Screen Lag or High Latency

Main Factors Affecting Latency and Lag

Screen mirroring latency is mainly determined by resolution and frame rate:

Resolution Impact

• High-resolution video streams require high hardware encoding capabilities from phones, some phones cannot smoothly process large-resolution video streams.
• High resolution also requires high network bandwidth, unstable networks can easily cause increased latency.
• Recommended testing:
  • 360×640 or 270×480 resolution, observe latency changes
  • Small resolution → Low latency, high smoothness
  • High resolution → Possibly high latency, smoothness limited by network

Frame Rate Impact

• Frame rate refers to the number of video frames displayed per second, higher frame rate means smoother screen.
• But too high frame rate increases network bandwidth pressure, too low frame rate makes screen not smooth.
• Recommended frame rate settings:
  • Good network speed → Frame rate 30fps
  • Poor network → Frame rate 10~20fps
  • Can gradually adjust according to actual network speed, find the best balance between smoothness and latency

Optimization Suggestions

1. Choose appropriate resolution and frame rate according to device performance and network environment.
2. ⚠️ Must operate after adjusting resolution or frame rate:
   • Click End All Remote → Disconnect
   • Then click Screen Sharing again
   • Otherwise video stream latency caused by other reasons may affect test results
3. Try to avoid running applications that heavily occupy network or CPU simultaneously to reduce latency.
4. If latency is still high, consider reducing resolution or lowering frame rate until smooth.

💡 Tip: Screen mirroring experience is jointly affected by device performance, network bandwidth and display resolution, recommended to test in different scenarios to find the best configuration.