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The video applications become popular with the development of the network. Because of the complexity of the network and real-time stream video on demand, the scheduling algorithm has great influence on the QoS. In this paper, a stream video scheduling algorithm based on QoS is proposed, associated the FEC and Kalman Filter theories. According to the status of the receiver, the sending rate is adapted automatically. The state of the scheduling algorithm is analyzed. This algorithm can maintain the continuity of the video transmission. The simulation results are given, which indicate the scheduling algorithm can provide good video service.