A Melbourne paedophile who filmed and photographed himself sexually abusing 47 boys across four countries will spend at least 28 years behind bars.

Boris Kunsevitsky, 53, produced more than 35,000 photos and 4800 videos of abuse across the Philippines, Singapore, Indonesia and Australia between 2002 and 2017.

Boris Kunsevitsky abused boys across the Philippines, Singapore, Indonesia and Australia.

Supreme Court of Victoria Justice John Champion on Wednesday jailed Kunsevitsky for a maximum of 35 years, labelling the paedophile's appetite for sexual abuse insatiable and the offending the worst he had seen.

Most of the abuse was committed against boys in the Philippines, with Kunsevitsky making the boys perform sexual acts on themselves and each other, and filming and photographing it, among other depraved acts.