tv13.localization.iframes.tgz contains a directory tree with the official I-Frames for the iacc.2.a videos - for use in submitting localization results in the 2013 semantic indexing task. At the first level in the tree is a directory for each video file in the iacc.2.a collection, named using the file ID from the iacc.2.collection.xml file iacc.2 master shot reference in the active participant's area of the TRECVID website. Within each file-level directory is a directory for each shot in the file, named using the shot number from the master shot reference. Within the shot-level directory is a set of jpeg files, named with sequential numbers, each corresponding to an I-Frame om the shot.