Multimedia generating method and related computer program product

A computer program product, stored in a non-transitory storage device of a target electronic device, when executed by a control circuit of the target electronic device, enabling the target electronic device to conduct a multimedia generating operation, the multimedia generating operation comprising:

• communicating the target electronic device with a central relay server (CRS) via internet to conduct an identity authentication;
• receiving an activation command from the CRS via internet;
• after receiving the activation command, activating a websocket server module in the target electronic device to establish one or more network sockets between the target electronic device and other electronic devices, so that the target electronic device and other electronic devices communicate control parameters via the websocket server module;
• generating one or more corresponding images according to control parameters received from other electronic devices;
• and
• displaying the one or more images on a display of the target electronic device.