Abstract
QoS is essential for ubiquitous access of media services in real-time distributed video surveillance. In order to have ubiquitous access of desired media through emergency official's different handheld devices, appropriate media transcoding services need to be used. Now, the challenge is to select and compose these services for each of the devices to satisfy the desired QoS demand. To this end, this paper presents a QoS-aware service composition algorithm to select the best composition for the target client. We have implemented a prototype of service composition for video surveillance by using the proposed QoS-aware composition algorithm. Simulation is results shows that the framework is scalable and suitable for real-life distributed video surveillance.