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Demux in-browser: The preprocessed video bytes are returned to the page, where mp4box.js demuxes them into encoded video chunks，推荐阅读PDF资料获取更多信息
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Quadtree-based image compression formats and level-of-detail systems all work this way. Satellite imagery, terrain rendering, and geographic information systems use quadtree decomposition to serve data at varying resolutions: zoomed out, you see large coarse blocks; zoomed in, you see fine-grained tiles. The same principle extends to three dimensions (octrees) for volume rendering and 3D spatial indexing.