Optimizing AVCaptureMultiCamSession Without Burning the Device

Multi-camera work looks glamorous until the device starts heating up and your frame budget disappears.

Here is the rule I follow first: protect stability before visual quality. A recording flow that survives long sessions is more impressive than a flashy demo that dies under pressure.

Checklist I use

• Prefer lower preview sizes when the recording pipeline is already heavy.
• Watch system pressure and thermal state continuously.
• Disable optional effects before the OS forces a harsher fallback.
• Log every capture reconfiguration path.

Why this matters

Recruiters and teams care less about a camera demo and more about whether you can keep it reliable on real hardware.