1, Please go to Record / Parameters / Record to check if the live view stream is full frame rate.
2, Check network conditions. The possible reasons are network congestion and packet loss. We may use ‘Ping’ command to check if network congestion exists. Besides, we may check if lags occur in the record which usually caused by packet loss.
3, Check if the problem is caused by IPC. We may check the IPC live view in IE browser, if the same problem exists, please refer to IPC troubleshot.