When I run this: ffprobe -sexagesimal -select_streams v -show_frames -of flat -i e:\00305.m2ts where 00305.m2ts is AVC, it reports such things as this: frames.frame.0.pict_type="I"? AVC does not have I-frames (or P-frames or B-frames), so, what does it mean? Just asking... Anyone know? --Mark.