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[media-source] MediaSource in Worker

From: Daniel Baulig via GitHub <sysbot+gh@w3.org>
Date: Thu, 15 Dec 2016 18:20:03 +0000
To: public-html-media@w3.org
Message-ID: <issues.opened-195877800-1481826002-sysbot+gh@w3.org>
DanielBaulig has just created a new issue for 
https://github.com/w3c/media-source:

== MediaSource in Worker ==
The Videos team at Facebook has a growing need to move calls to Media 
Source Extensions off of the main thread and into a Worker. While most
 parts of your off-the-shelve streaming video player can be 
implemented in a Worker (fetching and parsing of the manifest as well 
as selecting and fetching of segments) the calls to and interactions 
with the Media Source Extensions API (e.g. 
`SourceBuffer.prototype.appendBuffer`, 
`SourceBuffer.prototype.remove`, etc) remain a bottleneck and have to 
happen on the main browser rendering thread. 

On a sizable and complex web site large blocks of JS execution can 
regularly block the main thread making videos slow to start playing 
and causing lots of rebuffering, especially in live videos where you 
can only buffer ahead very little data. To ensure great web video 
performance in the long run, even as web apps continue to grow in size
 and complexity, we believe we need to allow video players to move 
into Workers and off of the main thread.

We would like to propose this change to the working group and involve 
other API users as well as implementors in the discussion.

Please view or discuss this issue at 
https://github.com/w3c/media-source/issues/175 using your GitHub 
account
Received on Thursday, 15 December 2016 18:20:09 UTC

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