编译X264需要至少 VS2013 update 2 以上版本. 本文使用 VS2015.
示例工程：https://github.com/gitgjogh/FFmpeg-gitgjogh/tree/msvc/build_msvc
Build Libav*** Using MSVC Compiler Under MINGW32
Import vcvar Into MSYS (MINGW32)
- Scheme#1: From
Start Menu->vs2015->tools->VS2015 x86 本机工具命令提示startmsys.batbinding withmingw32. (Don‘t usemingw64) - Scheme#2: Add
call "C:/Program Files/Microsoft Visual Studio 14.0/VC/vcvarsall.bat"to the 1st line ofmsys.bat. Then kick offmsys.bat.
Confirm vcvar has been imported:
$ which link nmake
/c/Program Files (x86)/Microsoft Visual Studio 14.0/VC/BIN/link.exe
/c/Program Files (x86)/Microsoft Visual Studio 14.0/VC/BIN/nmake.exe
nmake is the make programe under MSVC. Needed for making zlib. See later.
Fix Collision Between VC-link And MSYS-LINK
VC-linklinks obj/libs files to create exe/dll fileMSYS-LINKcreates a link named FILE2 to an existing FILE1.
It is possible that msys‘s file linker or coreutils‘s linker conflicts with MSVC’s linker. You can find out by runningwhich link to see which link binary you are using. If it is located at /bin/link.exe, mv /bin/link.exe to /bin/msys-link.exe
Yasm
X264
You need at least VS2013 update 2 to compile x264.
Go to an x264 source tree
> $ CC=cl ./configure --prefix=${PATH_TO_build_msvc} --enable-static --disable-gpl --enable-debug --enable-win32thread
> $ make && make install
> $ MSVC=‘/c/Program Files (x86)/Microsoft Visual Studio 14.0/VC/‘
> $ cp libx264.lib ${MSVC}/lib/x264.lib
> $ cp x264.h x264_config.h ${MSVC}/include/
Zlib
$ cd zlib-1.2.8- Edit
win32/Makefile.mscso thatCFLAGSuses-MTinstead of-MD, since this is how FFmpeg is built as well.
> del CFLAGS = -nologo -MD -W3 -O2 -Oy--Zi -Fd"zlib" $(LOC)
> add CFLAGS = -nologo -MT -W3 -O2 -Oy -Zi -Fd"zlib" $(LOC) - Edit
zconf.hand remove its inclusion ofunistd.h. This gets erroneously included when building FFmpeg. $ nmake -f win32/Makefile.msc- Move
zlib.lib,zconf.handzlib.hto somewhere MSVC can see.
> $ MSVC=‘/c/Program Files (x86)/Microsoft Visual Studio 14.0/VC/‘
> $ cp zlib.lib ${MSVC}/VC/lib/
> $ cp zconf.h zlib.h ${MSVC}/include/
reference: http://www.ffmpeg.org/platform.html
Build FFmpeg Libs Using msvc Toolchain
under build_msvc:
> $ madir build && cd build
> $ ../../configure --prefix=`pwd`/.. --toolchain=msvc --disable-shared --enable-static --enable-libx264 --enable-gpl
> $ make --debug | tee make.log
> $ make install
If configuration failed because ‘can‘t find libx264‘:
> $ export PKG_CONFIG_PATH=${PATH_TO_build_msvc}/lib/pkg-config:$PKG_CONFIG_PATH
Create Win32 Console App. Project
Add the following files to the project:
cmdutils.h cmdutils_common_opt.h build/config.h ffmpeg.h
cmdutils.c ffmpeg.c ffmpeg_dxva2.cffmpeg_filter.c ffmpeg_opt.c
Clue: Run grep "^CC" make.log to see what files are compiled.
Add Dependency
- Additional Include Directories:
include;build - Additional Library Directories:
lib - Additional Dependent Libraries:
vfw32.lib;psapi.lib;strmiids.lib;shlwapi.lib;ws2_32.lib;x264.lib;zlib.lib;libavdevice.a;libavfilter.a;libswscale.a;libpostproc.a;libavformat.a;libavcodec.a;libswresample.a;libavutil.a
Clue#1: Under build_msvc, run env PKG_CONFIG_PATH=lib/pkgconfig/ pkg-config --libs libavdevice to see what additional libs need to be added. For example, my result is:
vfw32.lib user32.lib gdi32.lib psapi.lib ole32.lib strmiids.lib uuid.lib oleaut32.lib shlwapi.lib ws2_32.lib x264.lib zlib.lib advapi32.lib shell32.lib -L../lib -lavdevice -lavfilter -lswscale -lpostproc -lavformat -lavcodec -libpath:../lib -lswresample -lavutil
Clue#2: The following lines in the generated ‘Malefile‘ also can be took as reference to decide lib orders
# $(FFLIBS-yes) needs to be in linking order
FFLIBS-$(CONFIG_AVDEVICE) += avdevice
FFLIBS-$(CONFIG_AVFILTER) += avfilter
FFLIBS-$(CONFIG_AVFORMAT) += avformat
FFLIBS-$(CONFIG_AVCODEC) += avcodec
FFLIBS-$(CONFIG_AVRESAMPLE) += avresample
FFLIBS-$(CONFIG_POSTPROC) += postproc
FFLIBS-$(CONFIG_SWRESAMPLE) += swresample
FFLIBS-$(CONFIG_SWSCALE) += swscale
Set Preprocessor
-D_ISOC99_SOURCE -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_WIN32_WINNT=0x0502 -nologo -D_USE_MATH_DEFINES -D_CRT_SECURE_NO_WARNINGS
Clue#1: search ‘CPPFLAGS‘,‘CFLAGS‘,‘CXXFLAGS‘.‘ASFLAGS‘ in ‘config.mak‘ to see how autoconfig deal with ‘inline‘,‘snprintf‘ compatibility by setting ‘--toolchain=msvc‘ option.
Clue#2: search ‘^cl‘ in ‘config.log‘, see that how MSVC compiler ‘cl.exe‘ is called. Here is an example:
"cl -D_ISOC99_SOURCE -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_WIN32_WINNT=0x0502 -nologo -D_USE_MATH_DEFINES -D_CRT_SECURE_NO_WARNINGS -I../include -Z7 -W4 -wd4244 -wd4127 -wd4018 -wd4389 -wd4146 -wd4057 -wd4204 -wd4706 -wd4305 -wd4152 -wd4324 -we4013 -wd4100 -wd4214 -wd4307 -wd4273 -wd4554 -wd4701 -O2 -Oy- -P -Fi./ffconf.wAKKajHY.o ./ffconf.FbkkcFDo.c"
Problems
Fix Collision Between LIBCMT.lib and msvcrtd.lib
1>------ 已启动生成: 项目: build_msvc, 配置: Debug Win32 ------
1>LIBCMT.lib(open.obj) : error LNK2005: __sopen 已经在 MSVCRT.lib(MSVCR120.dll) 中定义
1>LIBCMT.lib(invarg.obj) : error LNK2005: __invoke_watson 已经在 MSVCRT.lib(MSVCR120.dll) 中定义
1>LIBCMT.lib(_file.obj) : error LNK2005: ___iob_func 已经在 MSVCRT.lib(MSVCR120.dll) 中定义
reason: some code link to the static RTL(run time library), while some code link to dynamic RTL solution: set msvcr to /MT in "properties->C/C++->Code generation"
reference: https://msdn.microsoft.com/en-us/library/2kzt1wy3%28v=VS.71%29.aspx
Undefined Reference To ‘avresample_version‘, ‘postproc_version‘
two scheme:
1) goto "cmdutil.c"::"print_all_libs_info()", comment the following two lines:
// PRINT_LIB_INFO(avresample, AVRESAMPLE, flags, level);
// PRINT_LIB_INFO(postproc, POSTPROC, flags, level);
2) configure --enable-avresample
Network Module
which has to link to the WINDOWS SDK, so be careful with how ‘_WIN32_WINNT‘ defined in ‘config.mak‘ or ‘config.log‘, copied it to the VC preprocessors. Reference to the "set preprocessor" section.