An item with enclosure An item with enclosure and itunes duration ("20:20" == 1220 seconds) 20:20 An item with enclosure and itunes duration ("20:20:00" == 73200 seconds) 20:20:00 An item with enclosure and itunes duration ("20:20:20" == 73220 seconds) 20:20:20 An item with enclosure and invalid itunes duration ("-50") -50 An item with enclosure and invalid itunes duration ("50 minutes 4 seconds") 50 min 4 sec An item with enclosure and itunes duration in seconds ("1220") 1220 An item with two enclosures and itunes duration (1220). 1220