渐进式下载标准
是否有任何文档讨论渐进式下载的工作原理。我知道它基于 HTTP，但需要更多信息来了解如何下载数据以及播放器和 HTTP 服务器之间传输的消息类型。 是否有为此定义的标准。
Is there any document which talks about how progressive download works. I am aware it is based on HTTP but need more information as to how the data is downloaded and what kind of messages flows between the player and the HTTP server.
Is there any standard defined for the same.
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此文档是我能找到的最好的相关文档符合 HTTP 渐进式下载标准。
另一种方法是 HTTP Live Streaming，这是有详细记录的。
This document is the best I could find relating to standards for HTTP progressive downloads.
Another approach to this is HTTP Live Streaming which is well documented.
上面附加的文档讨论了动态自适应流。 HTTP 渐进式下载与自适应流式传输是完全不同的技术，因为它不是自适应的。
在渐进式下载中，视频（或内容）文件的下载就像通过 HTTP 进行的另一次下载一样。
The document attached above talks about the Dynamic Adaptive Streaming. HTTP progressive download is completely different technique than adaptive streaming, in the sense that it is NOT adaptive.
In progressive download, the video (or content) file is downloaded as if just another download happens over HTTP.