While flying a film director and camera man, the pilot positioned the helicopter behind a moving truck to film the contents in the truck's bed. Unaware that terrain was rising, the pilot observed a static power line across the helicopter's path at the last second. The pilot attempted to avoid the power line by flying underneath it; however, the main rotor mast impacted a wire. The pilot was able to perform a successful autorotation to the ground. The helicopter's tail boom, tail rotor, vertical stabilizer, and main rotor control linkages sustained substantial damage. The pilot reported no preimpact mechanical malfunctions or failures with the helicopter that would have precluded normal operation.