my software relies on this ability (it is a media player with three separate scene views in three separate windows)
a workaround (in use by QCamera) was to subclass QtAbstractVideoSurface and override "present()", and then send the frame to all the subscribed video surfaces, but the new class QVideoSink doesn't have a present() function, nor are any of its members virtual, and in any case QCamera no longer has the setViewfinder() method. so this route is also unavailable.
i need both of these things fixed, or a viable workaround.
simply add "virtual" to QVideoSink::newVideoFrame() would be sufficient to fix the camera problem, at least