ffmpeg vc2010 lib修复

在有的时候使用VC开发环境链接ffmpeg库文件后，生成的文件无法运行，这有可能是由于.lib文件与.dll文件不匹配造成的。

使用VC开发环境提供的lib.exe工具通过*.def文件重新生成*.lib文件，批处理命令示例如下： 

@echo off
cd\
c:
cd C:\Program Files\Microsoft Visual Studio 10.0\VC
call vcvarsall.bat
@rem 这里设置win32 def文件目录
SET ffmpeglibpath=G:\ffmpeg-1.2\win32\lib
lib /MACHINE:X86 /DEF:%ffmpeglibpath%\avcodec-54.def  /OUT:%ffmpeglibpath%\avcodec.lib
lib /MACHINE:X86 /DEF:%ffmpeglibpath%\avformat-54.def  /OUT:%ffmpeglibpath%\avformat.lib
lib /MACHINE:X86 /DEF:%ffmpeglibpath%\avutil-52.def  /OUT:%ffmpeglibpath%\avutil.lib
lib /MACHINE:X86 /DEF:%ffmpeglibpath%\avfilter-3.def  /OUT:%ffmpeglibpath%\avfilter.lib
lib /MACHINE:X86 /DEF:%ffmpeglibpath%\avdevice-54.def  /OUT:%ffmpeglibpath%\avdevice.lib
lib /MACHINE:X86 /DEF:%ffmpeglibpath%\swscale-2.def  /OUT:%ffmpeglibpath%\swscale.lib
lib /MACHINE:X86 /DEF:%ffmpeglibpath%\swresample-0.def  /OUT:%ffmpeglibpath%\swresample.lib
lib /MACHINE:X86 /DEF:%ffmpeglibpath%\postproc-52.def  /OUT:%ffmpeglibpath%\postproc.lib
del %ffmpeglibpath%\*.exp
@rem 这里设置x64文件目录
SET ffmpeglibpath=G:\ffmpeg-1.2\x64\lib
lib /MACHINE:X64 /DEF:%ffmpeglibpath%\avcodec-54.def  /OUT:%ffmpeglibpath%\avcodec.lib
lib /MACHINE:X64 /DEF:%ffmpeglibpath%\avformat-54.def  /OUT:%ffmpeglibpath%\avformat.lib
lib /MACHINE:X64 /DEF:%ffmpeglibpath%\avutil-52.def  /OUT:%ffmpeglibpath%\avutil.lib
lib /MACHINE:X64 /DEF:%ffmpeglibpath%\avfilter-3.def  /OUT:%ffmpeglibpath%\avfilter.lib
lib /MACHINE:X64 /DEF:%ffmpeglibpath%\avdevice-54.def  /OUT:%ffmpeglibpath%\avdevice.lib
lib /MACHINE:X64 /DEF:%ffmpeglibpath%\swscale-2.def  /OUT:%ffmpeglibpath%\swscale.lib
lib /MACHINE:X64 /DEF:%ffmpeglibpath%\swresample-0.def  /OUT:%ffmpeglibpath%\swresample.lib
lib /MACHINE:X64 /DEF:%ffmpeglibpath%\postproc-52.def  /OUT:%ffmpeglibpath%\postproc.lib
del %ffmpeglibpath%\*.exp
pause

 将上面的文本复制为批处理，并修改lib文件目录路径，即可重新生成lib文件。