Live-action film shot, one continuous shot, no cuts, no scene change, the camera

Live-action film shot, one continuous shot, no cuts, no scene change, the camera stays in the same place for the whole clip. A misty stone river embankment. A woman in a red gown sits in a small white rowing boat drifting on the water at the left. High on the right a man in a black overcoat walks along the top of the embankment wall, staring at her lovesick, not looking down. He steps off the e...