Identification slate with hinged, striped top that smacks together for on-camera scene initiation. Originally used to synchronize movie sound with picture. [See lip-sync] closeup: (CU) A tightly framed camera shot in which the principal subject is viewed at close range, appearing large and dominant on screen. Pulled back slightly is a "medium closeup" while zoomed in very close is an "extreme closeup (ECU or XCU)." CODEC (compressor/decompressor) A piece of software that converts a raw stream of uncompressed video to a compressed form. The same piece of software can also play the compressed video on-screen.

A Clapstick is a single stick-shaped instrument. They are normally used in pairs - when it becomes known as clapsticks or clappers - to create a sharp and distinct percussive sound, and may then either be held separate or be attached together with string or a hinge.