1.下載FFmpeg-3.3.1源碼 解壓

2.配置環境變量，在電腦/Users/zhangyipeng/目錄下創建.bash_profile文件（已有此文件無需創建），打開文件加入如下配置：

//大家替換成自己的NDK目錄就好了，我這里使用的是android studio上下載的ndk目錄
export ANDROID_HOME=/Users/zhangyipeng/Library/Android/sdk
export ANDROID_NDK_HOME=$ANDROID_HOME/ndk-bundle
export PATH=${PATH}:$ANDROID_HOME/platform-tools 
export PATH=$PATH:$ANDROID_NDK_HOME

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4.編譯前需要修改ffmpeg-3.3.1目錄下的configure文件，修改如下所示：

注釋前四行掉，然后換成沒有注釋的

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

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5.在ffmpeg-3.3.1目錄下創建文件build_android.sh，打開終端，進入ffmpeg-3.3.1目錄，執行如下命令，使此文件可執行

chmod +x build_android.sh

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文件內容如下：

#!/bin/bash
# NDK的路徑，根據自己的安裝位置進行設置
NDK=/Users/zhangyipeng/Library/Android/sdk/ndk-bundle
# 編譯針對的平臺，可以根據自己的需求進行設置
# 這里選擇最低支持android-14, arm架構，生成的so庫是放在。
# libs/armeabi文件夾下的，若針對x86架構，要選擇arch-x86
PLATFORM=$NDK/platforms/android-14/arch-arm
# 工具鏈的路徑，根據編譯的平臺不同而不同
# arm-linux-androideabi-4.9與上面設置的PLATFORM對應，4.9為工具的版本號，
# 根據自己安裝的NDK版本來確定，一般使用最新的版本
TOOLCHAIN=$NDK/toolchains/arm-linux-androideabi-4.9/prebuilt/darwin-x86_64
function build_one
{
./configure \
    --prefix=$PREFIX \
    --target-os=linux \
    --cross-prefix=$TOOLCHAIN/bin/arm-linux-androideabi- \
    --arch=arm \
    --sysroot=$PLATFORM \
    --extra-cflags="-I$PLATFORM/usr/include" \
    --cc=$TOOLCHAIN/bin/arm-linux-androideabi-gcc \
    --nm=$TOOLCHAIN/bin/arm-linux-androideabi-nm \
    --enable-shared \
    --enable-runtime-cpudetect \
    --enable-gpl \
    --enable-small \
    --enable-cross-compile \
    --disable-debug \
    --disable-static \
    --disable-doc \
    --disable-asm \
    --disable-ffmpeg \
    --disable-ffplay \
    --disable-ffprobe \
    --disable-ffserver \
    --disable-postproc \
    --disable-avdevice \
    --disable-symver \
    --disable-stripping \
$ADDITIONAL_CONFIGURE_FLAG
sed -i '' 's/HAVE_LRINT 0/HAVE_LRINT 1/g' config.h
sed -i '' 's/HAVE_LRINTF 0/HAVE_LRINTF 1/g' config.h
sed -i '' 's/HAVE_ROUND 0/HAVE_ROUND 1/g' config.h
sed -i '' 's/HAVE_ROUNDF 0/HAVE_ROUNDF 1/g' config.h
sed -i '' 's/HAVE_TRUNC 0/HAVE_TRUNC 1/g' config.h
sed -i '' 's/HAVE_TRUNCF 0/HAVE_TRUNCF 1/g' config.h
sed -i '' 's/HAVE_CBRT 0/HAVE_CBRT 1/g' config.h
sed -i '' 's/HAVE_RINT 0/HAVE_RINT 1/g' config.h
make clean
make -j4
make install
}
# arm v7vfp
CPU=armv7-a
OPTIMIZE_CFLAGS="-mfloat-abi=softfp -mfpu=vfp -marm -march=$CPU "
PREFIX=./android/$CPU-vfp
ADDITIONAL_CONFIGURE_FLAG=
build_one
# CPU=armv
# PREFIX=$(pwd)/android/$CPU
# ADDI_CFLAGS="-marm"
# build_one
#arm v6
#CPU=armv6
#OPTIMIZE_CFLAGS="-marm -march=$CPU"
#PREFIX=./android/$CPU 
#ADDITIONAL_CONFIGURE_FLAG=
#build_one
#arm v7vfpv3
# CPU=armv7-a
# OPTIMIZE_CFLAGS="-mfloat-abi=softfp -mfpu=vfpv3-d16 -marm -march=$CPU "
# PREFIX=./android/$CPU
# ADDITIONAL_CONFIGURE_FLAG=
# build_one
#arm v7n
#CPU=armv7-a
#OPTIMIZE_CFLAGS="-mfloat-abi=softfp -mfpu=neon -marm -march=$CPU -mtune=cortex-a8"
#PREFIX=./android/$CPU 
#ADDITIONAL_CONFIGURE_FLAG=--enable-neon
#build_one
#arm v6+vfp
#CPU=armv6
#OPTIMIZE_CFLAGS="-DCMP_HAVE_VFP -mfloat-abi=softfp -mfpu=vfp -marm -march=$CPU"
#PREFIX=./android/${CPU}_vfp 
#ADDITIONAL_CONFIGURE_FLAG=
#build_one

6.執行build_android.sh，開始編譯ffmpeg成.so動態庫
命令如下：

./build_android.sh

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7.大概等10~20分鐘，編譯完成，在ffmpeg-3.3.1目錄下會生成一個名為android的文件夾，動態庫就在這個目錄之中，如圖所示

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8.如上圖所示，會生成6個動態庫，當然我們如果覺得動態庫太多，使用麻煩，也可以只生成一個動態庫，方法如下，我們可以再ffmpeg-3.3.1下再創建一個build_android_all.sh文件，重新執行上述步驟，就可以生成1個名為libffmpeg.so的庫

build_android_all.sh文件文件內容如下：

#!/bin/bash
# NDK的路徑，根據自己的安裝位置進行設置
NDK=/Users/zhangyipeng/Library/Android/sdk/ndk-bundle
# 編譯針對的平臺，可以根據自己的需求進行設置
# 這里選擇最低支持android-14, arm架構，生成的so庫是放在
# libs/armeabi文件夾下的，若針對x86架構，要選擇arch-x86
PLATFORM=$NDK/platforms/android-14/arch-arm
# 工具鏈的路徑，根據編譯的平臺不同而不同
# arm-linux-androideabi-4.9與上面設置的PLATFORM對應，4.9為工具的版本號，
# 根據自己安裝的NDK版本來確定，一般使用最新的版本
TOOLCHAIN=$NDK/toolchains/arm-linux-androideabi-4.9/prebuilt/darwin-x86_64
function build_one
{
./configure \
    --prefix=$PREFIX \
    --target-os=linux \
    --cross-prefix=$TOOLCHAIN/bin/arm-linux-androideabi- \
    --arch=arm \
    --sysroot=$PLATFORM \
    --extra-cflags="-I$PLATFORM/usr/include" \
    --cc=$TOOLCHAIN/bin/arm-linux-androideabi-gcc \
    --nm=$TOOLCHAIN/bin/arm-linux-androideabi-nm \
    --disable-shared \
    --enable-runtime-cpudetect \
    --enable-gpl \
    --enable-small \
    --enable-cross-compile \
    --disable-debug \
    --enable-static \
    --disable-doc \
    --disable-asm \
    --disable-ffmpeg \
    --disable-ffplay \
    --disable-ffprobe \
    --disable-ffserver \
    --disable-postproc \
    --disable-avdevice \
    --disable-symver \
    --disable-stripping \
$ADDITIONAL_CONFIGURE_FLAG
sed -i '' 's/HAVE_LRINT 0/HAVE_LRINT 1/g' config.h
sed -i '' 's/HAVE_LRINTF 0/HAVE_LRINTF 1/g' config.h
sed -i '' 's/HAVE_ROUND 0/HAVE_ROUND 1/g' config.h
sed -i '' 's/HAVE_ROUNDF 0/HAVE_ROUNDF 1/g' config.h
sed -i '' 's/HAVE_TRUNC 0/HAVE_TRUNC 1/g' config.h
sed -i '' 's/HAVE_TRUNCF 0/HAVE_TRUNCF 1/g' config.h
sed -i '' 's/HAVE_CBRT 0/HAVE_CBRT 1/g' config.h
sed -i '' 's/HAVE_RINT 0/HAVE_RINT 1/g' config.h
make clean
make -j4
make install
$TOOLCHAIN/bin/arm-linux-androideabi-ld \
-rpath-link=$PLATFORM/usr/lib \
-L$PLATFORM/usr/lib \
-L$PREFIX/lib \
-soname libffmpeg.so -shared -nostdlib -Bsymbolic --whole-archive --no-undefined -o \
$PREFIX/libffmpeg.so \
    libavcodec/libavcodec.a \
    libavfilter/libavfilter.a \
    libswresample/libswresample.a \
    libavformat/libavformat.a \
    libavutil/libavutil.a \
    libswscale/libswscale.a \
    -lc -lm -lz -ldl -llog --dynamic-linker=/system/bin/linker \
    $TOOLCHAIN/lib/gcc/arm-linux-androideabi/4.9/libgcc.a
}
# arm v7vfp
CPU=armv7-a
OPTIMIZE_CFLAGS="-mfloat-abi=softfp -mfpu=vfp -marm -march=$CPU "
PREFIX=./android/$CPU-vfp-all
ADDITIONAL_CONFIGURE_FLAG=
build_one
# CPU=armv
# PREFIX=$(pwd)/android/$CPU
# ADDI_CFLAGS="-marm"
# build_one
#arm v6
#CPU=armv6
#OPTIMIZE_CFLAGS="-marm -march=$CPU"
#PREFIX=./android/$CPU
#ADDITIONAL_CONFIGURE_FLAG=
#build_one
#arm v7vfpv3
# CPU=armv7-a
# OPTIMIZE_CFLAGS="-mfloat-abi=softfp -mfpu=vfpv3-d16 -marm -march=$CPU "
# PREFIX=./android/$CPU
# ADDITIONAL_CONFIGURE_FLAG=
# build_one
#arm v7n
#CPU=armv7-a
#OPTIMIZE_CFLAGS="-mfloat-abi=softfp -mfpu=neon -marm -march=$CPU -mtune=cortex-a8"
#PREFIX=./android/$CPU
#ADDITIONAL_CONFIGURE_FLAG=--enable-neon
#build_one
#arm v6+vfp
#CPU=armv6
#OPTIMIZE_CFLAGS="-DCMP_HAVE_VFP -mfloat-abi=softfp -mfpu=vfp -marm -march=$CPU"
#PREFIX=./android/${CPU}_vfp
#ADDITIONAL_CONFIGURE_FLAG=
#build_one

9.在ffmpeg-3.3.1目錄下執行如下命令：

chmod +x build_android_all.sh
./build_android_all.sh

10.執行完成后，生成了一個名為libffmpeg.so的動態庫，如下圖所示：

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11.這個動態庫其實是相當于把上面六個動態庫合并在一起了，所以使用效果一致，使用起來也更為便捷。
從上圖可以看出build_android_all.sh腳本的作用其實是先生成6個靜態庫，然后再把這幾個靜態庫（就是那6個.a文件）合并成一個動態庫libffmpeg.so，而build_android.sh其實是直接生成了6個動態庫。我們下面對比下這兩個腳本，看下區別，如下圖所示：

a.腳本區別：

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b.編譯生成文件的區別：

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12.下面開始使用Android Studio創建App工程，并使用以上我們編譯生成的動態庫，編寫一個簡單的jni調用ffmpeg，播放網絡視頻的Demo

13.創建Android工程FFmpegAndroidDemo，然后在main目錄下創建jni文件夾，然后復制上圖中的include文件夾以及libffmpeg.so(或者include文件夾以及6個so文件)到jni目錄下，結構如下圖所示：

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14.工程根目錄的gradle.properties中添加如下代碼：

android.useDeprecatedNdk=true

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14.工程根目錄的local.properties中添加如下代碼：

ndk.dir=/Users/zhangyipeng/Library/Android/sdk/ndk-bundle

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15.創建FFmpegNdk.java文件,?代碼如下：

public class FFmpegNdk {
    static {
//        System.loadLibrary("avcodec-57");
//        System.loadLibrary("avfilter-6");
//        System.loadLibrary("avformat-57");
//        System.loadLibrary("avutil-55");
//        System.loadLibrary("swresample-2");
//        System.loadLibrary("swscale-4");
        System.loadLibrary("ffmpeg");
        System.loadLibrary("myffmpeg");
    }
    public static native String avcodecinfo();
    public static native int playVideo(String url, Object surface);
}

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16.MainActivity.java代碼如下：

public class MainActivity extends AppCompatActivity implements SurfaceHolder.Callback {

    private SurfaceView mSurfaceView;
    private SurfaceHolder mSurfaceHolder;
    public static final String url2 = "http://58.135.196.138:8090/live/db3bd108e3364bf3888ccaf8377af077/index.m3u8";
    public static final String url = "http://tx2.a.yximgs.com/upic/2017/06/06/12/BMjAxNzA2MDYxMjA3MDJfOTg5MDkwODRfMjMzMzY5NjI3OV8xXzM=_hd.mp4?tag=1-1496888787-h-0-2gpzxdvetp-f9da4113e6f3de74";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);


        final TextView tv = (TextView) findViewById(R.id.tv);
        SurfaceView mSurfaceView = (SurfaceView) findViewById(R.id.surface_view);
        tv.setMovementMethod(ScrollingMovementMethod.getInstance());
        findViewById(R.id.button).setOnClickListener(new View.OnClickListener() {
            @RequiresApi(api = Build.VERSION_CODES.JELLY_BEAN)
            @Override
            public void onClick(View v) {
                tv.setText(FFmpegNdk.avcodecinfo());
                startActivity(new Intent(MainActivity.this,VideoActivity.class));
            }
        });

        mSurfaceHolder = mSurfaceView.getHolder();
        mSurfaceHolder.addCallback(this);

    }

    @Override
    public void surfaceCreated(SurfaceHolder holder) {
        new Thread(new Runnable() {
            @Override
            public void run() {
                FFmpegNdk.playVideo(url,mSurfaceHolder.getSurface());
            }
        }).start();
    }

    @Override
    public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {

    }

    @Override
    public void surfaceDestroyed(SurfaceHolder holder) {

    }
}

17.使用javah命令生成.h頭文件，在FFmpegAndroidDemo/app/src/main/java目錄下使用如下命令，在jni目錄下生成com_zyp_ffmpegandroiddemo_FFmpegNdk.h文件

javah -d ../jni com.zyp.ffmpegandroiddemo.FFmpegNdk

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18.jni目錄下創建ffmpeg_ndk.c文件,代碼如下所示：

/* DO NOT EDIT THIS FILE - it is machine generated */
#include <jni.h>
#include <stdio.h>
#include "include/libavcodec/avcodec.h"
#include "include/libavformat/avformat.h"
#include "include/libavfilter/avfilter.h"
//#include "com_zyp_ffmpegandroiddemo_FFmpegNdk.h"
#include <android/native_window.h>
#include <android/native_window_jni.h>

#include <android/log.h>
#include "util.h"
#define TAG "ffmpeg_android_tag"
#define LOGD(...) __android_log_print(ANDROID_LOG_DEBUG,TAG ,__VA_ARGS__) // 定義LOGD類型
#define LOGI(...) __android_log_print(ANDROID_LOG_INFO,TAG ,__VA_ARGS__) // 定義LOGI類型
#define LOGW(...) __android_log_print(ANDROID_LOG_WARN,TAG ,__VA_ARGS__) // 定義LOGW類型
#define LOGE(...) __android_log_print(ANDROID_LOG_ERROR,TAG ,__VA_ARGS__) // 定義LOGE類型
#define LOGF(...) __android_log_print(ANDROID_LOG_FATAL,TAG ,__VA_ARGS__) // 定義LOGF類型
/* Header for class com_zyp_ffmpegandroiddemo_FFmpegNdk */

#ifndef _Included_com_zyp_ffmpegandroiddemo_FFmpegNdk
#define _Included_com_zyp_ffmpegandroiddemo_FFmpegNdk
#ifdef __cplusplus
extern "C" {
#endif

/*
 * Class:     com_zyp_ffmpegandroiddemo_FFmpegNdk
 * Method:    avcodecinfo
 * Signature: ()V
 */
JNIEXPORT jstring JNICALL Java_com_zyp_ffmpegandroiddemo_FFmpegNdk_avcodecinfo(JNIEnv *env, jobject obj) {
    char info[40000] = {0};
    av_register_all();
    AVCodec *c_temp = av_codec_next(NULL);
    while (c_temp != NULL) {
        if (c_temp->decode != NULL) {
            sprintf(info, "%s[Dec]", info);
        } else {
            sprintf(info, "%s[Enc]", info);
        }

        switch (c_temp->type) {
            case AVMEDIA_TYPE_VIDEO:
                sprintf(info, "%s[Video]", info);
                break;
            case AVMEDIA_TYPE_AUDIO:
                sprintf(info, "%s[Audio]", info);
                break;
            default:
                sprintf(info, "%s[Other]", info);
                break;
        }
        sprintf(info, "%s[%10s]\n", info, c_temp->name);
        c_temp = c_temp->next;
    }
    return (*env)->NewStringUTF(env, info);
}

/*
 * Class:     com_zyp_ffmpegandroiddemo_FFmpegNdk
 * Method:    playVideo
 * Signature: (Ljava/lang/String;Ljava/lang/Object;)I
 */
JNIEXPORT jint JNICALL Java_com_zyp_ffmpegandroiddemo_FFmpegNdk_playVideo(JNIEnv *env, jclass clazz, jstring url, jobject surface) {
    LOGD("start playvideo... url : %s",url);
    char * url2= jstringTostring(env,url);
    LOGD("start playvideo... url : %s",url2);
    av_register_all();
    AVFormatContext * pFormatCtx = avformat_alloc_context();
    // Open video file
    if(avformat_open_input(&pFormatCtx, url2, NULL, NULL)!=0) {
        LOGE("Couldn't open file:%s\n", url2);
        return -1; // Couldn't open file
    }
    // Retrieve stream information
    if(avformat_find_stream_info(pFormatCtx, NULL)<0) {
        LOGE("Couldn't find stream information.");
        return -1;
    }
    // Find the first video stream
    int videoStream = -1, i;
    for (i = 0; i < pFormatCtx->nb_streams; i++) {
        if (pFormatCtx->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO
           && videoStream < 0) {
            videoStream = i;
        }
    }
    if(videoStream==-1) {
        LOGE("Didn't find a video stream.");
        return -1; // Didn't find a video stream
    }
    // Get a pointer to the codec context for the video stream
    AVCodecContext  * pCodecCtx = pFormatCtx->streams[videoStream]->codec;
    // Find the decoder for the video stream
    AVCodec * pCodec = avcodec_find_decoder(pCodecCtx->codec_id);
    if(pCodec==NULL) {
        LOGE("Codec not found.");
        return -1; // Codec not found
    }
    if(avcodec_open2(pCodecCtx, pCodec, NULL) < 0) {
        LOGE("Could not open codec.");
        return -1; // Could not open codec
    }
    // 獲取native window
    ANativeWindow* nativeWindow = ANativeWindow_fromSurface(env, surface);
    // 獲取視頻寬高
    int videoWidth = pCodecCtx->width;
    int videoHeight = pCodecCtx->height;
    // 設置native window的buffer大小,可自動拉伸
    ANativeWindow_setBuffersGeometry(nativeWindow,  videoWidth, videoHeight, WINDOW_FORMAT_RGBA_8888);
    ANativeWindow_Buffer windowBuffer;
    if(avcodec_open2(pCodecCtx, pCodec, NULL)<0) {
        LOGE("Could not open codec.");
        return -1; // Could not open codec
    }
    // Allocate video frame
    AVFrame * pFrame = av_frame_alloc();
    // 用于渲染
    AVFrame * pFrameRGBA = av_frame_alloc();
    if(pFrameRGBA == NULL || pFrame == NULL) {
        LOGE("Could not allocate video frame.");
        return -1;
    }
    // Determine required buffer size and allocate buffer
    // buffer中數據就是用于渲染的,且格式為RGBA
    int numBytes=av_image_get_buffer_size(AV_PIX_FMT_RGBA, pCodecCtx->width, pCodecCtx->height, 1);
    uint8_t * buffer=(uint8_t *)av_malloc(numBytes*sizeof(uint8_t));
    av_image_fill_arrays(pFrameRGBA->data, pFrameRGBA->linesize, buffer, AV_PIX_FMT_RGBA,
                         pCodecCtx->width, pCodecCtx->height, 1);
    // 由于解碼出來的幀格式不是RGBA的,在渲染之前需要進行格式轉換
    struct SwsContext *sws_ctx = sws_getContext(pCodecCtx->width,
                             pCodecCtx->height,
                             pCodecCtx->pix_fmt,
                             pCodecCtx->width,
                             pCodecCtx->height,
                             AV_PIX_FMT_RGBA,
//                             SWS_BILINEAR,
                             NULL,
                             NULL,
                             NULL);
    int frameFinished;
    AVPacket packet;
    while(av_read_frame(pFormatCtx, &packet)>=0) {
        // Is this a packet from the video stream?
        if(packet.stream_index==videoStream) {
            // Decode video frame
            avcodec_decode_video2(pCodecCtx, pFrame, &frameFinished, &packet);
            // 并不是decode一次就可解碼出一幀
            if (frameFinished) {
                // lock native window buffer
                ANativeWindow_lock(nativeWindow, &windowBuffer, 0);
                // 格式轉換
                sws_scale(sws_ctx, (uint8_t const * const *)pFrame->data,
                          pFrame->linesize, 0, pCodecCtx->height,
                          pFrameRGBA->data, pFrameRGBA->linesize);
                // 獲取stride
                uint8_t * dst = windowBuffer.bits;
                int dstStride = windowBuffer.stride * 4;
                uint8_t * src = (uint8_t*) (pFrameRGBA->data[0]);
                int srcStride = pFrameRGBA->linesize[0];
                // 由于window的stride和幀的stride不同,因此需要逐行復制
                int h;
                for (h = 0; h < videoHeight; h++) {
                    memcpy(dst + h * dstStride, src + h * srcStride, srcStride);
                }
                ANativeWindow_unlockAndPost(nativeWindow);
            }
        }
        av_packet_unref(&packet);
    }
    av_free(buffer);
    av_free(pFrameRGBA);
    // Free the YUV frame
    av_free(pFrame);
    // Close the codecs
    avcodec_close(pCodecCtx);
    // Close the video file
    avformat_close_input(&pFormatCtx);
    return 0;
}
#ifdef __cplusplus
}
#endif
#endif

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19.創建Android.mk文件，代碼如下圖所示：

# $java目錄下執行 javah -d ../jni com.zyp.ffmpegandroiddemo.FFmpegNdk

LOCAL_PATH := $(call my-dir)

#FFFmpeg libray
#include $(CLEAR_VARS)
#LOCAL_MODULE := avcodec
#LOCAL_SRC_FILES := libavcodec-57.so
#include $(PREBUILT_SHARED_LIBRARY)
#
#include $(CLEAR_VARS)
#LOCAL_MODULE := avfilter
#LOCAL_SRC_FILES := libavfilter-6.so
#include $(PREBUILT_SHARED_LIBRARY)
#
#include $(CLEAR_VARS)
#LOCAL_MODULE := avformat
#LOCAL_SRC_FILES := libavformat-57.so
#include $(PREBUILT_SHARED_LIBRARY)
#
#include $(CLEAR_VARS)
#LOCAL_MODULE := avutil
#LOCAL_SRC_FILES := libavutil-55.so
#include $(PREBUILT_SHARED_LIBRARY)
#
#include $(CLEAR_VARS)
#LOCAL_MODULE := swresample
#LOCAL_SRC_FILES := libswresample-2.so
#include $(PREBUILT_SHARED_LIBRARY)
#
#include $(CLEAR_VARS)
#LOCAL_MODULE := swscale
#LOCAL_SRC_FILES := libswscale-4.so
#include $(PREBUILT_SHARED_LIBRARY)

include $(CLEAR_VARS)
LOCAL_MODULE := libffmpeg
LOCAL_SRC_FILES := libffmpeg.so
include $(PREBUILT_SHARED_LIBRARY)

#Program
include $(CLEAR_VARS)
LOCAL_MODULE := myffmpeg
LOCAL_SRC_FILES := ffmpeg_ndk.c
LOCAL_C_INCLUDES += $(LOCAL_PATH)/include/
LOCAL_LDLIBS := -llog -lz -landroid
#LOCAL_SHARED_LIBRARIES := avcodec avdevice avfilter avformat avutil postproc swresample swscale
LOCAL_SHARED_LIBRARIES := ffmpeg
include $(BUILD_SHARED_LIBRARY)

19.創建Application.mk文件,代碼如下圖所示：

APP_MODULES := myffmpeg
APP_ABI := armeabi armeabi-v7a
APP_PLATFORM := android-10

20.在jni目錄下執行ndk-build,會在jni/lib目錄下生成so動態庫

Paste_Image.png

21.打開app目錄下的build.gradle文件，加入如下腳本：

android{
  ...
  sourceSets.main {
        jni.srcDirs = []
        res.srcDirs = ['src/main/res']
        jniLibs.srcDirs = ['src/main/libs']
    }
  ...
}

Paste_Image.png

22.現在一切配置ok，代碼和腳本也寫完了，可以點擊run，運行app了，效果如下圖：

視頻地址是抓的快手上的^_

Paste_Image.png

23.這篇文章主要是根據以下兩篇技術文章，然后與自己的實踐綜合起來寫的，感謝。
手把手圖文并茂教你用Android Studio編譯FFmpeg庫并移植
Android最簡單的基于FFmpeg的例子(三)---編譯FFmpeg成一個SO庫

24.Demo下載地址