Camera technology will be used from April to avoid the dispute and uncertainty which has dogged the Mark Duggan inquest.
Mr Duggan, whose death sparked protests that led to riots and looting across the country, was shot and killed when police stopped the taxi in which he was travelling in Tottenham, north London, in August 2011.
Following a four-month inquest, on Wednesday the jury found that although the 29-year-old had a gun in the cab, he probably threw it onto a nearby grass verge as soon as the car came to a stop.
Senior officers want to use the camera technology from April, to avoid the dispute and uncertainty which has dogged the Duggan investigation.
Metropolitan Police Assistant Commissioner Mark Rowley said earlier: “There are great benefits to having these incidents on video. Look at the Lee Rigby case – everyone knows what happened.
“We don't need all these different opinions and conjecture – it's much easier to get to the facts.”
The cameras are already used by some US police forces.
Metropolitan Police Commissioner Sir Bernard Hogan-Howe said the shooting had led to a “significant reduction in trust” between the capital's black communities and the police.
He said: “I know that we have much work to do with black Londoners to build trust and confidence in the Metropolitan Police.
“My officers do not set out to run an operation that results in someone dying. They are brave people who risk their own lives to keep the public safe.”
The Independent Police Complaints Commission said it was looking at new evidence that had emerged from the inquest, and the Duggan family are now considering whether to try to get the inquest conclusion judicially reviewed.