nightfly19 t1_iu3fqbz wrote on October 28, 2022 at 7:28 AM

Reply to comment by Uranium_moth in TIL, in film, a clapperboard’s purpose is ensuring proper synchronization of audio and video in post-production. It provides a distinct “clap” along with a visual event for the editor to reference at the start of a scene. by PianoCharged

I think sometimes it's done at the start and end to help compensate for audio drift too sometimes (reference points for both audio and video)

Uranium_moth t1_iu3fx4c wrote on October 28, 2022 at 7:31 AM

I work in the industry and have never seen this happen due to drift. Drift is very very slight and only going to be noticed beyond a take of over an hour. Even then, a resync isn't going to help

nightfly19 t1_iu3g9lu wrote on October 28, 2022 at 7:36 AM

I don't work in the industry and am just repeating what I've heard on the internet years ago, guess its a "fact" I can forget now

RonnieT49 t1_iu3t086 wrote on October 28, 2022 at 10:36 AM

The “endboard” is often used when the camera starts the scene too close to an object to get the board in.

insomaniac117 t1_iu4gwgn wrote on October 28, 2022 at 2:11 PM

While this isn't done on set, in post production we frequently use sync markers at the beginning and end of the program to help verify that the picture and sound are in sync and don't drift after converting between formats and frame rates.

These are typically a 1 frame beep/tone with a corresponding visual marker placed 2 seconds before program (the edited show or movie) starts and 2 seconds after it ends.

Iyellkhan t1_iu69vsi wrote on October 28, 2022 at 9:34 PM

generally speaking, if you get drift over the course of a single take either the camera or the sound recorder need repair. That, or someone screwed up the base time code settings (say the camera is set to 24fps for theatrical but the sound is set to 23.976 for tv), but if that happens on a professional set boy is someone getting yelled at. quite possibly fired.