Debug FFmpeg in VC2015

Compiling X264 requires at least VS2013 Update 2 or later. This article uses VS2015.

Example Project: Https://github.com/gitgjogh/FFmpeg-gitgjogh/tree/msvc/build_msvc

Build libav*** Using MSVC Compiler under Mingw32import vcvarInto MSYS (MINGW32)

• scheme#1: Start Menu vs2015 tools VS2015 x86 本机工具命令提示 start msys.bat binding with mingw32 . (Don ' t use mingw64 )
• scheme#2: Add to the call "C:/Program Files/Microsoft Visual Studio 14.0/VC/vcvarsall.bat" 1st line of msys.bat . Then kick off msys.bat .

Confirm has vcvar 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  

nmakeIs the make programe under MSVC. Needed for making zlib . See later.

Fix collision between VC-linkand MSYS-LINK

• VC-linkLinks obj/libs files to create Exe/dll file
• MSYS-LINKCreates a link named FILE2 to an existing FILE1.

It is possible, msys‘s file linker or coreutils‘s linker conflicts with MSVC’s linker . You can find the running to see which link which link binary is using. If It /bin/link.exe is located at, MV to /bin/link.exe/bin/msys-link.exe

YasmX264

You need in 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.msc CFLAGS -MT -MD so the uses instead of, since this is what 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 and zconf.h remove its inclusion of unistd.h . This gets erroneously included when building FFmpeg.
• $ nmake -f win32/Makefile.msc
• Move zlib.lib , and to zconf.h zlib.h 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 msvcToolchain

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 ':

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 to see what grep "^CC" make.log files is 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 to see what env PKG_CONFIG_PATH=lib/pkgconfig/ pkg-config --libs libavdevice 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 is took as reference to decide Lib orders

# $(FFLIBS-yes) needs to be in linking orderFFLIBS-$(CONFIG_AVDEVICE)   += avdeviceFFLIBS-$(CONFIG_AVFILTER)   += avfilterFFLIBS-$(CONFIG_AVFORMAT)   += avformatFFLIBS-$(CONFIG_AVCODEC)    += avcodecFFLIBS-$(CONFIG_AVRESAMPLE) += avresampleFFLIBS-$(CONFIG_POSTPROC)   += postprocFFLIBS-$(CONFIG_SWRESAMPLE) += swresampleFFLIBS-$(CONFIG_SWSCALE)    += swscale

Set Preprocessor

clue#1: search ' cppflags ', ' CFLAGS ', ' cxxflags '. Asflags ' in ' Config.mak ' to-see-autoconfig deal with ' inline ', ' snprintf ' compatibility by setting '--toolchain=msvc ' O Ption.

clue#2: search ' ^cl ' in ' Config.log ', see that how MSVC compiler ' cl.exe ' is called. Here are 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"

Problemsfix collision between LIBCMT.liband 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) with some code link to dynamic RTL Solution:set MSV CR 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 '

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 have to link to the WINDOWS SDK, so is careful with how ' _win32_winnt ' defined in ' Config.mak ' or ' config.log ', copie D it to the VC preprocessors. Reference to the ' Set preprocessor ' section.

Debug FFmpeg in VC2015