MPEG-1 encoding
352x288 pixels per frame @ 25 fps giving near-VHS quality at 1.5 Mbps; can be decoded on an (old) PC, encoding requires hardware;
MPEG stream has I-, P- and B-frames in a given pattern;
I-frame is a JPG image; each frame divided into 16x16 pixel macroblocks and in B- and P-frames, equivalent macroblocks are compared and a motion vector generated if possible;
I-frame ((B-frame)*, P-frame, (B-frame)*)* I-frame