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Currently, according to the Cisco Annual Internet Report, between 80% and 85% of internet data traffic is generated by video content, making it imperative to develop methods or algorithms that enable the efficient transmission of multimedia content over the network. In this context, this article proposes an optimized algorithm for video traffic control in an SDN environment, allowing for adaptive real-time transmission. The methodology consists of the following stages: first, the video is transmitted at a minimum encoded bitrate; then, the available network bandwidth is measured, based on which the encoding rate and video quality are adjusted; and finally, the video is played on the client side. The results obtained using the control algorithm were compared with those obtained using common routing protocols such as RIP (Routing Information Protocol) and OSPF (Open Shortest Path First). The use of the control algorithm resulted in an 18.1% lower delay compared to RIP and a 94.8% lower delay compared to OSPF. Under background traffic conditions, SDN demonstrated a 27.23% lower delay than RIP and a 54.1% lower delay than OSPF. The main contribution of this work is, through the implementation of a testbed, the analysis of a mechanism that improves quality of service (QoS) and quality of experience (QoE) by optimizing real-time video transmission through the selection of the best route and/or the dynamic adjustment of video bitrate according to network conditions.
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