"Film"/"Studio" qualifying adjective on credits for title shot both on film and VT

When a TV programme is made as a combination of film and studio (VT), and the on-screen credits distinguish between roles - eg "film editor", "VT editor", "film cameraman", "studio cameras", "film sound", "studio sound" - should the word "film" be included in the attribute, or should it be implied by the absence of an attribute?

In other words, which of the following is correct:

EDITOR
John Smith (film)
Bill Smith (videotape)
SOUND
Arthur Smith (sound: film)

Joe Smith (sound: studio)

or

EDITOR
John Smith
Bill Smith (videotape)
SOUND
Arthur Smith (sound)

Joe Smith (sound: studio)