一种保证初始数据完整性的实时视频流分发插件①.PDFVIP

计 算 机 系 统 应 用 2017 年 第 26 卷 第 5 期 一种保证初始数据完整性的实时视频流分发插件① 张 凯 (苏州科达科技股份有限公司 上海研发中心, 上海 201103) 摘 要: 在视频监控联网系统中进行实时监控时, 如果监控客户端收到的初始视频数据不完整会出现初始播放 画面花屏的问题. 基于开源多媒体框架GStreamer, 针对H.264 编码标准, 设计并实现了一种实时视频流分发插件. 该插件使用随机创建的请求型 source 衬垫用于视频数据的分发, 并通过缓存当前 IDR 帧组的方法确保发送初始 视频数据的完整性. 该插件可应用于流媒体服务器当中, 解决实时监控时初始画面花屏的问题. 实验结果表明, 应用该插件的流媒体服务器能够高效分发实时视频数据并保证初始播放画面完整, 对提升实时监控效果有着明 显的作用. 关键词: 视频监控; 流媒体服务器; GStreamer 框架; H.264 标准; IDR 帧; RTP 协议 Real Time Video Stream Dispatch Plugin for Ensuring the Integrity of Initial Data ZHANG Kai (Suzhou Keda Technology Co. Ltd., Shanghai R D Center, Shanghai 201103, China) Abstract: In the real time video surveillance network system, if the initial video data received by the monitoring client is not complete, the screen will show blurred screen. For H.264 coding standard, this paper designs and implements real time video stream dispatch plugin based on the open source multimedia GStreamer framework. The plugin uses a randomly requested source pad to dispatch video data. It also caches current IDR frames group to ensure the integrity of initial IDR frame to be sent. The plugin can be used in streaming media server to solve the problem of the blurred screen of initial screen effect in video surveillance. Experiment shows that the streaming media server with this plugin can effectively distribute the real time video data and ensure the integrity of the initial playback screen, which has a significant effect on improving the real-time monitoring effect. Key words: video surveillance; streaming media server; GStreamer framework; H.264 standard; IDR frame; RTP protocol 视频监控联网系统中使用 IPC(IP Camera 网络摄 为解决这一问题, 需要在视频流分发侧保证发送 像机)作为监控前端采集实时视频流, 通过流