The Internet of Things is predicted to consist of over 50 billion devices aiming to solve\nproblems in most areas of our digital society. A large part of the data communicated is expected\nto consist of various multimedia contents, such as live audio and video. This article presents a\nsolution for the communication of high definition video in low-delay scenarios (<200 ms) under the\nconstraints of devices with limited hardware resources, such as the Raspberry Pi. We verify that it\nis possible to enable low delay video streaming between Raspberry Pi devices using a distributed\nInternet of Things system called the SensibleThings platform. Specifically, our implementation\ntransfers a 6 Mbps H.264 video stream of 1280 Ã?â?? 720 pixels at 25 frames per second between devices\nwith a total delay of 181 ms on the public Internet, of which the overhead of the distributed Internet\nof Things communication platform only accounts for 18 ms of this delay. We have found that the\nmost significant bottleneck of video transfer on limited Internet of Things devices is the video coding\nand not the distributed communication platform, since the video coding accounts for 90% of the\ntotal delay.
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