The rollout of 248 video cameras worn on police officers' uniforms across Sydney's eastern beaches started on Thursday and questions are being raised about their impact on the rights of individuals.

Council for Civil Liberties NSW president Stephen Blanks said there would be cause for suspicion in cases where an officer had a camera but did not use it.

"You should have a rule that where police have got a body camera and are giving evidence in court, they shouldn't be allowed to give evidence unless the body camera is on," he told AAP.

"The possibility that police are not being completely truthful about the evidence is too high."

Mr Blanks said instances where police misrepresented or misunderstood members of the public could be brought to light through video evidence.

"I think the public will have more confidence in police if they know that police are behaving in a thoroughly accountable way because they're being recorded," he said.

Mr Blanks suggested the camera be on at all times, saying having to manually turn it on and off meant officers could be selective about what to film.

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Source(s): Sky news OR Channel 9 News