When I try to build fobs on windows with Visual C++ .NET i got the following error:
Encoder.obj : error LNK2001: unresolved external symbol _first_image_format

I already changed first_avcodec with avcodec_find_encoder_by_name. So i tried to do the same with first_image_format by using guess_image_format. It compiles now but still got problems.
Any guess?

Thanks
   Lucio