Empire magazine's Helen O'Hara told the BBC that most of the film has been shot but still had to be completed.
Walker, 40, died on Saturday when a Porsche being driven by a friend, who also died, crashed near Los Angeles.
Walker's publicist. Ame Van Iden, named the driver as Roger Rodas, with whom the actor owned a luxury car business.
The cast and crew of Fast & Furious 7 were taking a break from filming during the Thanksgiving holiday but were scheduled to reconvene in Atlanta on Sunday.
