The method of transmitting a video stream over a network between a transmission device and at least one reception device comprises: —a step (502) of encoding so-called “primary” data of the video stream according to a first type of encoding, —a step (516, 518) of obtaining so-called “secondary” video data, dependent on the primary data, by the simulation of transmission errors potentially suffered by the video stream and at least one method of masking losses due to said transmission errors able to be implemented by a reception device able to decode the primary video stream encoded according to the first type of encoding, —a step (520, 522) of encoding secondary data according to a second type of encoding different from the first type of encoding, and —a step of transmitting, by means of the network, primary data encoded according to the first type of encoding and at least some of the secondary data encoded with the second type of encoding.