WebKit2.Settings.enable_mediasource

Settings.enable_mediasource: Boolean (Read / Write / Construct)
  

Enable or disable support for MediaSource on pages. MediaSource is an experimental proposal which extends HTMLMediaElement to allow JavaScript to generate media streams for playback. The standard is currently a work-in-progress by the W3C HTML Media Task Force.

See also http://www.w3.org/TR/media-source/

Since 2.4