手把手编译FFmpeg

news2025/1/20 4:45:20

支持centos8.6、ubuntu20.04

export

建议开始之前，弄一台干净的机子，或者系统恢复到出厂设置，否则容易出问题

然后设置动态库默认加载目录（注意/usr/local/lib不是系统默认的路径，/lib和/usr/lib才是）

export LD_LIBRARY_PATH=/usr/local/lib:$LD_LIBRARY_PATH
export PKG_CONFIG_PATH=/usr/local/lib/pkgconfig:$PKG_CONFIG_PATH
# ....其他自定义地址, export LD_LIBRARY_PATH=<path>:$LD_LIBRARY_PATH

为什么修改LD_LIBRARY_PATH呢？因为运行时动态库的搜索路径的先后顺序是：

编译目标代码时指定的动态库搜索路径，优先级最高，需要用户直接在CMakeList.txt里指定，例如：link_directories(${CMAKE_CURRENT_SOURCE_DIR}/lib)
环境变量LD_LIBRARY_PATH指定的动态库搜索路径，通过echo $LD_LIBRARY_PATH来查看
配置文件/etc/ld.so.conf中指定的动态库搜索路径，通过cat /etc/ld.so.conf来查看
系统默认动态库搜索路径/lib
系统默认动态库搜索路径/usr/lib

这个顺序是compile gcc时写在程序内的，通常软件源代码自带的动态库不会太多，而我们的/lib和/usr/lib只有root权限才可以修改，而且配置文件/etc/ld.so.conf也是root的事情，我们只好对LD_LIBRARY_PATH进行操作。

sudo vi /etc/profile

添加几行内容（和刚才的export一摸一样）

export LD_LIBRARY_PATH=/usr/local/lib:$LD_LIBRARY_PATH

export PKG_CONFIG_PATH=/usr/local/lib/pkgconfig:$PKG_CONFIG_PATH

然后执行source使之生效

source /etc/profile

cmake/make/gcc/g++/gdb

首先进入管理者模式

sudo su
#centos
yum update
yum install git unzip zip
#ubuntu
apt update
apt install git unzip zip

准备好Linux设备，先安装cmake v3.20.2

cd /usr/local
wget https://cmake.org/files/v3.20/cmake-3.20.2-linux-x86_64.tar.gz
tar zxvf cmake-3.20.2-linux-x86_64.tar.gz
mv cmake-3.20.2-linux-x86_64 /opt/cmake-3.20.2
ln -sf /opt/cmake-3.20.2/bin/* /usr/bin/
rm cmake-3.20.2-linux-x86_64.tar.gz

通过cmake命令来验证

然后安装编译器和构建工具

make、gcc、g++、gdb

#centos
yum install make gcc g++ gdb
#ubuntu
apt install make gcc g++ gdb

验证gdb版本

openssl

安装openssl，如果是ubuntu先要删除系统自带的版本

apt remove openssl

然后统一安装openssl

cd /usr/local
wget https://www.openssl.org/source/openssl-1.1.1i.tar.gz --no-check-certificate
tar zxvf openssl-1.1.1i.tar.gz
mv openssl-1.1.1i openssl
cd openssl
./config shared
make
make install

测试openssl版本信息

openssl version

如果出现以下错误，就重启下机子

设置环境变量，否则cmake的find_package找不到它，同时也写进/etc/profile中去

参考：cmake .. -DOPENSSL_ROOT_DIR=/usr/local/openssl -DOPENSSL_INCLUDE_DIR=/usr/local/include -DOPENSSL_CRYPTO_LIBRARY=/usr/local/lib/libcrypto.so -DOPENSSL_SSL_LIBRARY=/usr/local/lib/libssl.so

export OPENSSL_ROOT_DIR=/usr/local/openssl
export OPENSSL_INCLUDE_DIR=/usr/local/include/openssl
export OPENSSL_CRYPTO_LIBRARY=/usr/local/lib/libcrypto.so
export OPENSSL_SSL_LIBRARY=/usr/local/lib/libssl.so

ffmpeg

mkdir /usr/local/DOWNLOAD

#ubuntu
sudo apt-get install libx11-dev
sudo apt-get install xorg-dev
#解决ffplay播放音频报错:Could not initialize SDL - Audio target 'pulse' not available,以及No such audio device问题
sudo apt-get install libpulse-dev
#以下这两个只安装libasound2也是可以的，如果不行就两个都安装
sudo apt-get install libasound2
sudo apt-get install libasound2-dev

yasm

cd /usr/local/DOWNLOAD
wget http://www.tortall.net/projects/yasm/releases/yasm-1.3.0.tar.gz --no-check-certificate
tar zxvf yasm-1.3.0.tar.gz
cd yasm-1.3.0
sudo ./configure
sudo make
sudo make install

fdk-aac

cd /usr/local/DOWNLOAD
wget https://downloads.sourceforge.net/opencore-amr/fdk-aac-2.0.1.tar.gz --no-check-certificate
tar zxvf fdk-aac-2.0.1.tar.gz
cd fdk-aac-2.0.1
./configure --disable-static
make
make install

nasm

cd /usr/local/DOWNLOAD
wget https://www.nasm.us/pub/nasm/releasebuilds/2.15/nasm-2.15.tar.gz --no-check-certificate
tar -vxf nasm-2.15.tar.gz
cd nasm-2.15
./configure
make
make install

sdl2

cd /usr/local/DOWNLOAD
wget http://libsdl.org/release/SDL2-2.0.14.tar.gz --no-check-certificate
tar zxvf SDL2-2.0.14.tar.gz
cd SDL2-2.0.14
./configure
make
make install

curl

cd /usr/local/DOWNLOAD
wget https://curl.haxx.se/download/curl-7.74.0.tar.gz --no-check-certificate
tar zxvf curl-7.74.0.tar.gz
cd curl-7.74.0
./configure --without-nss --with-ssl
make
make install

vpx

cd /usr/local/DOWNLOAD
wget https://github.com/webmproject/libvpx/archive/v1.10.0/libvpx-1.10.0.tar.gz
unzip libvpx-v1.10.0.zip
cd libvpx-1.10.0
./configure --enable-pic --enable-static  --enable-shared --as=yasm --target=generic-gnu
make
make install

opus

cd /usr/local/DOWNLOAD
wget https://archive.mozilla.org/pub/opus/opus-1.3.tar.gz
tar xzvf opus-1.3.tar.gz
cd opus-1.3
./configure --enable-static --enable-shared
make
make install

x264

cd /usr/local/DOWNLOAD
git clone https://code.videolan.org/videolan/x264.git
cd x264
./configure --enable-static --enable-shared --disable-opencl --disable-asm
make
make install

x265

cd /usr/local/DOWNLOAD
wget http://ftp.videolan.org/pub/videolan/x265/x265_3.2.tar.gz --no-check-certificate
tar xzvf x265_3.2.tar.gz
cd x265_3.2/build/linux/
sh make-Makefiles.bash
// 按'c'再按'e'再按'g'键保存退出
make
make install

ffmpeg

#查看链接依赖顺序
/sbin/ldconfig -v
 
cd /usr/local/DOWNLOAD
wget http://ffmpeg.org/releases/ffmpeg-4.3.2.tar.xz --no-check-certificate
tar -xvf ffmpeg-4.3.2.tar.xz
cd ffmpeg-4.3.2

./configure --prefix=/usr/local \
  --enable-static \
  --enable-shared \
  --enable-gpl \
  --enable-libx264 \
  --enable-libx265 \
  --enable-libopus \
  --enable-libvpx \
  --enable-sdl2 \
  --enable-zlib \
  --enable-libfdk-aac \
  --enable-openssl \
  --enable-nonfree \
  --extra-cflags=-Wno-implicit-function-declaration
   
make && make install

到此，就基本ok了，输入ffmpeg命令查看一下吧

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