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Android Studio引入FFmpeg的方法

作者：张雨明

这篇文章主要介绍了Android Studio引入FFmpeg的方法，本文通过实例代码给大家介绍的非常详细，对大家的学习或工作具有一定的参考借鉴价值,需要的朋友可以参考下

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

在这里插入图片描述

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-lib
find_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avcodec
add_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avcodec
add_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 JNICALL
Java_com_example_myffmpegcmd_MainActivity_stringFromJNI(
 JNIEnv *env,
 jobject /* this */) {
 std::string hello = "Hello from C++";
 return env->NewStringUTF(avcodec_configuration());
}

在这里插入图片描述

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内容请搜索脚本之家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脚本之家！

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