It was made for the Tropfest short film festival, where it was a finalist.
It went viral after it was uploaded to YouTube, and has featured on many web sites.
With a bigger budget and all-star cast, the film grew from seven minutes to a full length feature film of 105 minutes.
It was filmed at Wilpena Pound, Flinders Ranges and the Murray River, in South Australia.
English actor Martin Freeman seems to specialise in mild-manner characters who find themselves in extraordinary circumstances and as such is well cast for his role in Cargo.
Freeman is probably best known for his portrayal of Bilbo Baggins in Peter Jackson‘s The Hobbit film trilogy.
He also played Tim Canterbury in the original UK version of the mockumentary The Office (2001), Dr John Watson in the British crime drama Sherlock (2010) and Lester Nygaard in the dark comedy-crime drama TV series Fargo (2014).