I downloaded the iFrameExtractor sample code and try to compile it with the iPhone simulator version 3.1.3 The project shows the following errors ( http://img514.imageshack.us/img514/3245/66948298.png ) even thought I added *.a libraries to my project. All libraries was under the library searching path. I guess it is a linking problem. Anyone can recommend to me a configuration for compiling ffmpeg on x86? Thanks in advance.