新建C++工程

新建

兩個externalNativeBuild

一個sourceSets（指定so路徑）

android { compileSdkVersion 29 buildToolsVersion '29.0.3' defaultConfig { ... externalNativeBuild { cmake { cppFlags '-std=c++11 -frtti -fexceptions' abiFilters ’armeabi-v7a’ } } sourceSets { main { jniLibs.srcDirs = [’src/main/jniLibs’] } } } ... externalNativeBuild { cmake { path 'src/main/cpp/CMakeLists.txt' version '3.10.2' } }}

復制so和include文件

編寫CMakeLists.txt

以下是默認值

cmake_minimum_required(VERSION 3.4.1)add_library(native-lib SHARED native-lib.cpp #nativ-lib2.cpp 如果有其他cpp文件可以一并打包到native-lib中)#查找系統的log庫，并賦值給變量log-libfind_library( log-lib log)#將上面log-lib變量里的庫連接到native-lib中target_link_libraries( native-lib ${log-lib})

CMakeLists中添加FFmpeg頭文件路徑

#設置FFmpeg頭文件的路徑include_directories( include#因為和CMakeLists.txt在同一級，所以直接寫include)

CMakeLists中添加libavcodec.so

#定義一個變量avcodecadd_library( avcodec SHARED IMPORTED)#給avcodec這個變量賦值set_target_properties(avcodec PROPERTIES IMPORTED_LOCATION ${CMAKE_SOURCE_DIR}/../../main/jniLibs/${ANDROID_ABI}/libavcodec.so)#將avcodec混合編譯到native-lib中target_link_libraries( native-lib ${log-lib} avcodec)

CMakeLists中添加全部的so

cmake_minimum_required(VERSION 3.4.1)#設置FFmpeg頭文件的路徑include_directories( include#因為和CMakeLists.txt在同一級，所以直接寫include)add_library(native-lib SHARED native-lib.cpp)find_library( log-lib log)#1.定義一個變量avcodecadd_library( avcodec SHARED IMPORTED)#給avcodec這個變量賦值set_target_properties(avcodec PROPERTIES IMPORTED_LOCATION ${CMAKE_SOURCE_DIR}/../../main/jniLibs/${ANDROID_ABI}/libavcodec-57.so)#2.add_library( avdevice SHARED IMPORTED)set_target_properties(avdevice PROPERTIES IMPORTED_LOCATION ${CMAKE_SOURCE_DIR}/../../main/jniLibs/${ANDROID_ABI}/libavdevice-57.so)#3.add_library( avfilter SHARED IMPORTED)set_target_properties(avfilter PROPERTIES IMPORTED_LOCATION ${CMAKE_SOURCE_DIR}/../../main/jniLibs/${ANDROID_ABI}/libavfilter-6.so)#4.add_library( avformat SHARED IMPORTED)set_target_properties(avformat PROPERTIES IMPORTED_LOCATION ${CMAKE_SOURCE_DIR}/../../main/jniLibs/${ANDROID_ABI}/libavformat-57.so)#5.add_library( avutil SHARED IMPORTED)set_target_properties(avutil PROPERTIES IMPORTED_LOCATION ${CMAKE_SOURCE_DIR}/../../main/jniLibs/${ANDROID_ABI}/libavutil-55.so)#6.add_library( postproc SHARED IMPORTED)set_target_properties(postproc PROPERTIES IMPORTED_LOCATION ${CMAKE_SOURCE_DIR}/../../main/jniLibs/${ANDROID_ABI}/libpostproc-54.so)#7.add_library( swresample SHARED IMPORTED)set_target_properties(swresample PROPERTIES IMPORTED_LOCATION ${CMAKE_SOURCE_DIR}/../../main/jniLibs/${ANDROID_ABI}/libswresample-2.so)#8.add_library( swscale SHARED IMPORTED)set_target_properties(swscale PROPERTIES IMPORTED_LOCATION ${CMAKE_SOURCE_DIR}/../../main/jniLibs/${ANDROID_ABI}/libswscale-4.so)#將avcodec混合編譯到native-lib中target_link_libraries( native-lib ${log-lib} avcodec#1 avdevice#2 avfilter#3 avformat#4 avutil#5 postproc#6 swresample#7 swscale#8)

編寫測試函數

#include <jni.h>#include <string>extern 'C' {#include 'libavcodec/avcodec.h'}extern 'C' JNIEXPORT jstring JNICALLJava_com_example_myffmpegcmd_MainActivity_stringFromJNI( JNIEnv *env, jobject /* this */) { std::string hello = 'Hello from C++'; return env->NewStringUTF(avcodec_configuration());}

總結

到此這篇關于Android Studio引入FFmpeg的文章就介紹到這了,更多相關Android Studio引入FFmpeg內容請搜索好吧啦網以前的文章或繼續瀏覽下面的相關文章希望大家以后多多支持好吧啦網！