前言

编译FFmpeg的Android版本，并整合到Android Studio。
系统：macOS Sierra 10.12。
NDK版本：r12b。
FFmpeg版本：3.1.3

编译FFmpeg的步骤

下载NDK。
下载ffmpeg源码，解压到NDK目录下的sources目录下。如图

WechatIMG9.jpeg

修改ffmpeg-3.1.3目录下的configure文件定位到3309行：如图：

![WechatIMG11.jpeg](http://upload-images.jianshu.io/upload_images/1157085-bdeacb1c2ef69c55.jpeg?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)

将

SLIBNAME_WITH_MAJOR='$(SLIBNAME).$(LIBMAJOR)'LIB_INSTALL_EXTRA_CMD='$$(RANLIB)"$(LIBDIR)/$(LIBNAME)"'SLIB_INSTALL_NAME='$(SLIBNAME_WITH_VERSION)'SLIB_INSTALL_LINKS='$(SLIBNAME_WITH_MAJOR) $(SLIBNAME)'

改成

SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)$(LIBMAJOR)$(SLIBSUF)'LIB_INSTALL_EXTRA_CMD='$$(RANLIB) "$(LIBDIR)/$(LIBNAME)"'SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'SLIB_INSTALL_LINKS='$(SLIBNAME)'

目的是将生成.so名称规范化，用以满足android build。

在当前目录下新建一个build_android.sh文件，如图：

WechatIMG13.jpeg

内容为：

#!/bin/bashNDK=/Users/maimingliang/Documents/NDK/android-ndk-r12bSYSROOT=$NDK/platforms/android-15/arch-arm/TOOLCHAIN=$NDK/toolchains/arm-linux-androideabi-4.9/prebuilt/darwin-x86_64function build_one{./configure \ --prefix=$PREFIX \ --enable-shared \ --disable-static \ --disable-doc \ --disable-ffmpeg \ --disable-ffplay \ --disable-ffprobe \ --disable-ffserver \ --disable-avdevice \ --disable-doc \ --disable-symver \ --cross-prefix=$TOOLCHAIN/bin/arm-linux-androideabi- \ --target-os=linux \ --arch=arm \ --enable-cross-compile \ --sysroot=$SYSROOT \ --extra-cflags="-Os -fpic $ADDI_CFLAGS" \ --extra-ldflags="$ADDI_LDFLAGS" \ $ADDITIONAL_CONFIGURE_FLAGmake cleanmakemake install}CPU=armPREFIX=$(pwd)/android/$CPU ADDI_CFLAGS="-marm"build_one

打开终端并且把路径切换到build_android 所在的目录，执行命令

./build_android.sh

完成编译以后，进入生成的android文件夹，在arm文件夹里面新建一个Android.mk文件，内容为：

LOCAL_PATH:= $(call my-dir) include $(CLEAR_VARS)LOCAL_MODULE:= libavcodecLOCAL_SRC_FILES:= lib/libavcodec-57.soLOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/includeinclude $(PREBUILT_SHARED_LIBRARY) include $(CLEAR_VARS)LOCAL_MODULE:= libavformatLOCAL_SRC_FILES:= lib/libavformat-57.soLOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/includeinclude $(PREBUILT_SHARED_LIBRARY) include $(CLEAR_VARS)LOCAL_MODULE:= libswscaleLOCAL_SRC_FILES:= lib/libswscale-4.soLOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/includeinclude $(PREBUILT_SHARED_LIBRARY) include $(CLEAR_VARS)LOCAL_MODULE:= libavutilLOCAL_SRC_FILES:= lib/libavutil-55.soLOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/includeinclude $(PREBUILT_SHARED_LIBRARY) include $(CLEAR_VARS)LOCAL_MODULE:= libavfilterLOCAL_SRC_FILES:= lib/libavfilter-6.soLOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/includeinclude $(PREBUILT_SHARED_LIBRARY) include $(CLEAR_VARS)LOCAL_MODULE:= libswresampleLOCAL_SRC_FILES:= lib/libswresample-2.soLOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/includeinclude $(PREBUILT_SHARED_LIBRARY)

至此FFmpeg的编译完成，下面整合到Android Studio 中：

配置Android Studio

在local.properties加入ndk的路径，我这里是：

ndk.dir=/Users/maimingliang/Documents/NDK/android-ndk-r12b

也可以在project structure 中添加。如图所示：

WechatIMG14.jpeg

在build.gradle 文件中添加图中标红处的内容。

WechatIMG21.jpeg

配置javah，ndk-build ，ndk-build clean 命令

WechatIMG15.jpeg

添加javah命令:

![Uploading WechatIMG17_232544.jpeg . . .]

program：$JDKPath$/bin/javah
paramers：-classpath $Classpath$ -v -jni $FileClass$
working diretory : $ModuleFileDir$/src/main/jni

添加 ndk-build

IMG_4113.JPG

program：/Users/maimingliang/Documents/NDK/android-ndk-r12b/build/ndk-build //这里要修改你的ndk路径的ndk-build
paramers：
working diretory : $ModuleFileDir$/src/main/jni

添加 ndk-build clean

IMG_4114.JPG

program：/Users/maimingliang/Documents/NDK/android-ndk-r12b/build/ndk-build //这里要修改你的ndk路径的 ndk-build
paramers：clean
working diretory : $ProjectFileDir$/app/src/main

编写 C文件
编写Android.mk文件
编写Application.mk文件。
运行 javah，ndk-build ndk-build clean 命令

IMG_4115.JPG IMG_4116.JPG

END.

Android(安卓)Studio编译FFmpeg

前言

编译FFmpeg的步骤

配置Android Studio

添加javah命令:

添加 ndk-build

添加 ndk-build clean

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