Design And Application Of SDK For Train CCTV Network Monitoring System

With China’s rapid economic development, security system has played a significant role in protecting people’s daily life. Closed-Circuit Television System (CCTV) is a kind of state-of-the-art integrated system with strong prevention ability, and it is an important part of security system today. With the rapid development of urban rail transit, the number of people making traffic system environment became more complex, which has brought the ground control center more difficulties on unified control and management. So it is very necessary for CCTV system to be brought in the field of rail transportation.During the train operation, the ground control center will monitor the vehicle-mounted running situation in real-time or selectively. In that way, the video transmission path between the monitoring equipment inside the vehicle and the ground control center is particularly important. In the actual project implementation process, the interior monitoring equipment supplier usually provides SDK to the user. The SDK encapsulates the monitoring process into calling interfaces, and they generally focus on the real-time monitoring and local playback. The present CCTVSDK adds real-time playback of stored video and alarm linkage calling interfaces based on achieving the above function.This thesis first introduces the development process of the train CCTV system and the application of stream media technology in video monitoring. Then the composition of the CCTV system and the development needs of ground control center are introduced. On this basis, the overall functional structure of CCTVSDK software is built. The function of each part in CCTVSDK program is analyzed. The realization of taking video streaming and development of the video preview function module are described in detail. Finally, a series of functional tests on CCTVSDK are finished to ensure the reliability of all the functional interface. This CCTVSDK plays an important role in ground monitoring center software developing process, and it connects board equipment and the ground control center based on Ethernet at the application layer, which makes programming simpler and more modular.The CCTVSDK has been released in a subway project now.