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

Re: maxHeight and maxWidth

From: Jan-Ivar Bruaroey <jib@mozilla.com>
Date: Wed, 17 Feb 2016 12:45:30 -0500
To: Peter Thatcher <pthatcher@google.com>
Cc: "public-webrtc@w3.org" <public-webrtc@w3.org>
Message-ID: <56C4B1BA.7080408@mozilla.com>
On 2/17/16 12:36 PM, Peter Thatcher wrote:
> The original thread was about both screencasts and rotating cameras, 
> and I've mostly been focusing on the screencasting case (trying to 
> figure that out before moving on to rotation).
>
> But, actually, I have a question for you about getUserMedia:
>
> If I specify an exact height of 90 pixels (min and max are 90) and the 
> camera can't open that small, what will an implementation of 
> getUserMedia be expected to do?  Will it scale the camera's input in 
> order to get that exact height, or will it just say "nope"?  Or is it 
> implementation dependent?

I believe Chrome will rescale it to whatever you want, whereas Firefox 
will fail with OverconstrainedError, reflecting the fact that no camera 
on the machine has a native 160x90 mode. Both are to spec btw, but which 
one honors the intent of the spec?

See my other post right now about discovery and arbitrary scaling being 
mutually exclusive.

.: Jan-Ivar :.
Received on Wednesday, 17 February 2016 17:46:02 UTC

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