GraphicsLayerCA only updates media element layers on the main thread to avoid problems is low level frameworks. This is not necessary when using AVFoundation directly.
Created attachment 222705 [details]
Comment on attachment 222705 [details]
Clearing flags on attachment: 222705
Committed r163104: <http://trac.webkit.org/changeset/163104>
All reviewed patches have been landed. Closing bug.