Hi, The libortp is distributed together with linphone. You can find the latest version here: http://download.savannah.nongnu.org/releases/linphone/1.5.x/source There should be a ORTP subdirectory in the tarball, with a distinct build system.
However, a friend of us helped us fixing problems with libortp several times. Most of his patches were included in libortp, but the lastest probably isn't. I think it's still worth trying, but be aware that a little more work on our side might be necessary. Otherwise, if you're on debian, we have a non-official patched package available. Good luck! -- David
