mingw编译FFmpeg32位和64位dll

一.安装MSYS2环境

1.点击下载msys2-x86_64-20210419.exe或去官网MSYS2官网下载最新版本。

2.安装msys2到任意路径
3.运行mys2并执行命令pacman -Syu，提示一律输入Y同意，终端自动关闭后重新运行msys2（msys2.exe文件在安装目录下），并再次执行pacman -Syu
4.执行命令安装所需依赖包：

pacman -S make
pacman -S diffutils
pacman -S yasm
pacman -S nasm
pacman -S mingw-w64-x86_64-gcc
pacman -S mingw-w64-i686-gcc
pacman -S mingw-w64-x86_64-gtk3
pacman -S mingw-w64-i686-gtk3
pacman -S git

5.下载pkg-config
下载pkg-config_0.23-2_win64并解压，复制 pkg-config.exe 到安装盘符\msys64\mingw64\bin
下载pkg-config_0.26-1_win32并解压，复制 pkg-config.exe 到安装盘符\msys64\mingw32\bin
6.修改文件后缀使编译出dll正常运行

cd /mingw32/bin/
cp libintl-8.dll intl.dll
cd /mingw32/i686-w64-mingw32/lib/
mv libpthread.dll.a libpthread.dll.a-org && mv libwinpthread.dll.a libwinpthread.dll.a-org
cd /mingw32/lib
mv libbz2.dll.a libbz2.dll.a-org && mv libz.dll.a libz.dll.a-org
mv libiconv.dll.a libiconv.dll.a-org && mv liblzma.dll.a liblzma.dll.a-orgcd /mingw64/bin/
cp libintl-8.dll intl.dll
cd /mingw64/x86_64-w64-mingw32/lib/
mv libpthread.dll.a libpthread.dll.a-org && mv libwinpthread.dll.a libwinpthread.dll.a-org
cd /mingw64/lib
mv libbz2.dll.a libbz2.dll.a-org && mv libz.dll.a libz.dll.a-org
mv libiconv.dll.a libiconv.dll.a-org && mv liblzma.dll.a liblzma.dll.a-org

二.下载源码

1.FFmpeg源码
下载FFmpeg 4.3.1:

cd /home
wget https://github.com/FFmpeg/FFmpeg/archive/n4.3.1.tar.gz
tar -zxvf n4.3.1.tar.gz

2.x264源码下载

wget https://code.videolan.org/videolan/x264/-/archive/master/x264-master.tar.bz2
tar -jxvf /home/x264-master.tar.bz2

3.amf源码下载

wget https://github.com/GPUOpen-LibrariesAndSDKs/AMF/archive/1.4.16.1.tar.gz
tar -zxvf /home/AMF-1.4.16.1.tar.gz
cp -r /home/AMF-1.4.16.1/amf/public/include /usr/local/include/AMF

4.ffnvcodec安装

git clone https://git.videolan.org/git/ffmpeg/nv-codec-headers.git
cd nv-codec-headers
make & make install

三.编译dll

1.编译32位dll
启动mingw32
命令行/msys2_shell.cmd -mingw32或者在根目录中找到mingw32.exe运行

1.1编译x264

cd /home/x264-master/./configure \
--prefix=/mingw32 \
--enable-static \
--host=msys \
--disable-climake clean
make -j6 #6表示编译时占用6核，可更改
make install

编译成功

install -d /mingw64/include /mingw64/lib/pkgconfig
install -m 644 ./x264.h x264_config.h /mingw64/include
install -m 644 x264.pc /mingw64/lib/pkgconfig
install -d /mingw64/lib
install -m 644 libx264.a /mingw64/lib
gcc-ranlib /mingw64/lib/libx264.a

1.2编译FFmpeg
根目录下创建脚本文件build.sh

#!/bin/bash
PKG_CONFIG_PATH="/usr/local/lib/pkgconfig"
PREFIX="./bin-$1"
echo "Install dir: $PREFIX"
./configure \
--prefix=$PREFIX \
--extra-ldsoflags="-static-libgcc" \
--extra-cflags="-I/usr/local/include" \
--extra-ldflags="-L/usr/local/lib" \
--disable-iconv \
--disable-doc \
--disable-debug \
--disable-avdevice \
--disable-indevs \
--disable-outdevs \
--disable-postproc \
--disable-ffplay \
--disable-ffprobe \
--disable-encoders \
--disable-decoders \
--enable-small \
--enable-shared \
--enable-ffmpeg \
--enable-version3 \
--enable-nonfree \
--enable-w32threads \
--enable-avcodec \
--enable-avformat \
--enable-swresample \
--enable-swscale \
--enable-avfilter \
--enable-gpl \
--enable-amf \
--enable-nvenc \
--enable-x86asm \
--enable-libx264 \
--enable-encoder=flv \
--enable-encoder=h264_nvenc \
--enable-encoder=h264_amf \
--enable-encoder=hevc_nvenc \
--enable-encoder=hevc_amf \
--enable-encoder=libx264 \
--enable-encoder=pcm_s16le \
--enable-encoder=pcm_s24le \
--enable-encoder=aac \
--enable-encoder=ac3 \
--enable-encoder=dca \
--enable-encoder=opus \
--enable-encoder=vorbis \
--enable-encoder=srt \
--enable-encoder=ass \
--enable-encoder=subrip \
--enable-encoder=mjpeg \
--enable-encoder=gif \
--enable-decoder=mpeg4 \
--enable-decoder=flv \
--enable-decoder=h264 \
--enable-decoder=hevc \
--enable-decoder=vp9 \
--enable-decoder=h264_cuvid \
--enable-decoder=hevc_cuvid \
--enable-decoder=vp9_cuvid \
--enable-decoder=opus \
--enable-decoder=vorbis \
--enable-decoder=aac \
--enable-decoder=ac3 \
--enable-decoder=eac3 \
--enable-decoder=srt \
--enable-decoder=ass \
--enable-decoder=subrip \
--enable-decoder=pcm_s16le \
--enable-decoder=pcm_s24le \
--enable-decoder=dca \
--enable-decoder=mp3 \
--enable-decoder=flac \
--enable-decoder=ape \
--enable-decoder=mjpegmake clean
make -j6 #CPU核心数
make install

回到32位终端，执行编译命令

#切到FFmpeg根目录
cd /home/FFmpeg-n4.3.1
#编译
./build.sh 32

编译成功将生成

avcodec.lib
avfilter.lib
avformat.lib
avutil.lib
swresample-3.dll
swscale-5.dll
avcodec-58.dll
avfilter-7.dll
avformat-58.dll
avutil-56.dll
ffmpeg.exe
swresample.lib
swscale.lib

2.编译64位dll
启动mingw64，通过命令行/msys2_shell.cmd -mingw64或者mingw64.exe
2.1编译x264

cd /home/x264-master/./configure \
--prefix=/mingw64 \
--enable-static \
--disable-climake clean
make -j6 #改成你的CPU核心数
make install

2.2编译FFmpeg

#切到FFmpeg根目录
cd /home/FFmpeg-n4.3.1#编译
./build.sh 64

编译成功后将在/home/FFmpeg-n4.3.1/bin-64/bin目录下生成我们需要的lib及dll文件