[FFmpeg-user] Can't locate entry av_aes_crpyt in avutil-49.dll

[Erik]

> 
> Your avutil-49 is too old. The modern version is avutil-50. Also you should
> not ever
> try to cross FFmpeg libraries from different sources - they have too much
> cross dependencies
> and you'll got a broken setup in most cases.
> 
> Win binaries you can download here http://win32.libav.org/ and here

I tried this version and the problem changed to can't locate entry of 
av_alloc_format_context at avformat-52.dll. Seems the main problem is in this 
file? I noticed in some of the includes, the include path has an additional 
directory name(e.g. #include "libavutil/avconfig.h" in a include already in 
the libavutil directory), which makes gcc fail but ok in VC.
Is the entry error a incompatible issue with VC? If so, if i want to build it 
in gcc, how to solve the directory problem, can i simply remove the directory 
names in includes?