基于优先级的视频内容采集策略研究

Research of Video Content Gathering Based on Priority Strategy

针对不同类别视频采集的实时性要求不同的情况,本文采用基于优先级的强占式采集策略,在考虑视频类别、视频文件大小、采集任务已等待时间、任务重试次数等因素后,确定采集任务的优先级,并根据已采集任务的历史周期性地重新计算采集任务的优先级,从而调整队列中任务的执行顺序。本文通过两类视频进行仿真,实验结果表明,该分配策略能在两类视频发送总等待时间上取得平衡,并能调整参数对两类视频的采集顺序进行调整,为视频内容的采集带来灵活性。

In order to satisfy the different realtime demand of the video content gathering, this paper proposes a preemptive multi - priority based strategy for task priority assigned. This strategy considers four aspects of the task, they are video type, the gathering history, the filesize of the video, the waiting time, then it adjusts the priority of the video in the waiting queue periodically by the gathering history The simulate result shows that the strategy can achieve a balance of the total waiting time between the two video types and it can adjust the parameter to adjust the seqence of the video, for the flexibility of video content gathering.