Hi Jean-Yves; In commit 7531972fb0d0aa99047f9156a4583aedae61d176, one of the lines changed in mythtv/libs/libmyth/libmyth.pro is: +HEADERS += audio/audiooutputdigitalencoder.h udip/spdifencoder.h Is is possible that udip should be audio? Thats the only place I can find spdifencoder.h. Thanks, Bill Meek