Method and system for generating an event video sequence, and camera comprising such system

摘要

A method of generating an event video sequence is disclosed. The method comprises receiving input image frames encoded into a sequence of image frames arranged in groups of pictures, each group of pictures having a GOP structure. The method further comprises storing a pre-event sequence (SEQ1) of image frames in a first-in-first-out buffer, said pre-event sequence (SEQ1) having a first predetermined GOP structure, upon receiving an event notification, retrieving the pre-event sequence (SEQ1) from the buffer, and generating the event video sequence by combining the pre-event sequence (SEQ1) and a post-event sequence (SEQ2) of image frames, said post-event sequence (SEQ2) having a second GOP structure, which is different from said first GOP structure. A system for generating an event video sequence is also disclosed, as well as a camera comprising such a system, and a computer program product with instructions adapted to carry out the method when executed by a processor.