Frame

A frame is a still image. Video is made up of many frames per second to create the illusion of movement.

Types

Digital video compression techniques involve compression of frames:

I-frame

A full 'Intra-coded picture'

P-frame

'Predicted' from previous frame(s)'s picture

B-frame

'Bi-predictive' or 'Bidirectional' calculated from surrounding frames's pictures. Can painlessly be skipped.