SVG data may come through multiple buffers, so keep track of the timestamp of the first buffer, and use it in preference. https://bugzilla.gnome.org/show_bug.cgi?id=628284
SVG data may come through multiple buffers, so keep track of the timestamp of the first buffer, and use it in preference. https://bugzilla.gnome.org/show_bug.cgi?id=628284