Research On Key Technologies For Wireless Video Monitoring System Based On Raspberry Pi

With computer network communication technology, video codec technology and the rapid development of embedded technology, embedded- based network video monitoring system has been obtained rapid development, appeared on the market a lot about embedded network video monitoring and related products, but also its demand is more and more widely expanding, the application requirement is becoming higher and higher.This thesis mainly studies how to use the embedded development board combined with external devices for building a wireless network video monitoring system. The main research contents include video image capturing, video image processing, packaging and transmission of video information and video image display. The work is useful for opening up a new way for the realization of the development of small volume, low price,stable performance wireless network video monitoring system.The content of this research is to design and implement the embedded wireless video monitoring systembased on the Raspberry pi development platform. The main works are as following. First use Raspberry pi development board to connect USB camera and USB wireless network card of video monitoring system hardware platform; Then install Raspbian system on the platform of Raspberry pi, and cross compile the environment configuration of installation and setup and test environment; Select the Video for Linux two technology for Video image acquisition; Through the acquisition of video image format conversion, the formats are unified into YUV420, which can be used to encode the video data with H.264 coding technique. By adopting video transmission technology with IP/UDP/RTP protocol, the video acquisition platform and PC in the same local area network can be ensured. socket communication between the Raspberry pi development platform and PC is constructed by the WiFi network to implement the real-time video transmission; In PC terminal, via VLC streaming media player is used to receive and broadcast the real-time video image information on the development platform, achieve a model for wireless network monitoring system.