if (j->use() && j->type() == TEXT_CLOSED_CAPTION && j->dcp_track()) {
if (find(_tracks.begin(), _tracks.end(), j->dcp_track()) == _tracks.end()) {
_tracks.push_back (*j->dcp_track());
if (j->use() && j->type() == TEXT_CLOSED_CAPTION && j->dcp_track()) {
if (find(_tracks.begin(), _tracks.end(), j->dcp_track()) == _tracks.end()) {
_tracks.push_back (*j->dcp_track());