Festival organizer Michael Eavis says the BBC will air about an hour of the Stones' set as part of its extensive TV coverage of the event.
The BBC and the band both said negotiations were continuing, with the BBC on Friday calling the talks "extremely constructive."
The Stones are scheduled to headline Glastonbury's biggest stage on June 29, the festival's most prestigious slot.
Some 135,000 music fans are due at the June 26-30 festival in southwest England. The lineup includes Arctic Monkeys, Elvis Costello, Kenny Rogers and Mumford & Sons.