基于 RTP 的机载网络视频实时监控系统设计-《计算机技术与发展》

文章信息/Info

Title:: Design of Real-time Monitoring System of Airborne Net Videos Based on RTP

Author(s):: HAO Zhao; WANG Hao; Chinese Flight Test Establishment,Xi’an 710089,China

Keywords:: RTP / RTCP; airborne network video; FFmpeg; SDL; multithread; real-time monitoring

摘要:: 在飞行试验中,视频实时监控是保障试飞安全和提高试飞效率的重要环节。为了解决某型机机载网络视频的实时监控问题,提出了基于 RTP/ RTCP 协议的机载网络视频实时解析系统设计方案。通过 UDP 组播协议接收网络电台发送的 RTP/ RTCP 数据包,经过解包,拼成完整的一帧视频图像,采用 FFmpeg 进行视频解码并利用 SDL 进行显示。首先介绍了遥测网络视频实时监控系统架构,重点介绍了 RTP/ RTCP 协议及解包方法,然后论述了视频解码与显示流程、YUV 图像处理算法。软件采用模块化、多线程并发和多缓冲区设计思路,提高处理效率,保证网络视频监控的实时性和功能的可扩展性。目前该软件已成功应用于某型号任务视频实时监控中。实际应用效果表明,视频播放效果清晰流畅,该软件具有良好的实时性、可靠性和人机交互功能,有效保证了试飞安全。

Abstract:: In flight test,video real-time monitoring is an important part to ensure flight safety and improve the efficiency of flight test. Inorder to solve the real-time monitoring problem of airborne network video of a certain type of aircraft,we propose a design scheme of airborne network video real-time resolution system based on RTP / RTCP. The RTP / RTCP packets sent by network radio are received byUDP multicast protocol,and the complete one frame video image is combined through unpacking,and the video is decoded with FFmpegand SDL is used to display it. Firstly,the architecture of video real-time monitoring system for telemetry network video is introduced.The RTP / RTCP and the method of unwrapping are introduced. Then the video decoding and display process and the algorithm of YUVimage processing are discussed. The software adopts the modular, multithread concurrent and multi buffer design to improve theprocessing efficiency and ensure the real-time and functional scalability of the network video monitoring. At present,the software hasbeen successfully applied to real-time video monitoring of a certain type mission. The practical application results show that the videoplay is clear and fluent and the software has a better real-time,reliability and human-computer interaction which can ensure the safety oftest flight effectively.