Problem when linking with the 32bits dev build

[antares]

Hi,

I try to make a short sample of ffmpeg with qt in order to use it in a professional projet, so I have download the last version of the 32 bits dev build and I have include avformat.h in my code, and a link to avformat.lib. But When I try to build, there is an "undefined reference" to the first ffmeg function then I use, here "avformat_alloc_context".

Have you any idea?

Thanks