Interactive spatial navigation within a video is getting attention in the research community, especially in scenarios such as 360° video, video surveillance or region-of-interest viewing. With more content being delivered over the top, the complexity of spatial access to the video is increased by the need to perform bitrate adaptation to react to network variations. In this paper, we describe how spatial access can be performed in an adaptive HTTP streaming context, using tiling of the source content, MPEG-DASH and its SRD extensions. We describe a configurable implementation of these technologies, within the GPAC open-source player, allowing experimentations of different adaptation policies for tiled video content.
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