Assertion: mm film | /r/CapableOf | represent 1 second of screen time
Facets:
value: roughly
type: DEGREE
value: in some early silent films
type: LOCATION
Source sentences:
text: The origin of the term "footage" is that early 35 mm silent film has traditionally been measured in feet and frames; the fact that film was measured by length in cutting rooms, and that there are 16 frames (4-perf film format) in a foot of 35 mm film which roughly represented 1 second of screen time (frame rate) in some early silent films, made footage a natural unit of measure for film.