件

add_library(avcodec SHARED IMPORTED)//添加動態(tài)庫
set_target_properties(avcodec PROPERTIES IMPORTED_LOCATION ${CMAKE_SOURCE_DIR}/src/main/jniLibs/armeabi-v7a/libavcodec-57.so)//動態(tài)庫的路徑

add_library(avdevice SHARED IMPORTED)
set_target_properties( avdevice
                       PROPERTIES
                       IMPORTED_LOCATION ${CMAKE_SOURCE_DIR}/src/main/jniLibs/armeabi-v7a/libavdevice-57.so )

 add_library(avfilter SHARED IMPORTED)
 set_target_properties( avfilter
                        PROPERTIES
                        IMPORTED_LOCATION ${CMAKE_SOURCE_DIR}/src/main/jniLibs/armeabi-v7a/libavfilter-6.so )

 add_library(avformat SHARED IMPORTED)
 set_target_properties( avformat
                        PROPERTIES
                        IMPORTED_LOCATION ${CMAKE_SOURCE_DIR}/src/main/jniLibs/armeabi-v7a/libavformat-57.so )

 add_library(avutil SHARED IMPORTED)
 set_target_properties( avutil
                        PROPERTIES
                        IMPORTED_LOCATION ${CMAKE_SOURCE_DIR}/src/main/jniLibs/armeabi-v7a/libavutil-55.so )

 add_library(postproc SHARED IMPORTED)
 set_target_properties( postproc
                        PROPERTIES
                        IMPORTED_LOCATION ${CMAKE_SOURCE_DIR}/src/main/jniLibs/armeabi-v7a/libpostproc-54.so )

 add_library(swresample SHARED IMPORTED)
 set_target_properties( swresample
                        PROPERTIES
                        IMPORTED_LOCATION ${CMAKE_SOURCE_DIR}/src/main/jniLibs/armeabi-v7a/libswresample-2.so )

 add_library(swscale SHARED IMPORTED)
 set_target_properties( swscale
                        PROPERTIES
                        IMPORTED_LOCATION ${CMAKE_SOURCE_DIR}/src/main/jniLibs/armeabi-v7a/libswscale-4.so )

add_library( # Sets the name of the library.
             native-lib
             # Sets the library as a shared library.
             SHARED
             # Provides a relative path to your source file(s).
             # Associated headers in the same location as their source
             # file are automatically included.
             src/main/cpp/native-lib.cpp )//通過源文件的形式，加入動態(tài)庫

#以上添加依賴的動態(tài)庫和源文件
#鏈接動態(tài)庫
target_link_libraries( # Specifies the target library.
                       native-lib

                       # Links the target library to the log library
                       # included in the NDK.
                       ${log-lib}
                        avcodec
                        avdevice
                        avfilter
                        avformat
                        avutil
                        postproc
                        swresample
                        swscale
                        )

ok，跑起......

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