Just-in-Time Transcoding of 360° Video Streams

Adaptive streaming of 360° tiled video requires encoding tiles to multiple qualities to support client decisions in the light of fluctuating bandwidth and dynamic view-ports. Some static approaches allocate fixed encoding resources independently of the scene complexity introducing a significant resource overhead while other static approaches add a substantial time delay relative to the source. As tiles of 360 ° video have a skewed popularity with a statistical concentration of the user requests static approaches are resource inefficient. Specifically, in live streaming the tile popularity and encoding time statistics are not present beforehand.