Live video preview failed.

Problems and Phenomena.
Live video preview failed.

Analysis steps:
1.Confirm the public IP / LAN IP configuration of the server.
2.Confirm port.

Step 1:Confirm the public IP / LAN IP configuration of the server.

Suggestion: if it is a single server, it is recommended to configure the LAN address as 127.0.0.1 and the public network address as the public network address

Step 2: Confirm port.

Determine whether the configuration of each server is consistent as shown in the figure below