On Sun, Jan 24, 2010 at 03:48:29PM -0600, Rolf Ernst wrote: > libavformat/libavformat.a .... undefined reference to 'usleep'. > > Maybe I'll wait until later. Seems like you are still busy checking in and > out ... I think you'll have to update your MinGW installation, I think mingw-runtime 3.15 is what's required.