Conforming Tape-Based Material > Timecode and Keycode >

# About the Keycode Calculator

When typing keycode values directly into the Keycode field, you use the keycode calculator.

You can select the film manufacturer and emulsion in the keycode calculator to determine the first two values of the keycode.

(a) Keycode field(b) Film Manufacturer box(c) Film Emulsion box(d) Framerate box(e) Film Gauge box(f) Reference Foot box

Keycode field
  Indicates the keycode value for a frame or for the first frame of a sequence. Click to enter a new keycode value. Subsequent frames are assigned a keycode value incremented from this value in relation to the settings in the Film Gauge box, and optionally, the Reference Foot box when using 3-perf 35 mm film.

NoteAlthough you can enter any two letters in the Keycode field to begin a keycode value, only those corresponding to an actual manufacturer and film emulsion populate the Film Manufacturer and Film Emulsion fields.

Film Manufacturer box
  Select the manufacturer of a source film reel. If you type a value in the Keycode field, the corresponding manufacturer is automatically selected in this box: the first letter of the keycode value indicates the manufacturer.
Film Emulsion box
  Select the emulsion of a source film reel. If you type a value in the Keycode field, the corresponding manufacturer is automatically selected in this box: the second letter of the keycode value indicates the film's emulsion. Only the film emulsions that correspond to the film manufacturer selected in the Film Manufacturer field appear.
Framerate box
  Select the framerate used when importing files that retain keycode. This value should be set at the framerate at which the film was transferred to video.
Film Gauge box
  Select the type of source film from which the frames originated. This is used to assign keycode to a sequence of frames starting with the value entered in the Keycode field.
Reference Foot box
  Select the reference foot for 35 mm / 3 perf film. Reference Foot is only active when Film Gauge is set to 35 mm / 3 perf. This number is necessary because 3-perf 35 mm film has a different number of frames in each foot of a 3-foot repeating sequence.

#### Topics in this section

- Keycode Syntax
- Supported Film Emulsions
- Supported Film Gauges