Police will be able to enter domestic violence scenes with body-mounted cameras and record abused victims, crying children, smashed-up rooms and any other signs of abuse, under legislation to be introduced to State Parliament on Tuesday.

In a nationwide first, video statements from the victim, taken at the scene, and powerful video footage taken in the immediate aftermath of domestic violence incidents, will be used as evidence in court cases.

Minister for Women Pru Goward said it would increase the success rate of domestic violence prosecutions.

"Relying on a video-recorded statement reduces the possibility of the perpetrator intimidating the victim by trying to coerce them into withdrawing or changing their original version of events," she said.

Tanya Whitehouse, chair of the Women's Domestic Violence Court Advocacy Service NSW, welcomed the move, saying it would empower victims, as long as they had a say in whether the video was used.