W3C home > Mailing lists > Public > public-media-capture@w3.org > February 2016

[mediacapture-fromelement] Must the alpha channel be preserved, and what about encoding in an alpha-less format?

From: Philip Jägenstedt via GitHub <sysbot+gh@w3.org>
Date: Thu, 18 Feb 2016 10:46:37 +0000
To: public-media-capture@w3.org
Message-ID: <issues.opened-134543217-1455792394-sysbot+gh@w3.org>
foolip has just created a new issue for 
https://github.com/w3c/mediacapture-fromelement:

== Must the alpha channel be preserved, and what about encoding in an 
alpha-less format? ==
http://w3c.github.io/mediacapture-fromelement/#widl-HTMLCanvasElement-captureStream-MediaStream-double-frameRate

This doesn't say anything about alpha, but this spec may be the first 
time that we have `MediaStream`s with alpha channels. In 
http://software.hixie.ch/utilities/js/live-dom-viewer/saved/3899 
Firefox and Chrome get different behavior, Firefox preserves the alpha
 channel while Chrome discards it.

Note that the test isn't entirely reliable in Chrome, not sure why:
https://code.google.com/p/chromium/issues/detail?id=587793

Please view or discuss this issue at 
https://github.com/w3c/mediacapture-fromelement/issues/30 using your 
GitHub account
Received on Thursday, 18 February 2016 10:46:41 UTC

This archive was generated by hypermail 2.3.1 : Thursday, 18 February 2016 10:46:41 UTC