ATEM Camera Control Over SDI - How To Do It

Blackmagic ATEM SDI users can achieve multi-camera control over long distances using SDI cables, enabling professional setups for larger venues while maintaining the portable ease and simplicity of the ATEM Mini switcher.

We tested a solution for controlling multiple Blackmagic Pocket Cinema Cameras over long SDI cable runs using the ATEM SDI Extreme ISO switcher. The setup enabled full camera control and synchronization across 5 cameras in a large venue production environment.

Productions often need to extend beyond HDMI's distance limitations while maintaining integrated camera control. This setup provides a practical solution for larger venues without sacrificing functionality.

Behind the Scenes

Core equipment needed:

• ATEM SDI Extreme ISO switcher

• USB-C version of BiDirectional Blackmagic Micro Converters

• Two SDI cables per camera (one in, one out)

• Blackmagic Design SDI Distribution Amplifier for managing multiple camera returns

The setup delivered several benefits:

• Achieved camera control up to 1,500 feet

• Centralized recording start/stop across all cameras

• Unified timecode distribution to cameras

• Full tally light functionality for operators

• Option for program/multiview monitoring at camera positions

Notable limitations we encountered:

• Camera exposure controls through ATEM software showed inconsistencies

• No clear solution for routing timecode to external sound recorders

• Camera ID settings require double-checking due to software quirks

What's Next

Blackmagic's SMPTE ST-2110 hardware announcements at NAB suggest future solutions may consolidate these setups to single Ethernet connections, potentially simplifying complex multi-camera productions.

The Bottom Line

While not perfect, this configuration offers a viable solution for professional multi-camera production in large venues, particularly for those invested in the Blackmagic ecosystem.