This facial mapping technology has been designed to improve television language dubbing, but it also has strong potential for those seeking to deceive.

BBC's Media Editor Amol Rajan looks at the benefits and risks - and tries it out himself.

This story is part of a series by the BBC on disinformation and fake news - a global problem challenging the way we share information and perceive the world around us.

To see more stories and learn more about the series visit www.bbc.co.uk/beyondfakenews