Rather, it is created in the married print, when the optical soundtrack and frame lines are added.

The result of this processing is a 'married print'- the final master version of the commercial.

A married print is a film print which has had an optical soundtrack added onto the print.

When a married print is created, this frame is slightly re-cropped by the frame line and optical soundtrack down to Academy ratio (1.37:1).

Today, this system is usually used only for very low-budget or student productions, or for screening rough cuts of films before the creation of a final married print.

Because of this, a married print can not be edited, and thus should only be done when the picture edit has been "locked" (as well as the sound, of course).