Timecode Offset Calculator

When working with timecode for video and audio syncornizing, sometimes you don't have timcode available on all devices even when using multiple [Tentacle Sync E](https://crsp.li/TentacleSyncE) devices. Then you can still sync cameras by showing a timecode slate ([Tentacle Timecode App](https://crsp.li/TentacleApps) for iOS) to the camera when you start recording (or at the end) and then later adjust the frame offset.