Scottish rocker Edwyn Collins was "reassembling his past" during interviews for a documentary about his life.

The Possibilities Are Endless, which premiered at South by Southwest Festival (Sxsw) in Texas on Sunday (09Mar14), tells the story of the former Orange Juice frontman's life, focusing on his struggle back to health following two brain haemorrhages in 2005.

The documentary is directed by James Hall and Edward Lovelace, who admits the singer-songwriter had difficulty talking about his life when they began shooting the film because his memories were hazy.

Hall tells Scotland's Daily Record newspaper, "The interviews were about giving Edwyn the space that he didn't get in any other environment, with no one finishing his sentences or jumping in. In the early stages we would often just sit and wait, which I think was quite a weird process for him. He was reassembling his past."

Lovelace adds, "During the process, Edwyn would tell us about songs and we'd learn that way about the details. We often felt like Edwyn was remembering things for the first time."