Peter Lindley Murray, 55, faced Launceston Magistrates Court to contest charges of hinder conveyance and having driven under the influence of intoxicating liquor.

He had earlier pleaded guilty to having exceeded 0.05, after recording a BAC reading of 0.352.

A husband and wife gave evidence for the prosecution that they had seen Murray driving erratically and dangerously through the streets of Launceston on June 4, about 5.30pm.

Their car was behind Murray for most of the trip, from the area of Hobart Road and the Kings Meadows Connector, until Murray pulled up in his driveway at Trevallyn.

The wife, who was the front seat passenger, had filmed part of Murray's driving using her mobile phone video camera.

The video was played to the court and it showed Murray's car veering outside its lane and having several close calls with large passing trucks.

Murray, who represented himself in court, chose not to give evidence or call witnesses.

Magistrate Simon Brown found Murray guilty of the two charges he had contested.

He will sentence Murray on February 21 at 2.15pm.