前言

依葫芦画瓢 全程30分钟从零完成ffmpeg编译，主打的就是一个极客

编译环境

OS 要求：Ubuntu 20.04 LTS

VMware新建虚拟机

NDK 要求：android-ndk-r20b

FFmpeg 功能模块：

libavformat:多媒体文件或协议的封装和解封装库，如 Mp4、Flv 等文件封装格式，RTMP、RTSP 等网络协议封装格式；
libavcodec：音视频编解码库；
libavfilter：音视频、字幕滤镜库；
libswscale：图像格式转换库；
libswresample：音频重采样库；
libavutil：工具库；

ffmpeg下载源码

1. 下载 ffmpeg-4.2.2
   wget https://ffmpeg.org/releases/ffmpeg-4.2.2.tar.bz2
2. 解压 FFmpeg
   tar -jxvf ffmpeg-4.2.2.tar.bz2

apt-get install build-essential
apt-get build-dep ffmpeg

下载源

/etc/apt/sources.list
阿里云镜像源#
deb http://mirrors.aliyun.com/ubuntu/ focal main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ focal main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ focal-security main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ focal-security main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ focal-updates main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ focal-updates main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ focal-proposed main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ focal-proposed main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ focal-backports main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ focal-backports main restricted universe multiverse

编辑文件完成后，执行如下命令进行更新缓存
sudo apt update 
sudo apt upgrade

3. 配置项目

./configure --disable-x86asm

NDK 下载

https://developer.android.com/ndk/downloads/older_releases?hl=zh-cn#ndk-20b-downloads

wget https://dl.google.com/android/repository/android-ndk-r20b-linux-x86_64.zip?hl=zh-cn

tar -jxvf android-ndk-r20b-linux-x86_64.tar.bz2

加入环境变量

sudo gedit ~/.bashrc

//文件底部
export   NDK=/home/maqi/Desktop/android-ndk-r20b
export   PATH=${PATH}:$NDK

source  ~/.bashrc

arm64-v8a

//授权
sudo chmod +x build_android_arm64-v8a_clang.sh
//编辑
sudo gedit build_android_arm64-v8a_clang.sh 	

#!/bin/bash

export NDK=/home/maqi/Desktop/android-ndk-r20b #这里配置先你的 NDK 路径
TOOLCHAIN=$NDK/toolchains/llvm/prebuilt/linux-x86_64


function build_android
{

./configure \
--prefix=$PREFIX \
--enable-neon  \
--enable-hwaccels  \
--enable-gpl   \
--disable-postproc \
--disable-debug \
--enable-small \
--enable-jni \
--enable-mediacodec \
--enable-decoder=h264_mediacodec \
--enable-static \
--enable-shared \
--disable-doc \
--enable-ffmpeg \
--disable-ffplay \
--disable-ffprobe \
--disable-avdevice \
--disable-doc \
--disable-symver \
--cross-prefix=$CROSS_PREFIX \
--target-os=android \
--arch=$ARCH \
--cpu=$CPU \
--cc=$CC \
--cxx=$CXX \
--enable-cross-compile \
--sysroot=$SYSROOT \
--extra-cflags="-Os -fpic $OPTIMIZE_CFLAGS" \
--extra-ldflags="$ADDI_LDFLAGS"

make clean
make -j16
make install

echo "============================ build android arm64-v8a success =========================="

}

#arm64-v8a
ARCH=arm64
CPU=armv8-a
API=21
CC=$TOOLCHAIN/bin/aarch64-linux-android$API-clang
CXX=$TOOLCHAIN/bin/aarch64-linux-android$API-clang++
SYSROOT=$NDK/toolchains/llvm/prebuilt/linux-x86_64/sysroot
CROSS_PREFIX=$TOOLCHAIN/bin/aarch64-linux-android-
PREFIX=$(pwd)/android/$CPU
OPTIMIZE_CFLAGS="-march=$CPU"

build_android

//运行
./build_android_arm64-v8a_clang.sh

armv7-a

sudo touch build_android_armv7-a_clang.sh

//授权
sudo chmod +x build_android_armv7-a_clang.sh
//编辑
sudo gedit build_android_armv7-a_clang.sh 	

#!/bin/bash

export NDK=/home/maqi/Desktop/android-ndk-r20b #这里配置先你的 NDK 路径
TOOLCHAIN=$NDK/toolchains/llvm/prebuilt/linux-x86_64


function build_android
{

./configure \
--prefix=$PREFIX \
--enable-neon  \
--enable-hwaccels  \
--enable-gpl   \
--disable-postproc \
--disable-debug \
--enable-small \
--enable-jni \
--enable-mediacodec \
--enable-decoder=h264_mediacodec \
--enable-static \
--enable-shared \
--disable-doc \
--enable-ffmpeg \
--disable-ffplay \
--disable-ffprobe \
--disable-avdevice \
--disable-doc \
--disable-symver \
--cross-prefix=$CROSS_PREFIX \
--target-os=android \
--arch=$ARCH \
--cpu=$CPU \
--cc=$CC \
--cxx=$CXX \
--enable-cross-compile \
--sysroot=$SYSROOT \
--extra-cflags="-Os -fpic $OPTIMIZE_CFLAGS" \
--extra-ldflags="$ADDI_LDFLAGS"

make clean
make -j16
make install

echo "============================ build android armv7-a success =========================="

}

#armv7-a
ARCH=arm
CPU=armv7-a
API=21
CC=$TOOLCHAIN/bin/armv7a-linux-androideabi$API-clang
CXX=$TOOLCHAIN/bin/armv7a-linux-androideabi$API-clang++
SYSROOT=$NDK/toolchains/llvm/prebuilt/linux-x86_64/sysroot
CROSS_PREFIX=$TOOLCHAIN/bin/arm-linux-androideabi-
PREFIX=$(pwd)/android/$CPU
OPTIMIZE_CFLAGS="-mfloat-abi=softfp -mfpu=vfp -marm -march=$CPU "

build_android

//运行
./build_android_armv7-a_clang.sh

文件夹授权

sudo chmod -R 700 android/

基于 [FFmpeg 开发(01)：FFmpeg 编译和集成]
(https://blog.csdn.net/Kennethdroid/article/details/106956601)