Hello! here http://trac.pjsip.org/repos/wiki/Getting-Started/Windows I see: "In addition, the following SDK's are needed: - Essential: DirectX SDK (tested with DirectX version 8 and 9). After installing DirectX, add the paths to the include files and the library to Visual Studio. - Optional if not using Visual Studio 2008: Platform SDK (tested with Platform SDK for Windows Server 2003 SP1). - Optional: OpenSSL development kit is needed if TLS support is wanted. Learn more: Installing OpenSSL Libraries on Windows<http://trac.pjsip.org/repos/wiki/Getting-Started/Installing-OpenSSL-Windows> ." So you should add: 1) DirectX SDK, (I use Microsoft DirectX SDK (March 2009)) 2) Platform SDK (Vista SDK - it's works under win XP and Win7, it just called "Vista" :-) ) 3) FFMPEG libraries see here http://ffmpeg.zeranoe.com/builds/ you should use same version of dev(for includes and libraries) and shared (for dll) - I use ffmpeg-git-7d531e8-win32 version cheers -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20120517/0b1167f9/attachment.html>