新建C++工程

新建

两个externalNativeBuild

一个sourceSets（指定so路径）

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" } }}

复制so和include文件

编写CMakeLists.txt

以下是默认值

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)#查找系统的log库，并赋值给变量log-libfind_library( log-lib log)#将上面log-lib变量里的库连接到native-lib中target_link_libraries( native-lib ${log-lib})

CMakeLists中添加FFmpeg头文件路径

#设置FFmpeg头文件的路径include_directories( include#因为和CMakeLists.txt在同一级，所以直接写include)

CMakeLists中添加libavcodec.so

#定义一个变量avcodecadd_library( avcodec SHARED IMPORTED)#给avcodec这个变量赋值set_target_properties(avcodec PROPERTIES IMPORTED_LOCATION ${CMAKE_SOURCE_DIR}/../../main/jniLibs/${ANDROID_ABI}/libavcodec.so)#将avcodec混合编译到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)#设置FFmpeg头文件的路径include_directories( include#因为和CMakeLists.txt在同一级，所以直接写include)add_library(native-lib SHARED native-lib.cpp)find_library( log-lib log)#1.定义一个变量avcodecadd_library( avcodec SHARED IMPORTED)#给avcodec这个变量赋值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)#将avcodec混合编译到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)

编写测试函数

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

总结

到此这篇关于Android Studio引入FFmpeg的文章就介绍到这了,更多相关Android Studio引入FFmpeg内容请搜索以前的文章或继续浏览下面的相关文章希望大家以后多多支持！