A file format is proposed based on the generic model and ISO base media file format. We first create a Directed Acyclic Graph model to describe the substreams and relationships among those substreams in a scalable video stream. 本文首先建立了一个有向无环图模型,该模型能够描述可扩展视频编码码流中各子码流和子码流间复杂的依赖关系。Iso的相序。