4K流播出系统属于播出分发环节内容,当前成熟应用案例较少,各类产品侧重点不同,有的专注转码,有的专注播出,本文基于开源软件构建了一套功能相对完善的4K流播出系统。该系统主要包括两大部分,即整备环节及流播出环节,整备环节包括从素材入库到向播出服务器迁移等一系列功能模块,流播出环节主要负责本地素材的串流播出。从系统最终运行及播出效果来看,该系统已初步具备了全流程4K流播出能力。 The 4K streaming system belongs to the broadcast distribution section. There are few mature application cases at present, and the focus of each product is different. Some focus on transcoding and others focus on broadcasting. Based on the open source software, this paper constructs a set of relatively complete 4K streaming system. The system mainly consists of two parts, that is, the curfew and the streaming part. The curfew includes a series of function modules from material storage to the playout server migration. The streaming part is mainly responsible for the streaming of local material. From the system’s final run and broadcast results, the system has initially had the whole process 4K streaming capabilities.