Patent ID: 8599277

Claim:
A video data play back apparatus comprising: an obtaining device configured to select a camera from a plurality of cameras, and to obtain live video data from the selected camera and recorded video data from a recording device, wherein the recorded video data is video data from the selected camera; a display device configured to display a timeline indicating a range of time points, which includes time points of the recorded video data and a current time, and to display a play head which moves on the timeline to indicate a time point of video data being played back; and a play back device configured to play back the recorded video data corresponding to the time point indicated by the play head, wherein said play back device plays back the live video data received from the selected camera at the current time in response to the play head moving to indicate the current time, and wherein said play back device plays back the recorded video data received from the recording device in response to the play head moving to indicate a past time.