[Ffmpeg-devel] for help

[张 健]

Hi all:
    I'm a China fan of ffmpeg,and i've studied ffmpeg for about 3 weeks.I 
meet trouble when i compile ffmpeg.c in VC6.0 following the steps from 
URL://ffmpeg.mplayerhq.hu/ffmpeg-doc.html.
    First I successfully generate avcodec.lib,avformat.lib,avutil.lib and 
the corresponding dll with the help of MinGW and MSYS.Secondly i 
successfully compile ffmpeg.cpp and cmdutils.cpp in VC6.0,but it produce 
the following errors when link:


Linking...
ffmpeg.obj : error LNK2001: unresolved external symbol "int loop_input" 
(?loop_input@@3HA)
ffmpeg.obj : error LNK2001: unresolved external symbol _first_image_format
ffmpeg.obj : error LNK2001: unresolved external symbol _first_avcodec
ffmpeg.obj : error LNK2001: unresolved external symbol "int __cdecl 
frame_hook_add(int,char * * const)" (?frame_hook_add@@YAHHQAPAD at Z)
ffmpeg.obj : error LNK2001: unresolved external symbol "struct AVOption * 
__cdecl av_set_double(void *,char const *,double)" 
(?av_set_double@@YAPAUAVOption@@PAXPBDN at Z)
ffmpeg.obj : error LNK2001: unresolved external symbol "double __cdecl 
av_get_double(void *,char const *,struct AVOption * *)" 
(?av_get_double@@YANPAXPBDPAPAUAVOption@@@Z)
ffmpeg.obj : error LNK2001: unresolved external symbol _first_protocol
ffmpeg.obj : error LNK2001: unresolved external symbol _first_iformat
ffmpeg.obj : error LNK2001: unresolved external symbol _first_oformat
ffmpeg.obj : error LNK2001: unresolved external symbol "int ffm_nopts" 
(?ffm_nopts@@3HA)
ffmpeg.obj : error LNK2001: unresolved external symbol "struct AVOption * 
__cdecl av_set_string(void *,char const *,char const *)" 
(?av_set_string@@YAPAUAVOption@@PAXPBD1 at Z)
ffmpeg.obj : error LNK2001: unresolved external symbol "int __cdecl 
av_opt_show(void *,void *)" (?av_opt_show@@YAHPAX0 at Z)
ffmpeg.obj : error LNK2001: unresolved external symbol _select at 20
ffmpeg.obj : error LNK2001: unresolved external symbol "void __cdecl 
frame_hook_process(struct AVPicture *,enum PixelFormat,int,int)" 
(?frame_hook_process@@YAXPAUAVPicture@@W4PixelFormat@@HH at Z)
Debug/ffmpeg.exe : fatal error LNK1120: 14 unresolved externals
Error executing link.exe.

ffmpeg.exe - 15 error(s), 0 warning(s)

    Here I must point out that i've set the library pointer point to the 
correct directory. Without this pointer it will produce about 98 
errors.Then i checked the above mentioned 3 lib,i found that all the above 
mentioned unresolved external symbol are all in the 3 libs.I don't know 
why.
    Any reply is welcome.
    Thanks in advance.

    --ZHANGJIAN

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