Silent film: Encyclopedia II - Silent film - Projection speed

Silent film - Projection speed

Up until around 1925, most silent films were shot at slower speeds (or "frame rates") than sound films, typically at 16 to 23 frames per second depending on the year and studio, rather than 24 frames per second. Unless carefully shown at their original speeds they can appear unnaturally fast and jerky, which reinforces their alien appearance to modern viewers. At the same time, some scenes were intentionally undercranked during shooting in order to accelerate the action, particularly in the case of slapstick comedies. The intended frame rate of a silent film can be ambiguous and since they were usually hand cranked there can even be variation within one film. Film speed is often a vexed issue among scholars and film buffs in the presentation of silents today, especially when it comes to DVD releases of "restored" films; the 2002 restoration of Metropolis (Germany, 1927) may be the most fiercely debated example.

Most films seem to have been shown at 18 fps or higher - some even faster than what would become sound film speed (24 fps). Even if shot at 16 fps (often cited as "silent speed"), the projection of a nitrate base 35mm film at such a slow speed carried a considerable risk of fire. Oftentimes projectionists would receive instructions from the distributors as to how fast particular reels or scenes should be projected on the musical director's cue sheet. Theaters also sometimes varied their projection speeds depending on the time of day or popularity of a film in order to maximize profit. [1]

Adapted from the Wikipedia article "Projection speed", under the G.N U Free Docmentation License. Please also see http://en.wikipedia.org/wiki