Video preview proposal: grabPreview

I've added a couple of editorial pull requests to the media-capture spec:

https://github.com/w3c/mediacapture-main/pulls/martinthomson

One is not editorial, it's a new proposal:
https://github.com/w3c/mediacapture-main/pull/45

>From the PR:

This adds a new method to MediaDeviceInfo called grabPreview. It
provides applications with a way of acquiring a preview image for a
video input device.

I didn't add the ability to acquire a preview stream, because that is
totally creepy. This does risk creeping people out in a similar
fashion, so I've suggested that access be limited. I think that the
measures I have described are adequate, particularly because they
offer the UA quite a bit of flexibility in how often lights come on.
However, if we can't convince ourselves that they are, then this
probably isn't a great idea to pursue.

What I haven't done here is provide information on the aspect ratio of
the preview image, which will be necessary for the application to
successfully draw this without distorting it. I'll add that in a
subsequent commit if this idea sounds appealing.

Received on Sunday, 26 October 2014 23:00:25 UTC