Add new multiappsrc or dynappsrc element with multiple output streams
Submitted by Justin Kim
if Audio/Video streams are separately given, playbin isn't able to handle two sources.
This is a suggestion about how to deploy multiple appsrcs and to use with playbin.
The basic idea started from here; http://lists.freedesktop.org/archives/gstreamer-devel/2014-January/045771.html
Simple documentation is included in codes.