Last Updated 3 months ago
Definition
A Common Marker is a slating technique used in multi-camera productions where all cameras record the same slate mark at the beginning or end of a take. This ensures that editors have a single, unified sync point across every camera angle during post-production.
In practice, the 2nd Assistant Camera (2nd AC) calls out “Common Marker!” before clapping the slate, signaling that the mark applies to all cameras rolling simultaneously.
Purpose and Use
When filming with multiple cameras—such as A-Cam, B-Cam, and C-Cam—it’s critical that each camera’s footage aligns perfectly in post-production. The common marker provides that shared reference.
It serves to:
- Synchronize sound and picture across multiple camera angles.
- Help editors identify the same moment in time across all camera files.
- Maintain clarity in camera reports, especially during complex multi-angle coverage.
- Prevent confusion between takes when multiple slates are in use.
How It Works
- Cameras Rolling: The 1st AD or camera operator confirms all cameras are recording (“A, B, and C are rolling”).
- Slate Call: The 2nd AC announces, “Scene 14, Take 2 — Common Marker!”
- Mark: The slate is clapped within view of all active cameras, providing a shared visual and audio sync point.
- Logging: Each camera assistant records the take as “Common” in their camera report to indicate it was marked for all cameras.
If not all cameras can see the same slate (for example, if they’re facing opposite directions), the 2nd AC may perform individual tail slates or camera-specific marks for those angles.
Top vs. Tail Markers
- Top Marker: The slate is clapped at the beginning of the take (most common).
- Tail Marker: The slate is clapped at the end of the take—useful when filming starts suddenly or when slating up front would disrupt action. Tail markers are typically turned upside down to indicate the take’s end.
Why It Matters
Common markers streamline post-production by giving editors and sync operators one clear, consistent reference across all footage. Without a unified slate, syncing multi-camera footage can become time-consuming and error-prone. The simple act of calling “Common Marker” saves hours in the edit suite and ensures footage remains perfectly aligned.
Related Terms
- [Slate] ? The board used to mark scenes and takes for synchronization.
- [Tail Slate] ? A slate marked at the end of a take, usually upside down.
- [Multi-Camera Production] ? A shoot using two or more cameras recording simultaneously.