Reinhard Nissl wrote: > AFD information appears in the video stream after user data startcodes > (0x000001B2) and these appear before picture start codes (0x00000100). User data and thus AFD can be in other places, too (in theory, I have no practical experience). Described in the MPEG-2 video spec. > /* check Active Format Description ETSI TS 101 154 V1.5.1 */ Yeah, that's the spec. AFAIK AFD is only used in the UK. Johannes