Currently, the live-streaming application running with real-time messaging protocol (RTMP) plays an important role in mobile smart devices. However, two main problems in running such application in the smart devices are the high bandwidth and large amount of energy requirements. In this paper, the available bandwidth and amount of energy in the battery are used simultaneously as input parameters for suitably selecting the video quality in the live-streaming application using Fuzzy logic. It is found that the developed system can select the appropriate video streaming quality accordingly. Using such system, a significant improvement is achieved; that is, the bandwidth and battery usages are reduced by 23 and 24 percent, respectively.