I don´t know any freeware or open source, but vprove(http://www.vqual.biz/Vprove.html) and VISUALmpeg(http://www.mpeg-analyzer.com/) can it. Both are WIN32 only. Robert Vincenz -- This is the x264-devel mailing-list To unsubscribe, go to: http://developers.videolan.org/lists.html