A 44-year-old man has admitted being in possession of more than 20 hours of video footage of child porn.
Dundee Sheriff Court heard Brian Clark also had nearly 450 images of child abuse.
Clark, a prisoner of Perth, previously served a prison sentence for lewd and libidinous practices.
His licence had expired just 10 days before he bought himself a laptop and began downloading indecent images of children.
Clark was still subject to a supervised release order when police received intelligence regarding his behaviour.
Fiscal depute Nicola Gillespie said police executed a warrant at his home.
She said: “Indecent images were found on the USB, some of which were accessible and others had been deleted and recovered. On the USB, 192 images were found and 58 videos. Some of the videos were described as extremely graphic.
“The age range of the children involved was from one year to 16 years, and involved both male and female children.
“On the laptop, 256 images and 210 videos were found, again some of which were accessible and some which had been deleted and were recovered.”
Clark admitted that between May 31 and June 29, at Aboyne Avenue, he took, permitted to be taken and made indecent photographs or pseudo photographs of children.
Sheriff George Way said: “Almost as soon as he thought it was clear for him to access the internet he went and bought himself a laptop and did this, and that suggests to me there may be some sort of psychological problems.”
Sentence was deferred until December 16 for reports and Clark was remanded meantime.