Measuring and Reducing Capture Latency
Understand and minimize capture-to-display latency for gaming, live production, and real-time monitoring.
The Problem
Noticeable delay between source action and captured video display. Important for gaming passthrough and live production monitoring.
The Solution
Magewell's FPGA-based processing provides under 1 frame of capture latency. Use HDMI loop-through for zero-latency monitoring. Reduce software processing chain for minimum display delay.
Step-by-Step Instructions
Use HDMI loop-through output for zero-latency monitoring on external display
In OBS: Disable all video filters on capture source (each filter adds processing delay)
Enable 'Low Latency' in capture device settings if available
Reduce preview resolution: Settings > Video > Canvas Resolution > Lower value
Disable V-Sync in streaming software
Use hardware decoding for preview playback
Close unnecessary video sources and scenes to reduce processing load
For gaming: Always play on loop-through display, not software preview
Pro Tips
- Magewell capture latency: typically 30-60ms (1-2 frames at 60fps)
- Loop-through output adds zero latency - identical to direct connection
- Software preview always adds latency - use hardware loop-through for monitoring
- Encoding latency is separate from capture latency
- For competitive gaming: Loop-through is essential - never play on software preview
Related Guides
Resolving 'No Signal' Issues with HDMI Capture
Complete troubleshooting guide for 'No Signal' errors with Magewell HDMI capture devices. Step-by-step diagnostics and solutions.
Fixing Audio Sync Issues in Video Capture
Diagnose and fix audio delay or lip-sync problems in your video captures. Audio sync offset configuration for OBS, vMix, and other software.
USB Bandwidth Issues and Solutions
Troubleshoot USB bandwidth problems causing dropped frames, stuttering, or device not recognized errors. Multi-device USB management.
Capture Device Not Recognized by Computer
Fix device detection issues when Windows or macOS doesn't recognize your Magewell capture device. Driver and USB troubleshooting.