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When using the UAV aerial survey platform to calibrate the optical glide path indicating angle of the optical assist system, it is necessary to determine the imaging center position of the aerial camera lens when the drone aerial photography passes through the optical glide path. Firstly, it is necessary to obtain the precise imaging time of the video frame of the aerial camera of the UAV calibration platform. Then, according to the coordinates of the phase center of the GPS antenna at the imaging time, combined with the attitude information of the UAV platform, the coordinate of the geometric center of the camera lens is obtained by coordinate transformation. In this paper, a video information superposition method based on SoC has been designed and implement, which making full use of embedded ARM core and media processing platform resources in SoC. The main function of the ARM core processor is to complete communication,and control with peripherals, and the audio and video decoding are completed by the dedicated media processing platform. The scheme using SoC special decoder chip has the advantages of flexible development and high integration.