1. A method of archiving multimedia data, comprising: receiving a multimedia data signal having content that progresses based on a timing; converting the multimedia data signal into a searchable format; identifying a set of features in the searchable format; determining a set of confidence values for the searchable format that estimates the accuracy of the features in the searchable format as a function of the timing of the multimedia data signal; and storing the searchable format into a database that is indexed based on the set of features and the confidence values.