![]() ![]() It should also be noted that lower-precision clocks can have the effect further compounded through environmental conditions such as temperature differences, especially under extreme conditions. Since cameras don’t require as precise of clocks to count frames as audio recorders require to record audio, it is often a place where manufacturers cut corners in terms of accuracy. To prevent this scenario from occurring, every clock on set needs to be slaved to one central master clock source generating Timecode, Genlock, and Wordclock for everything. ![]() ![]() It might not be noticed on relatively short takes (like in the narrative world), but since it’s a cumulative effect, any take that lasts 30-40 minutes or longer could start to noticeably lose sync. Each device’s clock has small differences compared to one another, and over time, these differences add up and are experienced in the form of drift. Once you hit "record" on any device, it relies on its own internal clock to govern frame rates and define what time is. It acts as a metadata reference point for how to stamp the first frame when you start recording. That’s because timecode doesn’t lock a camera or audio recorder’s clock to one another. When workflow and budget allow, it’s best to have timecode and genlock sync boxes on every camera, timecode, and wordclock on every audio recorder, a timecode smart slate providing two backup forms of alignment points, and an audio feed to the camera as a reference for the editor. As the old saying goes, “One is None, and Two is One.” Redundancy is always the best practice. Timecode is the preferred method of aligning audio and video in professional workflows, as it is much less labor-intensive than other methods and can save time and money in post-production. There are several ways to ensure everything can be synced in post, such as using a slate as a common sync point for both audio and video, or through the use of timecode metadata, matching audio waveforms, converting timecode recorded as audio, or visually burning in timecode via a timecode smart slate or timecode display. Any time they are recorded separately, they have to be synced in post-production, but that usually starts with workflows in production enabling the editor to do so. In most modern video production workflows, audio and video are typically recorded separately, allowing for higher-quality audio and more flexibility in production and post. Syncing audio isn't as difficult as you may think. ![]()
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