一、概述

官网链接：

CompilationGuide – FFmpeghttps://trac.ffmpeg.org/wiki/CompilationGuide在官网上介绍了四种windows上的编译方法，目前仅试了第一种

CompilationGuide/MinGW – FFmpeg https://trac.ffmpeg.org/wiki/CompilationGuide/MinGW

二、具体操作步骤

1、预置条件：

? ? ?操作系统：win10 64bit
? ? ?vs：vs2019

2、从官网上下载安装x86_64版本安装程序。

MSYS2Software Distribution and Building Platform for Windowshttps://www.msys2.org/? ? ?安装完成之后，先把安装目录下的msys2_shell.cmd中注释掉的rem set MSYS2_PATH_TYPE=inherit改成set MSYS2_PATH_TYPE=inherit。这是为了将vs的环境继承给MSYS2。

3、按照官网指导，安装gcc、pkg-config等软件包。

pacman -Syu
pacman -Su
pacman -S --needed base-devel mingw-w64-x86_64-toolchain

? ? ??

三、注意事项

1、检查编译环境，是否是如下路径

# which cl link yasm cpp
/c/Program Files (x86)/Microsoft Visual Studio/2019/Professional/VC/Tools/MSVC/14.29.30133/bin/HostX64/x64/cl
/c/Program Files (x86)/Microsoft Visual Studio/2019/Professional/VC/Tools/MSVC/14.29.30133/bin/HostX64/x64/link
/usr/bin/yasm
/mingw64/bin/cpp

?注意：重命名msys64/usr/bin/link.exe 为msys64/usr/bin/link.bak, 避免和MSVC 的link.exe冲突。

2、使用x64 Native Tools Command Prompt for VS 2019打开msys2界面。命令行：

msys2_shell.cmd -mingw64

?3、配置include和lib路径。

./configure --toolchain=msvc --target-os=win64 \
    --arch=x86_64 \
    --enable-shared \
    --enable-small \
    --enable-version3 \
    --enable-gpl \
    --enable-nonfree \
    --disable-stripping \
    --disable-encoders \
    --disable-decoders \
    --enable-decoder=h264 \
    --enable-encoder=mjpeg \
    --enable-encoder=mpeg4 \
    --prefix=./build \
    --extra-cflags="-I/home/crystl/build/include -I/home/crystl/build/include/10.0.20348.0/ucrt\
                             -I/home/crystl/build/include/10.0.20348.0/um  -I/home/crystl/build/include/10.0.20348.0/shared\
                            -I/home/crystl/build/include/vs_include" \
    --extra-ldflags="-LIBPATH:/home/crystl/build/lib \
                               -LIBPATH:/home/crystl/build/lib/vs_x64 \
                               -LIBPATH:/home/crystl/build/lib/10.0.20348.0/ucrt/x64 \
                               -LIBPATH:/home/crystl/build/lib/10.0.20348.0/um/x64 \
                               -LIBPATH:/home/crystl/build/lib/10.0.20348.0/ucrt_enclave/x64"

这里的include文件是从如下文件夹里面拷贝出来的

C:\Program Files (x86)\Windows Kits\10\Include\10.0.20348.0

C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.29.30133\include

lib库是从如下文件夹里面拷贝出来的

C:\Program Files (x86)\Windows Kits\10\Lib\10.0.20348.0

C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.29.30133\lib\x64