Windows下编译FFmpeg的DLL
编译环境Win 64位+MSYS2
一.安装MSYS2
1.下载msys.exe，https://www.msys2.org/
2.安装msys
3.运行msys并执行命令pacman -Syu，一律输入Y同意，执行结束后会自动关闭，再次打开msys后执行pacman -Syu
4.执行下列命令安装依赖包
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，https://download.gnome.org/binaries/，把win64的exe复制到mingw64\bin下，把win32的exe复制到mingw32\bin下
6.执行下列命令修改相关后缀
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-org cd /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.准备源码
1.FFmpeg
官网下载即可
2.x264
wget https://code.videolan.org/videolan/x264/-/archive/master/x264-master.tar.bz2 tar -jxvf /home/x264-master.tar.bz2 -C /home/x264
可能tar解压失败，直接去文件路径下rar解压也行。
3.amf
wget https://github.com/GPUOpen-LibrariesAndSDKs/AMF/archive/1.4.16.1.tar.gz tar -zxvf /home/AMF-1.4.16.1.tar.gz -C /home cp -r /home/AMF-1.4.16.1/amf/public/include/* /usr/local/include/AMF
如果/usr/local/include/AMF不存在，手动mkdir一个。
4.ffnvcodec
git clone https://git.videolan.org/git/ffmpeg/nv-codec-headers.git cd nv-codec-headers make & make install
三.编译
1.编译32位DLL
打开MSYS2 MinGW 32
编译x264
cd /home/x264-master/ ./configure \ --prefix=/mingw32 \ --enable-static \ --host=msys \ --disable-cli make clean make -j6 #改成你的CPU核心数，6表示编译时占用6核 make install
编译成功后将看到下列打印信息
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
编译FFmpeg
在ffmpeg根目录下建立build.sh,将下面的脚本保存其中
#!/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=mjpeg make clean make -j6 #改成你的CPU核心数 make install
然后返回32位终端,执行命令开始编译
#切到FFmpeg根目录 cd /home/FFmpeg-n4.3.1 #编译 ./build.sh 32
执行config比较慢,如果编译成功,会在/home/FFmpeg/bin-32/bin目录下生成下列文件
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
打开MSYS2 MinGW 64
编译x264
cd /home/x264-master/ ./configure \ --prefix=/mingw64 \ --enable-static \ --disable-cli make clean make -j6 #改成你的CPU核心数 make install
编译FFmpeg
直接使用1.2中的脚本
#切到FFmpeg根目录 cd /home/FFmpeg-n4.3.1 #编译 ./build.sh 64
3.编译中可能出现的错误
No working C compiler found:
请确认编译是否在对应的终端中进行，编译32位必须在MSYS2 MinGW 32-bit启动的终端中进行，编译64位必须在 MSYS2 MinGW 64-bit启动的终端中进行。
ERROR: amf requested but not found:
出现次错误表示未在/usr/local/include/AMF目录下找到AMF头文件.
ERROR: nvenc requested, but not all dependencies are satisfied: ffnvcodec：
确保/usr/local/lib/pkgconfig目录下存在ffnvcodec.pc。
ERROR: libx264 not found:
x264未编译成功，确保/mingw64/lib和/mingw32/lib目录下都能找到libx264.a
