if ( (!type || type->value() == "audio") && ((*it)->property ("diskstream") != 0 || (*it)->property ("diskstream-id") != 0)) {
try {
elements.push_back (ElementPtr ( new AudioTrackImporter (source, session, *this, **it, pl_handler)));
if ( (!type || type->value() == "audio") && ((*it)->property ("diskstream") != 0 || (*it)->property ("diskstream-id") != 0)) {
try {
elements.push_back (ElementPtr ( new AudioTrackImporter (source, session, *this, **it, pl_handler)));