期刊名称：International Journal of Computer Science Issues
印刷版ISSN：1694-0784
电子版ISSN：1694-0814
出版年度：2019
卷号：16
期号：6
页码：1-9
DOI：10.5281/zenodo.3987056
出版社：IJCSI Press
摘要：Nowadays video streaming is growing over the social clouds, where end-users always want to share High Definition (HD) videos among friends. Mostly videos were recorded via smartphones and other HD devices and short time videos have a big file size. The big file size of videos required high bandwidth to upload and download on the Internet and also required more time to load in a web page for play. So avoiding this problem social cloud compress videos during the upload for smooth play and fast loading in a web page. Compression decreases the video quality which also decreases the quality of experience of end users. In this paper we measure the QoS of different standard video file formats on social clouds; they varied from each other in resolution, audio/video bitrate, and storage size. Videos were downloaded from YouTube and converted standard video file formats which provided by developers and upload/download at social clouds. During the upload of video standard file format, original video format converted in social clouds default supported file format and also compressed according to compression technique which set by the service provider. The Result shows that Facebook compressed HD Videos more as compared to Google videos. However, Facebook gives a better quality of compressed videos on slow networks, which were upload in the format of MOV, FLV, WMV, AVI, WebM and converted by Facebook into MP4 format for low resolutions and MP4 (HEVC and AVC) for 1080P and 2160P high resolutions. Google support all file formats and did not convert file format and provide high quality video streaming for high speed networks.
关键词：Quality of Service; Streaming; Video Quality; Video File Formats; Video Resolution.
