1. A method, comprising: performing, by a system comprising a processor, a coarse feature analysis of a group of content streams at a multiple frame level; identifying, by the system, a subset of the group of content streams having a potential occurrence of a general feature according to the coarse feature analysis; determining, by the system, a level of confidence for the occurrence of the general feature in the subset; and generating, by the system, a weighted content description of the group of content streams based on the occurrence of the general feature; and generating, by the system, statistics associated with the weighted content description.