本文所在系统环境ubuntu18.04

交叉编译工具链gcc-linaro-5.5.0-2017.10-x86_64_aarch64-linux-gnu

ffmpeg版本5.0.1

1.下载源码

ffmpeg官网：https://ffmpeg.org/download.html#build-linux

下载完解压

2.安装依赖

sudo apt-get install libmp3lame-dev libx264-dev libxvidcore-dev

sudo apt-get update && sudo apt-get -y install \
  autoconf \
  automake \
  build-essential \
  cmake \
  git-core \
  libass-dev \
  libfreetype6-dev \
  libgnutls28-dev \
  libmp3lame-dev \
  libsdl2-dev \
  libtool \
  libva-dev \
  libvdpau-dev \
  libvorbis-dev \
  libxcb1-dev \
  libxcb-shm0-dev \
  libxcb-xfixes0-dev \
  meson \
  ninja-build \
  pkg-config \
  texinfo \
  wget \
  yasm \
  zlib1g-dev \
  libunistring-dev

3.生成

进入ffmpeg源码文件中打开终端，记得修改最终生成路径--prefix，交叉编译工具链路径--cross-prefix，以及aarch64-linux-gnu-gcc与aarch64-linux-gnu-g++所在路径--cc、--cxx

chmod +x configure
./configure --enable-cross-compile --target-os=linux --arch=arm64 \
--cross-prefix=/home/fy/gcc-linaro-5.5.0-2017.10-x86_64_aarch64-linux-gnu/bin/aarch64-linux-gnu- \
--cc=/home/fy/gcc-linaro-5.5.0-2017.10-x86_64_aarch64-linux-gnu/bin/aarch64-linux-gnu-gcc \
--cxx=/home/fy/gcc-linaro-5.5.0-2017.10-x86_64_aarch64-linux-gnu/bin/aarch64-linux-gnu-g++ \
--prefix=/home/fy/LIBS/ffmpeg5.0.1_linux_arm64 \
--disable-asm  --enable-parsers --disable-decoders --enable-decoder=h264 --enable-decoder=aac --disable-debug --enable-ffmpeg --enable-shared --disable-static --disable-stripping --disable-doc

4.编译

需要sudo自己加

make -j$(nproc)

如果出现xxx权限不够，使用chmod加执行权限

sudo chmod -R 777 ./

5.安装

需要sudo自己加

 make install

 6.交叉编译带libx264的ffmpeg库（可选，结合上面的步骤看）

下载libx264，x264, the best H.264/AVC encoder - VideoLAN

 在ubuntu解压，编译方法为

./configure --cross-prefix=/opt/gcc-linaro-7.5.0-2019.12-x86_64_aarch64-linux-gnu/bin/aarch64-linux-gnu- \
--host=aarch64-linux \
--prefix=/home/fy/x264lib \
--enable-shared --disable-asm 
make -j$(nproc)
make install

注意修改自己交叉编译链路径--cross-prefix，目标路径--prefix，--host

再编译ffmpeg的选项如下

./configure --enable-cross-compile --target-os=linux --arch=aarch64 \
--cross-prefix=/opt/gcc-linaro-7.5.0-2019.12-x86_64_aarch64-linux-gnu/bin/aarch64-linux-gnu- \
--cc=/opt/gcc-linaro-7.5.0-2019.12-x86_64_aarch64-linux-gnu/bin/aarch64-linux-gnu-gcc \
--cxx=/opt/gcc-linaro-7.5.0-2019.12-x86_64_aarch64-linux-gnu/bin/aarch64-linux-gnu-g++ \
--prefix=/home/fy/ffmpeg5.0.1_build \
--disable-asm  --enable-parsers --enable-decoder=h264 --enable-decoder=aac --disable-debug --enable-ffmpeg --enable-shared --disable-static --disable-stripping --disable-doc --enable-gpl --enable-swresample --enable-libx264 \
--extra-libs=-ldl \
--extra-cflags="-I/home/fy/ffmpeg5.0.1/x264lib/include" \
--extra-ldflags="-L/home/fy/ffmpeg5.0.1/x264lib/lib"