android studio集成ffmpeg步骤

一、支持NDK开发

1.安装插件

2.project视图下src同级目录编写cmakelists.txt

所有第三方的so都放在app/libs目录下，并且在后续路径中指定该目录

内容如下

cmake_minimum_required(VERSION 3.6)

add_library( cgffmpeg
             SHARED
             src/main/cpp/CGFFmpeg.cpp
             src/main/cpp/CGFFmpegVideoDecoder.cpp
             src/main/cpp/CGGlobal.cpp
             )
#头文件路径
include_directories(libs/include)

add_library( avcodec SHARED IMPORTED)
set_target_properties( avcodec PROPERTIES IMPORTED_LOCATION ${CMAKE_SOURCE_DIR}/libs/${ANDROID_ABI}/libavcodec.so)

add_library( avfilter SHARED IMPORTED)
set_target_properties( avfilter PROPERTIES IMPORTED_LOCATION ${CMAKE_SOURCE_DIR}/libs/${ANDROID_ABI}/libavfilter.so)

add_library( avformat SHARED IMPORTED)
set_target_properties( avformat PROPERTIES IMPORTED_LOCATION ${CMAKE_SOURCE_DIR}/libs/${ANDROID_ABI}/libavformat.so)

add_library( avutil SHARED IMPORTED)
set_target_properties( avutil PROPERTIES IMPORTED_LOCATION ${CMAKE_SOURCE_DIR}/libs/${ANDROID_ABI}/libavutil.so)

add_library( fdk-aac SHARED IMPORTED)
set_target_properties( fdk-aac PROPERTIES IMPORTED_LOCATION ${CMAKE_SOURCE_DIR}/libs/${ANDROID_ABI}/libfdk-aac.so)

add_library( swresample SHARED IMPORTED)
set_target_properties( swresample PROPERTIES IMPORTED_LOCATION ${CMAKE_SOURCE_DIR}/libs/${ANDROID_ABI}/libswresample.so)

add_library( swscale SHARED IMPORTED)
set_target_properties( swscale PROPERTIES IMPORTED_LOCATION ${CMAKE_SOURCE_DIR}/libs/${ANDROID_ABI}/libswscale.so)

find_library( log-lib log )
target_link_libraries( cgffmpeg
                     avfilter
                     avcodec
                     avformat
                     avutil
                     fdk-aac
                     swresample
                     swscale
                     android
                     ${log-lib} )
3.module gradle添加支持

apply plugin: 'com.android.library'

android {
    compileSdkVersion 27

    defaultConfig {
        minSdkVersion 16
        targetSdkVersion 27
        versionCode 1
        versionName "1.0"

        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"

        sourceSets{
            main{
                jniLibs.srcDirs = ['libs']
            }
        }
        externalNativeBuild{
            cmake{
                cppFlags ""
            }
        }

        ndk{
            abiFilters 'armeabi-v7a','x86','x86_64'
        }
    }

    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }

    }

    externalNativeBuild {
        cmake {
            path "CMakeLists.txt"
        }
    }
}

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])

    implementation 'com.android.support:appcompat-v7:27.1.1'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'com.android.support.test:runner:1.0.2'
    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
    implementation project(path: ':utilslib')
}

二、开始进行ndk开发

1.module目录下创建libs目录，里面存放对应的so及头文件

2.module/src/main目录下创建cpp目录，里面存放native代码，这里需在cmakelists.txt add_library时与so名进行关联

3.module/src/main/java下创建工具类，在里面调用System.Loadlibrary 和定义native方法。