Compile FFmpeg for Windows version, success

　　it's actually really easy. The reason why I spent such a big thing is that I tried to compile on the WIN7 virtual machine, so there are various inexplicable errors.

Reference: https://www.jianshu.com/p/5f175dec9109 .

• Environmental preparation

WIN10，VS2015。

• Download FFmpegInterop

https://github.com/microsoft/FFmpegInterop

• Download ffmpeg

Download, decompress, rename ffmpeg, and place it under FFmpegInterop.

• Download and install MSYS2

https://www.msys2.org/

Download x86_64; install in c: \ msys64

• Configuration

c:\msys64\usr\bin目录下，把link.exe改名为link.bak，这样可以调用VS的link。

Edit C: \ msys64 \ msys2_shell.cmd:

rem set MSYS2_PATH_TYPE=inherit
改成
    set MSYS2_PATH_TYPE=inherit

Edit C: \ msys64 \ home \ XXXX \ .bashrc

export PATH=/C/'Program Files (x86)'/'Microsoft Visual Studio 14.0'/VC/bin/amd64:${PATH}

• Start MSYS2

set MSYS2_BIN="C:\msys64\usr\bin\bash.exe"

cd  c:\msys64

msys2_shell.cmd -mingw64

Right click, options, text, Character set changed to UTF-8.

• MSYS2 installation software

For reference, the MinGW-w64 method is recommended.

pacman -S mingw-w64-x86_64-toolchain
pacman -S nasm

# pacman -S make gcc diffutils pkg-config

• Check compilation commands

$ which cl
/C/Program Files (x86)/Microsoft Visual Studio 14.0/VC/bin/amd64/cl

$ which link
/C/Program Files (x86)/Microsoft Visual Studio 14.0/VC/bin/amd64/link

$ which yasm
/usr/bin/yasm

$ which cpp
/mingw64/bin/cpp

• Compile x264

Download, unzip, and compile.

./configure \
    --prefix=../lib-ffmpeg \
    --host=x86_64-w64-mingw32 \
    --enable-shared  --extra-ldflags=-Wl,--output-def=libx264.def

make

make install

Convert to dll

#若要生成64位lib文件则输入如下命令：
lib /machine:X64  /def:libx264.def

#若要生成32位lib文件则输入如下命令：
lib /machine:i386 /def:libx264.def

• configure

Modify FFmpegConfig.sh

--enable-gpl \
--enable-nonfree \
--enable-libx264 \
--extra-cflags="-I${BUILD_LIBS}/include" \
--extra-ldflags="-LIBPATH:${BUILD_LIBS}/lib"

carried out:

./FFmpegConfig.sh Win10 x64

Said to open the newly generated config.h file and convert it to UTF-8 format. This avoids many warnings.

• make

./BuildFFmpeg.bat win10 x64

• Check 32-bit or 64-bit:

查看32位还是64位：
dumpbin /headers libx264.dll

查看符号清单（导出函数）
dumpbin /exports libx264.dll > libx264-exports.txt