Method and system for determining encoding parameters of video sources in large scale video surveillance systems

A device for configuring a video source comprising an embedded encoder for generating a stream, the embedded encoder having at least one configuration parameter, at least one configuration parameter value making it possible to generate a reference stream, in a video-surveillance system comprising at least one virtual encoder configured to generate a plurality of virtual streams each corresponding to a distinct encoding configuration, each of the virtual streams being generated from a reference stream generated by the video source, the device comprising a microprocessor configured for carrying out the steps of:

• transcoding a reference stream generated by the video source to generate virtual streams according to distinct encoding configurations of the at least one virtual encoder;
• for each of the generated virtual streams, computing a similarity distance between the corresponding virtual stream and a reference stream generated by the video source;
• obtaining a quality indicator relative to a task to be carried out on a stream generated by the video source;
• selecting an encoding configuration of the at least one virtual encoder based on the computed similarity distances and the obtained quality indicator;
• and
• determining at least one configuration parameter value of the encoder of the video source as a function of the selected encoding configuration of the at least one virtual encoder and of a look-up table.